Register      Login
Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH FRONT

Solvent-Dependent Access to Two Different Ni4II Core Topologies from the First Use of Pyridine-2,6-dimethanol in Nickel(ii) Cluster Chemistry

Konstantina I. Alexopoulou A , Catherine P. Raptopoulou B , Vassilis Psycharis B , Aris Terzis B , Vassilis Tangoulis C E , Theocharis C. Stamatatos D E and Spyros P. Perlepes A E
+ Author Affiliations
- Author Affiliations

A Department of Chemistry, University of Patras, 26504 Patras, Greece.

B Institute of Materials Science, Pysicochemical Processes, Nanotechnology and Microsystems, Department of Materials Science, National Center for Scientific Research ‘Demokritos’, 15310 Aghia Paraskevi Attikis, Greece.

C Department of General and Inorganic Chemistry, Faculty of Chemistry, Aristotle University of Thessaloniki, PO Box 135, 54124 Thessaloniki, Greece.

D Department of Chemistry, Brock University, L2S 3A1 Saint Catharines, ON, Canada.

E Corresponding authors. Email: tstamatatos@brocku.ca; vtagkoul@chem.auth.gr; perlepes@patreas.upatras.gr

Australian Journal of Chemistry 65(12) 1608-1619 https://doi.org/10.1071/CH12424
Submitted: 14 September 2012  Accepted: 14 October 2012   Published: 16 November 2012

Abstract

The use of pyridine-2,6-dimethanol, pdmH2, in reactions with nickel(ii) acetate has led to two Ni4 clusters, depending on the solvent. [Ni4(O2CMe)4(pdmH)4]·MeCN (1·MeCN) can be obtained from MeCN and [Ni4(O2CMe)6(pdmH)2(EtOH)2]·1.2EtOH (2·1.2EtOH) from EtOH. Each cluster can be converted into the other in the appropriate solvent. The tetranuclear cluster molecule 1 possesses a distorted cubane {Ni43-OR)4}4+ core (RO = pdmH) with the NiII atoms and the alkoxide-type oxygen atoms from the η3 : η1 : μ3 pdmH ligands occupying alternate vertices of the cube; four η1 : η1 : μ MeCO2 groups cap four faces of the cube. The four NiII atoms in molecule 2 are located at four vertices of a defective dicubane and are bridged by six oxygen atoms, two μ3 from the η3 : η1 : η1 : μ3 pdmH ligands and four from four monoatomically bridging MeCO2 groups; peripheral ligation is provided by two η1 : η1 : μ MeCO2 groups and two terminal EtOH ligands. IR data are discussed in terms of the coordination modes of the ligands. Variable-temperature direct-current magnetic susceptibility data of 1 and 2 were modelled with two and three J values respectively, indicating diamagnetic ground states (S = 0). The sign and the magnitude of the J values are discussed in terms of structural features of the complexes.


References

[1]  (a) K. Graham, A. Ferguson, F. T. Douglas, L. H. Thomas, M. Murrie, Dalton Trans. 2011, 3125.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXjsVGrt7o%3D&md5=c87355a77bec40783c76e3ac1a3cc38eCAS |
      (b) R. Inglis, F. White, S. Piligkos, W. Wernsdorfer, E. K. Brechin, G. S. Papaefstathiou, Chem. Commun. 2011, 3090.
         | Crossref | GoogleScholarGoogle Scholar |
      (c) C. J. Milios, S. Piligkos, E. K. Brechin, Dalton Trans. 2008, 1809..
         | Crossref | GoogleScholarGoogle Scholar |
      (d) A. M. Ako, V. Mereacre, Y. Lan, W. Wernsdorfer, R. Clérac, C. E. Anson, A. K. Powell, Inorg. Chem. 2010, 49, 1.
         | Crossref | GoogleScholarGoogle Scholar |
      (e) J. Esteban, L. Alcázar, M. Torres-Molina, M. Monfort, M. Font-Bardia, A. Escuer, Inorg. Chem. 2012, 51, 5503.
         | Crossref | GoogleScholarGoogle Scholar |
      (f) C. M. Kizas, M. J. Manos, V. Nastopoulos, A. K. Boudalis, Y. Sanakis, A. J. Tasiopoulos, Dalton Trans. 2012, 1544.
         | Crossref | GoogleScholarGoogle Scholar |
      (g) C. Kozoni, M. Siczek, T. Lis, E. K. Brechin, C. J. Milios, Dalton Trans. 2009, 9117.
         | Crossref | GoogleScholarGoogle Scholar |
      (h) P. Cooper, F. Tuna, M. Shanmugan, L. Sorace, S. L. Heath, D. Collison, E. J. L. McInnes, R. E. P. Winpenny, Inorg. Chim. Acta 2008, 361, 3663.
         | Crossref | GoogleScholarGoogle Scholar |
      (i) C. Lampropoulos, Th. C. Stamatatos, M. J. Manos, A. J. Tasiopoulos, K. A. Abboud, G. Christou, Eur. J. Inorg. Chem. 2010, 2244.
         | Crossref | GoogleScholarGoogle Scholar |
      (j) K. G. Alley, R. Bircher, O. Waldmann, S. T. Ochsenbein, H. U. Güdel, B. Moubaraki, K. S. Murray, F. Fernandez-Alonso, B. F. Abrahams, C. Boskovic, Inorg. Chem. 2006, 45, 8950.
         | Crossref | GoogleScholarGoogle Scholar |
      (k) G. E. Kostakis, S. P. Perlepes, V. A. Blatov, D. M. Proserpio, A. K. Powell, Coord. Chem. Rev. 2012, 256, 1246.
         | Crossref | GoogleScholarGoogle Scholar |
      (l) L. M. Wittick, L. F. Jones, P. Jensen, B. Moubaraki, L. Spiccia, K. J. Berry, K. S. Murray, Dalton Trans. 2006, 1534.
         | Crossref | GoogleScholarGoogle Scholar |
      (m) S. K. Langley, R. A. Stott, N. F. Chilton, B. Moubaraki, K. S. Murray, Chem. Commun. 2011, 6281.
         | Crossref | GoogleScholarGoogle Scholar |
      (n) G. Brunet, F. Habib, C. Cook, T. Pathmalingam, F. Loiseau, I. Korobkov, T. J. Burchell, A. M. Beauchemin, M. Murugesu, Chem. Commun. 2012, 1287.
         | Crossref | GoogleScholarGoogle Scholar |

