Crystal Structure of Cs2Zn(NO2)4: Influence of Steric Crowding on Nitrite Coordination
Susan G. Oates A , Michael A. Hitchman A D , Brian W. Skelton B , Robert Stranger C , Horst Stratemeier A and Allan H. White B DA School of Chemistry, University of Tasmania, Hobart TAS 7001, Australia.
B Chemistry M313, University of Western Australia, Crawley WA 6009, Australia.
C Chemistry Department, Australian National University, Canberra ACT 2601, Australia.
D Corresponding authors. Email: michael.hitchman@utas.edu.au; ahw@chem.uwa.edu.au
Australian Journal of Chemistry 58(3) 224-227 https://doi.org/10.1071/CH04270
Submitted: 10 November 2004 Accepted: 25 January 2005 Published: 15 March 2005
Abstract
The crystal structure of Cs2[Zn(NO2)4] has been determined by X-ray diffraction. Each nitrite ion in the Zn(NO2)42− group forms one short [2.080(3) Å] and one long [2.516(3) Å] Zn–O bond, the metal–ligand interaction being intermediate between symmetrical chelation and syn-unidentate nitrito coordination. It seems likely that this unsymmetrical geometry is adopted in order to minimize ligand–ligand repulsions, though density functional theory calculations suggest a very shallow potential energy curve for the complex.
Acknowledgment
M.A.H., R.S., and A.H.W. thank the Australian Research Commission for financial assistance.
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