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[(ZnSb6)2]4-: a new structure type for coupled norbornadiene-like subunits
Yi Wang1, Peter Zavalij, Bryan Eichhorn
1Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA. eichhorn@umd.edu.
Chemical Communications (Cambridge, England)
|October 11, 2017
Abstract:
The norbornadiene-like bimetallic dimer [(ZnSb6)2]4- anion (1) was prepared by direct extraction from a ternary alloy with nominal composition "K6ZnSb5" in ethylenediamine/toluene/2,2,2-crypt solutions. The structure represents a new type for coupled norbornadiene subunits, however, distortions around the Zn2+ ions degrade the overall symmetry. The Zn2+ ions achieve a 16e- configuration and reside in near perfect ZnSb3 triangular coordination environments. DFT calculations reveal a 2.35 eV HOMO-LUMO gap and suggest covalent bonding between the Zn and Sb atoms.