Synthesis and Structure of cis-Dioxo(3-Methoxysalicylaldehyde 4-Methylthiosemicarbazonato-N,O,S)(γ-Picoline-N) Molybdenum(VI)

Red crystals of cis-dioxo(3-methoxysalicylaldehyde 4-methylthiosemicarbazonato-N,O,S)(gamma-picoline-N)-molybdenum(VI), [MoO(2)L(gamma-pic)], [L(2-)=CH(3)OC(6)H(4)(O) CH=NN=C(S)NHCH(3), 3-methoxysalicylaldehyde 4-methylthiosemicarbazonato] were prepared by the reaction of [MoO(2)L](n) with gamma-picoline in dry methanol. The title compound crystallized in the monoclinic space group P2(1)/n, a = 6.7984(7) angstrom, b = 15.9760(12) angstrom, c = 17.1466(14) angstrom, beta = 93.613(8)degrees, V = 1858.6(3) angstrom(3), Z = 4. The coordination geometry around the molybdenum center is distorted octahedral with the tridentate thiosemicarbazonato ligand (L(2-)) bonded meridionally to the [MoO(2)](2+) core. The sixth coordination site is occupied by a weakly bound gamma-picoline molecule. The adjacent molecules are joined by the N-H center dot center dot center dot O hydrogen bonds between their amino and methoxy groups thus forming infinite molecular chains. The three-dimensional solid-state structure is achieved by the additional C-H center dot center dot center dot O, C-H center dot center dot center dot pi and van der Waals interactions.