[2]  G. E. Kostakis, A. M. Ako, A. K. Powell, Chem. Soc. Rev. 2010, 39, 2238.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXmsFersbY%3D&md5=86548dd62320d6b1b66e0ddfa285eadfCAS |

[3]  M. H. Chisholm, Polyhedron 1998, 17, 2773.An in-depth discussion on the various meanings of the term ‘cluster’ in several areas of inorganic chemistry:
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1cXmslWqs78%3D&md5=9fe2b316db5a859d44a69bda1e4d2b7aCAS |

[4]  (a) E. C. Theil, M. Matzapetakis, X. Liu, J. Biol. Inorg. Chem. 2006, 11, 803.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD28XptVWrt7s%3D&md5=daddc4374bbffca288966c13641fe37dCAS |
      (b) J. S. Kanady, E. Y. Tsui, M. W. Day, T. Agapie, Science 2011, 333, 733.
         | Crossref | GoogleScholarGoogle Scholar |

[5]  M. Evangelisti, E. K. Brechin, Dalton Trans. 2010, 4672.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXlvF2htrc%3D&md5=fb38d8d99e3a5e3c3f1b42478c8d1a05CAS |

[6]     (a) D. Gatteschi, R. Sessoli, J. Villain, Molecular Nanomagnets 2006 (Oxford University Press: Oxford, UK).
      (b) R. Bagai, G. Christou, Chem. Soc. Rev. 2009, 38, 1011.
         | Crossref | GoogleScholarGoogle Scholar |
      (c) G. Aromi, E. K. Brechin, Struct. Bond. 2006, 122, 1.
         | Crossref | GoogleScholarGoogle Scholar |

[7]  (a) J. R. Friedman, M. P. Sarachik, J. Tejada, R. Ziolo, Phys. Rev. Lett. 1996, 76, 3830.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK28XivV2qsLk%3D&md5=6af0b9bfd39f44a03ea34be66eb0d790CAS |
      (b) L. Thomas, F. Lionti, R. Ballou, D. Gatteschi, R. Sessoli, B. Barbara, Nature 1996, 383, 145.
         | Crossref | GoogleScholarGoogle Scholar |

[8]  W. Wernsdorfer, R. Sessoli, Science 1999, 284, 133.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1MXitlCntbg%3D&md5=8a0f4b3995fa12971b210caea2531b96CAS |

[9]  (a) G. A. Timco, T. B. Faust, F. Tuna, R. E. P. Winpenny, Chem. Soc. Rev. 2011, 40, 3067.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXmsVWkuro%3D&md5=dfbbafc89f4539214e251bdbe8465efdCAS |
      (b) L. Bogani, W. Wernsdorfer, Nat. Mater. 2008, 7, 179.
         | Crossref | GoogleScholarGoogle Scholar |
      (c) M. N. Leuenberger, D. Loss, Nature 2001, 410, 789.
         | Crossref | GoogleScholarGoogle Scholar |
      (d) J. Tejada, E. M. Chudnovsky, E. del Barco, J. M. Hernandez, J. P. Spiller, Nanotechnology 2001, 12, 181.
         | Crossref | GoogleScholarGoogle Scholar |

