Crystal Structure of Cs2Zn(NO2)4: Influence of Steric Crowding on Nitrite Coordination

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Contents Vol 58(3)

doi:10.1071/CH04270

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, Allan H. White ^B ^D

^A 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





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Australian Journal of Chemistry 58(3) 224–227 http://dx.doi.org/10.1071/CH04270
Submitted: 10 November 2004 Accepted: 25 January 2005 Published online: 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)₄^2- 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.