Mononuclear five-coordinate molybdenum(IV) and -(V) monosulfide complexes coordinated with dithiolene ligands: Reversible redox of Mo(V)/Mo(IV) and irreversible dimerization of [(MoS)-S-V](-) cores to a dinuclear [Mo-2(V)(mu-S)(2)](2-) core

摘要

A mononuclear five-coordinate molybdenum(IV) monosulfide complex, (Et4N)(2)[MoS(L)(2) ] (L = cyclohexene-1,2-dithiolate) (1), was obtained and characterized by IR, UV-vis spectroscopic methods, and X-ray crystallography. 1 was oxidized by an equivalent ferrocenium cation to give the corresponding mononuclear molybdenum(V) complex, (Et4N)[MoS(L)(2)] (2), which was stable for a few minutes under a lower concentration than 0.3 mM and then further dimerized to (Et4N)(2)[Mo(L)(2)](2)(mu-S)(2) (3).