[10]  (a) Th. C. Stamatatos, C. G. Efthymiou, C. C. Stoumpos, S. P. Perlepes, Eur. J. Inorg. Chem. 2009, 3361..
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXpsFygs7o%3D&md5=22b2a18d918805e4c79f2bdd6b2be4e9CAS |
      (b) C. G. Efthymiou, C. Papatriantafyllopoulou, K. I. Alexopoulou, C. P. Raptopoulou, R. Boca, J. Mrozinski, E. G. Bakalbassis, S. P. Perlepes, Polyhedron 2009, 28, 3373.
         | Crossref | GoogleScholarGoogle Scholar |
      (c) A. J. Tasiopoulos, S. P. Perlepes, Dalton Trans. 2008, 5537..
         | Crossref | GoogleScholarGoogle Scholar |
      (d) G. S. Papaefstathiou, S. P. Perlepes, Inorg. Chem. 2002, 23, 249.
         | Crossref | GoogleScholarGoogle Scholar |

[11]  (a) T. Taguchi, Th. C. Stamatatos, K. A. Abboud, C. M. Jones, K. M. Poole, T. A. O’ Brien, G. Christou, Inorg. Chem. 2008, 47, 4095.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXltVeitro%3D&md5=426f3fa339c0e3eb53e773d5c1f4c371CAS |
      (b) O. Roubeau, R. Clérac, Eur. J. Inorg. Chem. 2008, 4325..
         | Crossref | GoogleScholarGoogle Scholar |
      (c) J. Yoo, E. K. Brechin, A. Yamaguchi, M. Nakano, J. C. Huffman, A. L. Maniero, L.-C. Brunel, K. Awaga, H. Ishimoto, G. Christou, D. N. Hendrickson, Inorg. Chem. 2000, 39, 3615.
         | Crossref | GoogleScholarGoogle Scholar |

[12]  (a) S. Winter, W. Seichter, E. Weber, Z. Anorg. Allg. Chem. 2004, 630, 434.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2cXhvFWntbw%3D&md5=cc3561f83e896036acb4e48c3ee34cdcCAS |
      (b) S. Winter, W. Seichter, E. Weber, J. Coord. Chem. 2004, 57, 997.
         | Crossref | GoogleScholarGoogle Scholar |
      (c) Y. T. Yilmaz, S. Hamamci, C. Thöne, Polyhedron 2004, 23, 841.
         | Crossref | GoogleScholarGoogle Scholar |
      (d) M. Koman, M. Melnik, Polyhedron 1997, 16, 2721.
         | Crossref | GoogleScholarGoogle Scholar |

[13]  (a) Th. C. Stamatatos, G. C. Vlahopoulou, C. P. Raptopoulou, A. Terzis, A. Escuer, S. P. Perlepes, Inorg. Chem. 2009, 48, 4610.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXktlygs7s%3D&md5=2074d1e08d956ec2867947bd2eae11abCAS |
      (b) G. C. Vlahopoulou, D. I. Alexandropoulos, C. P. Raptopoulou, S. P. Perlepes, A. Escuer, Th. C. Stamatatos, Polyhedron 2009, 28, 3235.
         | Crossref | GoogleScholarGoogle Scholar |
      (c) E. Katsoulakou, D. Dermitzaki, K. F. Konidaris, E. E. Moushi, C. P. Raptopoulou, V. Psycharis, A. J. Tasiopoulos, V. Bekiari, E. Manessi- Zoupa, S. P. Perlepes, Th. C. Stamatatos, Polyhedron in press.

[14]  V. T. Yilmaz, S. Guney, O. Andac, W. T. A. Harrison, J. Coord. Chem. 2003, 56, 21.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38XpsV2hsLo%3D&md5=5c767cfe898e4b1511886e48b036a2f8CAS |

