Perfluoromethyl-element-liganden: XXXVI. Chrom-, molybdän- und wolframkomplexe des typs M(CO)5L und M(CO)4L2 mit mercaptophosphan-liganden

Abstract The coordinating properties of the ligands L 1 (= MeP(SMe) 2 ) and L 2 (= CF 3 P(SMe) 2 ) have been studied by synthesis and spectroscopic investigations (IR, NMR, MS) of their chromium, molybednum and tungsten complexes M(CO) 5 L (M = Cr, Mo, W, L 1 : 1 – 3 ; L 2 : 4 – 6 and M(CO) 4 L 2 (L 1 : 7 – 9 ; L 2 : 10 – 12 . Complexes 1 – 6 are obtained by indirect photochemical substitution via M(CO) 5 THF, compounds 7 – 12 by replacement of norbornadiene (NBD) in M(CO) 4 NBD. Spectroscopic data [η(CO), Δδ] support the σ-donor/π-acceptor model of the MP bonds and the influence of mesomeric besides inductive and steric effects.