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Pentacoordination in Group 15 ‘onium salts. A room-temperature synthesis of an intramolecularly pentacoordinated tetraarylstibonium salt containing the new polyiodocuprate anion [Cu14I18]4−, and a structural comparison with related pentacoordinated arsonium and phosphonium cations

2001; Elsevier BV; Volume: 318; Issue: 1-2 Linguagem: Inglês

10.1016/s0020-1693(01)00412-1

1873-3255

David W. Allen, Thomas Gelbrich, Michael B. Hursthouse,

Metal complexes synthesis and properties

Intramolecularly pentacoordinated tetraarylstibonium salts have been obtained at room temperature from the reactions of ortho-iodoarylimino coordination template systems with triarylstibines and copper(I) iodide in acetonitrile, the related bromo- and chloro-arenes being unreactive under these conditions. The X-ray crystal structure of one of these compounds has been determined, and found to contain, as the counter anion, a new type of poly(iodocuprate) species. The structure of the stibonium ion is compared with those of the structurally analogous arsonium and phosphonium cations, thus enabling a detailed comparison of bonding parameters for the heavier Group 15 elements.