Complexes of niobium(V) and tantalum(V) with phosphorus and arsenic ligands

G. Jamieson, W. E. Lindsell

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11 Citations (Scopus)


Complexation reactions between [M2Cl10] (M = Nb, Ta) and some phosphine, phosphite and arsine ligands have been investigated. Complexes [MCl5L2] {M = Nb, L2 = (PMe2Ph)2, (P(OPh)3)2, (dmpe)2 dppe and dpae; M = Ta, L2 = (PMe2Ph)2, dmpe, dppe and dpae} have been isolated and characterised by analysis, IR and 1H NMR spectroscopy and, in three cases, by 31P NMR spectroscopy. Reactions of other phosphines (PMePh2, PPh3) and phosphites {P(OEt)3, P(OPh)3} with [M2Cl10] have also been studied. The nature of the phosphorus complexes appears to be sterically controlled and depends on the cone angles of the ligands. Products [M(C6F5)xCl5-x] (x = 2-3, M = Nb, Ta) are formed by [M2Cl10] and pentafluorophenyllithium and these have been investigated by analysis, IR and 19F NMR spectroscopy. A ditertiary arsine adduct, [Nb(C6F5)2Cl3(dpae)], has also been isolated and characterised. © 1978.

Original languageEnglish
Pages (from-to)113-118
Number of pages6
JournalInorganica Chimica Acta
Issue numberC
Publication statusPublished - 1978


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