Carbonyl complexes of molybdenum and tungsten with sulfur donores VI. Reactions of carbonyl complexes of molybdenum(0) and tungsten(0) with uninegative (S,X)-donor ligands (X = S, N, P).

Article abstract of DOI:10.1016/0022-328X(90)87055-I

The reactions of the zerovalent carbonyl complexes, M(CO)6, M(CO)5(Rpy), M(CO)4(Rpy)2 (M = Mo, W, R = 2-Me, H) with a series of potentially mono- or bi-dentate uninegative (S,X)-donor ligands (S,X = xanthates, dithiocarbamates, pyridine-2-thiol, P,P-diphenyl-N-phenylphosphinothioformomido, P,P-diphenylphosphinedithioformamide) have given two types of anionic complexes; ^- and ^- (M = Mo⁰, W⁰).These anions, which contain the (S,X)-ligand as a mono- or bi-dentate group, respectively, were isolated as their tetraphenylphosphonium or triethylammonium salts.Reactions of some of these species with allyl bromide and HgX2 are described.The crystal structure of has been determined.The crystals are monoclinic, space group P2₁/n with a 14.555(4), b 12.44(1), c 17.950(2) Angstroem, U 3145.9(3) Angstroem³, Z = 4; D_c 1.65 g cm^-3, μ(Mo-K_α) 39.68 cm^-1, F(000) = 1544, R = 0.042 for 4278 observed reflections.In this complex the xanthate ligand is monodentate.