Tantalum(V) fluoride complexes of thio- and seleno-ether ligands and a comparison with the TaX5 (X=Cl or Br) analogues


Benjamin, Sophie L., Hyslop, Alison, Levason, William and Reid, Gillian (2012) Tantalum(V) fluoride complexes of thio- and seleno-ether ligands and a comparison with the TaX5 (X=Cl or Br) analogues. Journal of Fluorine Chemistry, 137, 77-84. (doi:10.1016/j.jfluchem.2012.02.014).

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Description/Abstract

Reaction of TaF5 with SMe2 and RS(CH2)2SR (R = Me, Et or iPr) in anhydrous CH2Cl2 solution produce colourless, extremely moisture sensitive crystals of [TaF4(SMe2)4][TaF6] and [TaF4{RS(CH2)2SR}2][TaF6] respectively, which contain eight-coordinate cations and octahedral anions, whereas TaF5 reacts with neat SR2 (R = Me or Et) to form six-coordinate [TaF5(SR2)]. Very unstable [TaF5(SeMe2)] and [(TaF5)2{μ-MeSe(CH2)2SeMe}] were isolated with the selenoether ligands and also contain six-coordinate tantalum species. Selected complexes of TaCl5 and TaBr5 have been prepared for comparison. The complexes have been characterised by IR, UV/visible and 1H and 19F{1H} NMR spectroscopies, and X-ray crystal structures are reported for [TaF4{MeS(CH2)2SMe}2][TaF6], [(TaCl5)2{μ-MeSe(CH2)2SeMe}] and [TaCl5(SeMe2)]

Item Type: Article
ISSNs: 0022-1139 (print)
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Natural and Environmental Sciences > Chemistry
ePrint ID: 336923
Date Deposited: 11 Apr 2012 13:59
Last Modified: 27 Mar 2014 20:20
URI: http://eprints.soton.ac.uk/id/eprint/336923

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