[15]  (a) H. Andres, R. Basler, A. J. Blake, C. Cadiou, G. Chaboussant, G. M. Grant, H.-U. Güdel, M. Murrie, S. Parsons, C. Paulsen, F. Semadini, V. Villar, W. Wernsdorfer, R. E. P. Winpenny, Chem. – Eur. J. 2002, 8, 4867.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38XoslKisL4%3D&md5=2c056b04d781813b71c87079f13a48c1CAS |
      (b) S. T. Ochsenbein, M. Murrie, E. Rusanov, H. Stoeckli- Evans, C. Sekine, H. U. Güdel, Inorg. Chem. 2002, 41, 5133.
         | Crossref | GoogleScholarGoogle Scholar |
      (c) E.-C. Yang, W. Wernsdorfer, S. Hill, R. S. Edwards, M. Nakano, S. Maccagnano, L. N. Zakharov, A. L. Rheingold, G. Christou, D. N. Hendrickson, Polyhedron 2003, 22, 1727.
         | Crossref | GoogleScholarGoogle Scholar |
      (d) M. Moragues-Cánovas, M. Helliwell, L. Ricard, E. Riviére, W. Wernsdorfer, E. K. Brechin, T. Mallah, Eur. J. Inorg. Chem. 2004, 2219.
         | Crossref | GoogleScholarGoogle Scholar |
      (e) A. Bell, G. Aromi, S. J. Teat, W. Wernsdorfer, R. E. P. Winpenny, Chem. Commun. 2005, 2808.
         | Crossref | GoogleScholarGoogle Scholar |
      (f) G. Aromi, S. Parsons, W. Wernsdorfer, E. K. Brechin, E. J. L. McInnes, Chem. Commun. 2005, 5038.
         | Crossref | GoogleScholarGoogle Scholar |
      (g) E.-C. Yang, W. Wernsdorfer, L. N. Zakharov, Y. Karaki, A. Yamaguchi, R. M. Isidro, G. Lu, S. A. Wilson, A. L. Rheingold, H. Ishimoto, D. N. Hendrickson, Inorg. Chem. 2006, 45, 529.
         | Crossref | GoogleScholarGoogle Scholar |
      (h) D. Venegas-Yazigi, E. Ruiz, J. Cano, S. Alvarez, Dalton Trans. 2006, 2643.
         | Crossref | GoogleScholarGoogle Scholar |
      (i) J. Lawrence, E.-C. Yang, R. Edwards, M. M. Olmstead, C. Ramsey, N. S. Dalal, P. K. Gantzel, S. Hill, D. N. Hendrickson, Inorg. Chem. 2008, 47, 1965.
         | Crossref | GoogleScholarGoogle Scholar |
      (j) A. Ferguson, J. Lawrence, A. Parkin, J. Sanchez-Benitez, K. V. Kamenev, E. K. Brechin, W. Wernsdorfer, S. Hill, M. Murrie, Dalton Trans. 2008, 6409.
         | Crossref | GoogleScholarGoogle Scholar |
      (k) R. T. W. Scott, L. F. Jones, I. S. Tidmarsh, B. Breeze, R. H. Laye, J. Wolowska, D. J. Stone, A. Collins, S. Parsons, W. Wernsdorfer, G. Aromi, E. J. L. McInnes, E. K. Brechin, Chem. – Eur. J. 2009, 15, 12389.
         | Crossref | GoogleScholarGoogle Scholar |
      (l) S. Hill, S. Data, J. Liu, R. Inglis, C. J. Milios, P. L. Feng, J. F. Henderson, E. del Barco, E. K. Brechin, D. N. Hendrickson, Dalton Trans. 2010, 4693.
         | Crossref | GoogleScholarGoogle Scholar |
      (m) A. K. Boudalis, M. Pissas, C. P. Raptopoulou, V. Psycharis, B. Abarca, R. Ballesteros, Inorg. Chem. 2008, 47, 10674.
         | Crossref | GoogleScholarGoogle Scholar |
      (n) S. Petit, P. Neugebauer, G. Pilet, G. Chastanet, A.-L. Barra, A. B. Antunes, W. Wernsdorfer, D. Luneau, Inorg. Chem. 2012, 51, 6645.
         | Crossref | GoogleScholarGoogle Scholar |

[16]  S. Carretta, P. Santini, G. Amorretti, M. Affronte, A. Candini, A. Chirra, I. S. Tidmarsh, R. H. Laye, R. Shaw, E. J. L. McInnes, Phys. Rev. Lett. 2006, 97, 207201.
         | Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BD28jitlCquw%3D%3D&md5=55f4bd3eeaee5180994023c65afe4af3CAS |

[17]  (a) G. Rogez, J.-N. Rebilly, A. L. Barra, L. Sorace, G. Blondin, N. Kirchner, M. Duran, J. van Slageren, S. Parsons, L. Ricard, A. Marvilliers, T. Mallah, Angew. Chem. Int. Ed. 2005, 44, 1876.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2MXislWrtr4%3D&md5=4dd44488f237a6c8dea152dc1c0538b8CAS |
      (b) J.-N. Rebilly, G. Charron, E. Rivière, R. Guillot, A.-L. Barra, M. D. Serrano, J. van Slageren, T. Mallah, Chem. – Eur. J. 2008, 14, 1169.
         | Crossref | GoogleScholarGoogle Scholar |

