Charge-assisted Hydrogen-bonded Linear Second-sphere Assemblies MII(DABP)3]3[Cr(C2O4)3]2·14H2O (M = Cu, Ni, Fe, Zn, and Mn) with a Discrete (H2O)14 Cluster of S 6 Symmetry
Fuyu Zhuge A D , Biao Wu A B E , Lihuan Dong B , Jin Yang B , Christoph Janiak C , Ning Tang B and Xiao-Juan Yang A BA State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
B State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China.
C Institut für Anorganische und Analytische Chemie, Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany.
D Graduate School of Chinese Academy of Sciences, Beijing 100049, China.
E Corresponding author. Email: wubiao@lzb.ac.cn
Australian Journal of Chemistry 63(9) 1358-1364 https://doi.org/10.1071/CH09557
Submitted: 16 October 2009 Accepted: 17 July 2010 Published: 9 September 2010
Abstract
A series of isomorphous second-sphere coordination compounds [MII(DABP)3]3[Cr(C2O4)3]2·14H2O (DABP = 5,5′-diamino-2,2′-bipyridine; M = Cu (1), Ni (2), Fe (3), Zn (4), and Mn (5)) have been constructed through multiple charge-assisted N–H‐–O hydrogen-bonding interactions between the oxalate ligands in [Cr(C2O4)3]3– (unit B) and the NH2 groups in the [M(DABP)3]2+ complex (unit A). The chiral [M(DABP)3]2+ cations and [Cr(C2O4)3]3– anions with the same Λ (or Δ) configuration interdigitate alternately, affording linear A3B2 secondary building units. Two adjacent A3B2 units adopting opposite configurations are linked by a six-cornered star-shaped 14-water cluster of S 6 symmetry (unit C) to form a racemic 1D linear chain –A3B2(Λ)–C–A3B2(Δ)–C–. The microstructure of compound 1 shows a 3D flower-like morphology.
Acknowledgement
This work was supported by the National Natural Science Foundation of China (grant no. 20872149), and the ‘Bairen Jihua’ project of the Chinese Academy of Sciences.
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