Co-ordination chemistry of tetrachloro(pentachloroethylimido)tungsten(VI) and a related imidotungsten(VI) species

Abstract

The species [WCl₄(NC₂Cl₅)]·CCl₃CN and [WCl₄(NCCl₂CH₂Cl)]·CH₂ClCN have been allowed to react with a range of ligands. Adducts of formulation [WCl₄(NC₂Cl₅)]·L [L = OEt₂, tetrahydrofuran (thf), tetrahydropyran, PPh₃O, SEt₂, tetrahydrothiophen (tht), 1,4-oxathian (oxth), Ph₂PCH₂CH₂PPh₂, MeCN, pyridine, 2,2′-bipyridine (2,2′-bipy), or 1,10-phenanthroline], 2[WCl₄(NC₂Cl₅)]·L [L = 1,4-dioxan, 4,4′-bipy, or 1,4-dithian] and [WCl₄(NCCl₂CH₂CH₂Cl)]·L (L = thf, oxth, tht, or Bu^tCN) have been isolated and characterised by measurement of n.m.r. and i.r. spectra.