[18]  R. E. P. Winpenny, J. Chem. Soc., Dalton Trans. 2002, 1.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38Xkt12juw%3D%3D&md5=e8bdf29b59aa43c2cef86bdd5ce9e35bCAS |

[19]  V. T. Yilmaz, S. Guney, C. Thöne, Z. Anorg. Allg. Chem. 2002, 628, 1406.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38XkvVOjtLc%3D&md5=9cc1a6ec7c0c5bc933acd9b80e5355c4CAS |

[20]  (a) G. B. Deacon, R. J. Phillips, Coord. Chem. Rev. 1980, 33, 227.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL3MXjvVOqsw%3D%3D&md5=a1774d9940ec2e83f88699d09b137ebdCAS |
      (b) D. Martinez, M. Motevalli, M. Watkinson, Dalton Trans. 2010, 446.
         | Crossref | GoogleScholarGoogle Scholar |

[21]  R. A. Coxall, S. G. Harris, D. K. Henderson, S. Parsons, P. A. Tasker, R. E. P. Winpenny, J. Chem. Soc., Dalton Trans. 2000, 2349.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXks1Cnu74%3D&md5=55c0e704a5c643135b3be9142792fe23CAS |

[22]  (a) Th. C. Stamatatos, A. Escuer, K. A. Abboud, C. P. Raptopoulou, S. P. Perlepes, G. Christou, Inorg. Chem. 2008, 47, 11825.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXhtlGrsrbK&md5=bea4000ff48c3102dd87a151a9d8f343CAS |
      (b) C. Papatriantafyllopoulou, Th. C. Stamatatos, W. Wernsdorfer, S. J. Teat, A. J. Tasiopoulos, A. Escuer, S. P. Perlepes, Inorg. Chem. 2010, 49, 10486.
         | Crossref | GoogleScholarGoogle Scholar |

[23]  (a) J. M. Clemente-Juan, B. Chansou, B. Donnadieu, J.-P. Tuchagues, Inorg. Chem. 2000, 39, 5515.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXns12qtLc%3D&md5=c420de2514401cb51255fff486a7bbd2CAS |
      (b) A. Escuer, M. Font-Bardia, S. B. Kumar, X. Solans, R. Vicente, Polyhedron 1999, 18, 909.
         | Crossref | GoogleScholarGoogle Scholar |
      (c) W. Vreugdenhill, J. G. Haasnoot, J. Reedijk, A. L. Spek, Inorg. Chim. Acta 1987, 129, 205.
         | Crossref | GoogleScholarGoogle Scholar |
      (d) M. S. El Fallah, E. Rentschler, A. Caneschi, D. Gatteschi, Inorg. Chim. Acta 1996, 247, 231.
         | Crossref | GoogleScholarGoogle Scholar |
      (e) M.-L. Tong, S.-L. Zheng, J.-X. Shi, Y.-X. Tong, H. K. Lee, X.-M. Chen, J. Chem. Soc., Dalton Trans. 2002, 1727.
         | Crossref | GoogleScholarGoogle Scholar |
      (f) C. Boskovic, E. Rusanov, H. Stoeckli-Evans, H. U. Güdel, Inorg. Chem. Commun. 2002, 5, 881.
         | Crossref | GoogleScholarGoogle Scholar |
      (g) T. K. Paine, E. Rentschler, T. Weyhermüller, P. Chaudhuri, Eur. J. Inorg. Chem. 2003, 3167.
         | Crossref | GoogleScholarGoogle Scholar |
      (h) G. Aromi, A. S. Batsanov, P. Christian, M. Helliwell, O. Roubeau, G. A. Timco, R. E. P. Winpenny, Dalton Trans. 2003, 4466.
         | Crossref | GoogleScholarGoogle Scholar |
      (i) T. Shiga, H. Oshio, Sci. Technol. Adv. Mater. 2005, 6, 565.
         | Crossref | GoogleScholarGoogle Scholar |
      (j) A. Sieber, C. Boskovic, R. Bircher, O. Waldmann, S. T. Ochsenbein, G. Chaboussant, H. U. Güdel, N. Kirchmer, J. V. Slageren, W. Wernsdorfer, A. Neels, H. Stoeckli-Evans, S. Janssen, F. Juranyi, H. Mutka, Inorg. Chem. 2005, 44, 4315.
         | Crossref | GoogleScholarGoogle Scholar |
      (k) M. A. Halcrow, J.-S. Sun, J. C. Huffman, G. Christou, Inorg. Chem. 1995, 34, 4167.
         | Crossref | GoogleScholarGoogle Scholar |

