title: Mono(maleonitriledithiolene)molybdenum(IV) and bis(μ-sulfido)-bridged dimolybdenum(V) complexes with Mo=S moiety.
abstract: Mono(maleonitriledithiolene)sulfidomolybdenum(IV) complex, [MoS(S(4))(mnt)](2-) (2; mnt=maleonitriledithiolene) was synthesized by the substitution reaction of a tetrasulfido ligand of the known [MoS(S(4))(2)](2-) (1) upon reaction with one or even excess equivalent of Na(2)(mnt) in aqueous MeCN solution in air. Surprisingly, 2 undergoes dimerization on treatment with alkyl halide such as MeI and PhCH(2)Br to form bis(μ-sulfido)dimolybdenum(V) species, [{MoS(mnt)}(2)(μ-S)(2)](2-) (3). These complexes have been characterized by IR, UV/VIS spectroscopy, cyclic voltammetry, elemental analysis, and by X-ray crystal-structure analysis. Differences in the relative stability and electrochemical behavior of 1, 2, and 3 have been correlated with theoretical calculations at DFT level.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India.
authors.forename: Moumita
authors.initials: M
authors.lastname: Bose
authors.forename: Golam
authors.initials: G
authors.lastname: Moula
authors.forename: Sabyasachi
authors.initials: S
authors.lastname: Sarkar
mesh_terms: D018360:Crystallography, X-Ray; D008958:Models, Molecular; D008982:Molybdenum / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D010084:Oxidation-Reduction; D011789:Quantum Theory; D013057:Spectrum Analysis; D013438:Sulfhydryl Compounds / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D013438:Sulfhydryl Compounds; C459462:maleinitriledithiolate; D008982:Molybdenum