Thiokohlensäure-Komplexe von Metallen der VI. Nebengruppe / Thiocarbonic Acid Complexes of Group VI Metals

Abstract

The new complexes (OC)₅MSC(X)Y (8-5) are obtained by reaction of (OC)₅MTHF (1) [M = Cr (a), Mo (b), W (c)] with different thiocarbonate, thiourea and thiourethane ligands S = C(X)Y (2a-h). Structure and bonding conditions are discussed on the basis of their IR and ¹³C NMR spectra. From the spectroscopic data the ligands 2a-h can be arranged in a row with increasing π-acceptor properties.