[24]  (a) C. G. Efthymiou, C. Papatriantafyllopoulou, G. Aromi, S. J. Teat, G. Christou, S. P. Perlepes, Polyhedron 2011, 30, 3022.Selected literature from our group:
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXhsFartbfI&md5=91748b3d970a76e065f6d4d306d40646CAS |
      (b) C. Papatriantafyllopoulou, C. G. Efthymiou, C. P. Raptopoulou, R. Vicente, E. Manessi-Zoupa, J. Mol. Struct. 2007, 829, 176.
         | Crossref | GoogleScholarGoogle Scholar |
      (c) C. G. Efthymiou, C. P. Raptopoulou, A. Terzis, R. Boča, M. Korabic, J. Mrozinski, S. P. Perlepes, E. G. Bakalbassis, Eur. J. Inorg. Chem. 2006, 2236.
         | Crossref | GoogleScholarGoogle Scholar |
      (d) G. S. Papaefstathiou, A. Escuer, F. A. Maunter, C. Raptopoulou, A. Terzis, S. P. Perlepes, R. Vicente, Eur. J. Inorg. Chem. 2005, 879.
         | Crossref | GoogleScholarGoogle Scholar |

[25]  K. Isele, F. Gigon, A. F. Williams, G. Bernardinelli, P. Franz, S. Decurtins, Dalton Trans. 2007, 332.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2sXntVWh&md5=c479b45537da84aeebb790125d414d2cCAS |

[26]  K. L. Taft, A. Caneschi, L. E. Pence, C. D. Delfs, G. C. Papaefstathiou, S. Lippard, J. Am. Chem. Soc. 1993, 115, 11753.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK2cXit1Cisg%3D%3D&md5=123a1f826165cc2da5c4bb55cd71b956CAS |

[27]  R. H. Holm, S. Ciurli, J. A. Weigel, Prog. Inorg. Chem. 1990, 38, 1.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK3MXhvFygs7Y%3D&md5=6421133918ffc51157f92f674bf909a1CAS |

[28]  G. W. Brudvig, H. H. Thorp, R. H. Crabtree, Acc. Chem. Res. 1991, 24, 311.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK3MXmt1yhu74%3D&md5=45bb862b8ec93b6ab7943f6ee9ed0e5bCAS |

[29]  (a) K. Wieghardt, Angew. Chem. Int. Ed. 1989, 28, 1153.
         | Crossref | GoogleScholarGoogle Scholar |
      (b) M. W. Wemple, H.-L. Tsai, K. Folting, D. N. Hendrickson, G. Christou, Inorg. Chem. 1993, 32, 2025.
         | Crossref | GoogleScholarGoogle Scholar |
      (c) A. Rompel, J. C. Andrews, R. M. Cinco, M. W. Wemple, G. Christou, N. A. Law, V. L. Pecoraro, K. Sauer, V. K. Yachandra, M. P. Lein, J. Am. Chem. Soc. 1997, 119, 4465.
         | Crossref | GoogleScholarGoogle Scholar |

[30]  (a) K. N. Ferreira, T. M. Iverson, K. Maghlaoui, J. Barber, S. Iwata, Science 2004, 303, 1831.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2cXitFehtbs%3D&md5=031fd950c39696f610bd2aa132128886CAS |
      (b) N. Kamiya, J.-R. Shen, Proc. Natl. Acad. Sci. USA 2003, 100, 98.
         | Crossref | GoogleScholarGoogle Scholar |

[31]  Y. Umena, K. Kawakami, J.-R. Shen, N. Kamiya, Nature 2011, 473, 55.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXkslCmtLg%3D&md5=f7b48594fae4a870a2b3d1c7ed10df43CAS |

[32]  (a) S. Mukherjee, J. A. Stull, J. Yano, Th. C. Stamatatos, K. Pringouri, T. A. Stich, K. A. Abboud, R. D. Britt, V. K. Yachandra, G. Christou, Proc. Natl. Acad. Sci. USA 2012, 109, 2257.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XivFSjsr8%3D&md5=4cfa76569ebed1eafcb3ee4c3ea0772cCAS |
      (b) E. S. Koumousi, S. Mukherjee, C. Beavers, S. J. Teat, G. Christou, Th. S. Stamatatos, Chem. Commun. 2011, 11128.
         | Crossref | GoogleScholarGoogle Scholar |

[33]  J. A. Bertrand, C. Marbela, D. G. Vanderneer, Inorg. Chim. Acta 1978, 26, 113.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaE1cXhsVClsbw%3D&md5=91505e4f2fb10d2f318c98a71dc573d2CAS |

[34]  (a) S. M. J. Aubin, M. W. Wemple, D. M. Adams, H.-L. Tsai, G. Christou, D. N. Hendrickson, J. Am. Chem. Soc. 1996, 118, 7746.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK28Xks1CltLg%3D&md5=48a765ba5f169b02ba81926eb1c7d0a8CAS |
      (b) E.-C. Yang, D. N. Hendrickson, W. Wernsdorfer, M. Nakano, L. N. Zakharov, R. D. Sommer, A. L. Rheingold, M. Ledezma-Gairaud, G. Christou, J. Appl. Phys. 2002, 91, 7382.
         | Crossref | GoogleScholarGoogle Scholar |

