t-Butylimido complexes of chromium(V). X-Ray crystal structure of t-butylimidotrichlorobis(ethyldiphenylphosphine)chromium(V)

Abstract

Monoimido complexes of chromium(v) have been obtained by chlorination of Cr^VI(NBu^t)₂Cl₂ to give an oil, ‘Cr(NBu^t)Cl₃,’ which on dissolution in tetrahydrofuran (thf) or dimethoxyethane and crystallising or by interaction with nitrogen or phosphorus ligands gives adducts of stoichiometry Cr(NBu^t)Cl₃L₂, e.g. L = thf, quinuclidine, PMe₃, etc.; the X-ray structure of Cr(NBu^t)Cl₃(EtPh₂P)₂ shows the six-coordinate compound to have trans phosphine and mer chloro groups.