Five-co-ordinate, bis(catecholato) complexes of silicon(IV)

D F EVANS, A M Z SLAWIN, D J WILLIAMS, C Y WONG, J D WOOLLINS

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22 Citations (Scopus)

Abstract

The synthesis of a series of five-co-ordinate bis(catecholato) complexes of silicon(IV) of the type [SiRL2]- is reported, where R = Ph, Me, Et, or Pr(n) and H2L = catechol and its derivatives. The complexes have been characterised by H-1, C-13 and Si-29 NMR spectroscopy in Me2SO, elemental analysis and fast atom bombardment mass spectroscopy. Complexes derived from asymmetric catechols which give rise to non-statistical, geometrical isomerism in the distorted trigonal-bipyramidal conformation have been investigated by multinuclear NMR spectroscopy. The crystal structure of the bis(3,5-dinitrocatecholato)methyl-silicate anion is reported. It exhibits a slightly distorted trigonal-bipyramidal geometry. Aryl-aryl and nitro-nitro interactions play a dominant role in the solid-state packing. Mixed-ligand complexes containing different catecholato derivatives have also been studied.

Original languageEnglish
Pages (from-to)2383-2387
Number of pages5
JournalJournal of the Chemical Society, Dalton Transactions
Issue number15
DOIs
Publication statusPublished - 7 Aug 1992

Keywords

  • 6-COORDINATE

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