[35]  G. Chaboussant, R. Basler, H.-U. Güdel, S. Ochsenbein, A. Parkin, S. Parsons, G. Rajaraman, A. Sieber, A. A. Smith, G. A. Timco, R. E. P. Winpenny, Dalton Trans. 2004, 2758.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2cXmvFaju7Y%3D&md5=8914e4a1323d1e97b2ba5e680982e310CAS |

[36]  (a) A. K. Katsenis, V. G. Kesler, G. S. Papaefstathiou, Dalton Trans. 2011, 4590.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXkvVKmtro%3D&md5=51102596f4331bf7143947d78bb90381CAS |
      (b) Z. Serna, N. De la Pinta, M. K. Urtiaga, L. Lezama, G. Madariaga, J. M. Clemente-Juan, E. Coronado, R. Cortes, Inorg. Chem. 2010, 49, 11541.
         | Crossref | GoogleScholarGoogle Scholar |
      (c) S. B. Jedner, H. Schwoppe, H. Nimir, A. Rompel, D. A. Brown, B. Krebs, Inorg. Chim. Acta 2002, 340, 181.
         | Crossref | GoogleScholarGoogle Scholar |
      (d) Z. E. Serna, M. G. Barandika, R. Cortes, M. K. Urtiaga, G. E. Barberis, T. Rojo, J. Chem. Soc., Dalton Trans. 2000, 29.
         | Crossref | GoogleScholarGoogle Scholar |
      (e) P. King, R. Clerac, W. Wernsdorfer, C. E. Anson, A. K. Powell, Dalton Trans. 2004, 2670.
         | Crossref | GoogleScholarGoogle Scholar |
      (f) J. M. Clemente-Juan, E. Coronado, J. R. Galán-Mascarós, C. J. Gómez-Garcia, Inorg. Chem. 1999, 38, 55.
         | Crossref | GoogleScholarGoogle Scholar |
      (g) T. K. Karmakar, S. K. Chandra, J. Ribas, G. Mostafa, T. H. Lu, B. K. Ghosh, Chem. Commun. 2002, 2364.
         | Crossref | GoogleScholarGoogle Scholar |
      (h) S. Demeshko, G. Leibeling, W. Maringgele, F. Meyder, C. Mennerich, H.-H. Klauss, H. Pritzkow, Inorg. Chem. 2005, 44, 519.
         | Crossref | GoogleScholarGoogle Scholar |
      (i) S. S. Tandon, S. D. Bunge, R. Rakosi, Z. Xu, L. K. Thompson, J. Chem. Soc., Dalton Trans. 2009, 6536.
      (j) Z. Zhang, J. Liu, E. Wang, C. Qin, Y. Li, Y. Qi, X. Wang, Dalton Trans. 2008, 463.
         | Crossref | GoogleScholarGoogle Scholar |
      (k) D.-Y. Wu, W. Wang, W.-J. Hua, Y. Song, C.-Y. Duan, S.-H. Li, Q.-J. Meng, Dalton Trans. 2007, 1838.
         | Crossref | GoogleScholarGoogle Scholar |

[37]  (a) H. Li, Z. J. Zhong, W. Chen, X.-Z. You, J. Chem. Soc., Dalton Trans. 1997, 463.
         | Crossref | GoogleScholarGoogle Scholar |
      (b) S. R. Breeze, S. Wang, J. E. Greedan, N. P. Raju, J. Chem. Soc., Dalton Trans. 1998, 2327.
         | Crossref | GoogleScholarGoogle Scholar |
      (c) Y. Sunatsuki, H. Shimada, T. Matsuo, M. Nakamura, F. Kai, N. Matsumoto, N. Re, Inorg. Chem. 1998, 37, 5566.
         | Crossref | GoogleScholarGoogle Scholar |
      (d) Z. E. Serna, M. K. Urtiaga, M. G. Barandika, R. Cortés, S. Martin, L. Lezama, M. I. Arriortua, T. Rojo, Inorg. Chem. 2001, 40, 4550.
         | Crossref | GoogleScholarGoogle Scholar |

