New classes of zerovalent titanium carbonyls; first structural characterisation of a seven-co-ordinate titanium complex containing only unidentate ligands: Ti(CO)5(SnPh3)22– 1

Abstract

Seven-co-ordinate zerovalent titanium carbonyls containing only unidentate ligands, Ti(CO)₅(EPh₃)₂^2–(E = Ge, Sn, structurally characterized for Sn), and organoarsine and arylphosphine ligands, Ti(CO)₃[o-C₆H₄(AsMe₂)₂]₂ and Ti(CO)₄[MeC(CH₂PPh₂)₃], respectively, have been prepared for the first time from highly reactive and quite thermally unstable low valent titanium intermediates, one of which has been characterized as Ti(CO)₅(PMe₃)₂ on the basis of ¹³C and ³¹P n.m.r. spectra.