[38]  (a) E. K. Brechin, J. Yoo, M. Nakano, J. C. Huffman, D. N. Hendrickson, G. Christou, Chem. Commun. 1999, 783.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1MXislelsbY%3D&md5=a5a2cd215aeffff3e6f58c52861a3acbCAS |
      (b) Th. C. Stamatatos, K. M. Poole, K. A. Abboud, W. Wernsdorfer, G. Christou, Chem. Commun. 2008, 5506.
      (c) C. Boskovic, W. Wernsdorfer, K. Folting, J. C. Huffman, D. N. Hendrickson, G. Christou, Inorg. Chem. 2002, 41, 5107.
         | Crossref | GoogleScholarGoogle Scholar |
      (d) M. Murugesu, W. Wernsdorfer, K. A. Abboud, Polyhedron 2005, 24, 2894.
         | Crossref | GoogleScholarGoogle Scholar |
      (e) M. Murugesu, M. Habrych, W. Wernsdorfer, K. A. Abboud, G. Christou, J. Am. Chem. Soc. 2004, 126, 4766.
         | Crossref | GoogleScholarGoogle Scholar |
      (f) M. Murugesu, S. Takahashi, A. Wilson, K. A. Abboud, W. Wernsdorfer, S. Hill, G. Christou, Inorg. Chem. 2008, 47, 9459.
         | Crossref | GoogleScholarGoogle Scholar |
      (g) Th. C. Stamatatos, K. A. Abboud, W. Wernsdorfer, G. Christou, Angew. Chem. Int. Ed. 2007, 46, 884.
         | Crossref | GoogleScholarGoogle Scholar |
      (h) Th. C. Stamatatos, K. A. Abboud, W. Wernsdorfer, G. Christou, Polyhedron 2007, 26, 2095.
         | Crossref | GoogleScholarGoogle Scholar |
      (i) T. Taguchi, M. S. Thompson, K. A. Abboud, G. Christou, Dalton Trans. 2010, 9131.
         | Crossref | GoogleScholarGoogle Scholar |
      (j) M. Murugesu, A. Mishra, W. Wernsdorfer, K. A. Abboud, G. Christou, Polyhedron 2006, 25, 613.
         | Crossref | GoogleScholarGoogle Scholar |
      (k) X.-Q. Zhao, Y. Lan, B. Zhao, P. Cheng, C. E. Anson, A. K. Powell, Dalton Trans. 2010, 4911.
         | Crossref | GoogleScholarGoogle Scholar |
      (l) M. M. Belmonte, E. C. Escudero-Adán, J. Benet-Bucholz, A. W. Kleij, Eur. J. Inorg. Chem. 2009, 5307.
         | Crossref | GoogleScholarGoogle Scholar |
      (m) D. Anselmo, E. C. Escudero-Adán, J. Benet-Bucholz, Dalton Trans. 2009, 7368.
         | Crossref | GoogleScholarGoogle Scholar |
      (n) N. Farfán, H. Höpfl, Heteroatom Chem. 1998, 9, 377.
         | Crossref | GoogleScholarGoogle Scholar |
      (o) P.-P. Yang, X.-F. Gao, H.-B. Song, S. Zhang, X.-L. Mei, L.-C. Li, D.-Z. Liao, Inorg. Chem. 2011, 50, 720.
         | Crossref | GoogleScholarGoogle Scholar |
      (p) P.-P. Yang, Z. Anorg. Allg. Chem. 2011, 637, 1234.
         | Crossref | GoogleScholarGoogle Scholar |

[39]  H. Miyasaka, K. Nakata, L. Lecren, C. Coulon, Y. Nakazawa, T. Fujisaki, K.-i. Sugiura, M. Yamashita, R. Clérac, J. Am. Chem. Soc. 2006, 128, 3770.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD28Xhs1Grt7g%3D&md5=51c7b01c52ef6cfd903a963b69331742CAS |

[40]  W. L. Gladfelter, M. W. Lynch, W. P. Schaefer, D. N. Hendrickson, H. B. Gray, Inorg. Chem. 1981, 20, 2390.
         | Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL3MXkslahu7g%3D&md5=2c50d4e83b26de77657f92c73fa8cd58CAS |

[41]  S. Worl, H. Pritzkow, I. O. Fritsky, R. Krämer, Dalton Trans. 2005, 27.
         | Crossref | GoogleScholarGoogle Scholar |

[42]  J. J. Borrás-Almenar, J. M. Clemente-Juan, E. Coronado, B. S. Tsukerblat, J. Comput. Chem. 2001, 22, 985.
         | Crossref | GoogleScholarGoogle Scholar |

[43]  Program 66, Quantum Chemistry Program Exchange 1984 (Indiana University: Bloomington, IN).

[44]  G. M. Sheldrick, SHELXS-97: Program for X-ray Crystal Structure Solution 1997 (University of Gottingen: Gottingen, Germany).

[45]  G. M. Sheldrick, SHELXL-97: Program for X-ray Crystal Structure Solution 1997 (University of Gottingen: Gottingen, Germany).