First row transition metal complexes of benzyl N′-(2-methoxybenzoyl)hydrazinecarbodithioate (H2mbhcd): X-ray structures of [Mn(Hmbhcd)2(o-phen)] · DMSO and [Mn2(Hmbhcd)2(2,2′-bpy)2(μ-OAc)2]

The ligand benzyl N′-(2-methoxybenzoyl)hydrazinecarbodithioate (H2mbhcd) (1), having a NOS donor sequence, formed a series of complexes [M(Hmbhcd)2]n {M = Mn(II), Co(II) and Ni(II) (2, 5 and 6)}, [Mn(Hmbhcd)2(o-phen)] · DMSO (3) and [Mn2(Hmbhcd)2(2,2′-bpy)2(μ-OAc)2] (4). The complexes 3 and 4 have been obtained as single crystals, containing o-phen/2,2′-bpy as coligands. The compounds 2, 5 and 6 have been characterized with the aid of elemental analyses, IR, UV–Vis, magnetic susceptibility and mass spectrometry. Compound 3 crystallized in the triclinic system with the space group P  1¯ while 4 crystallized in the monoclinic system with the space group P21/c. The (N,O) donor sites of the uninegative bidentate ligand chelates the Mn(II) center to form a five-membered MnOCN2 ring in both complexes 3 and 4.

Complexes of the types [M(Hmbhcd)2]n {M = Mn(II), Ni(II) and Co(II)} (2, 5 and 6), [Mn(Hmbhcd)2(o-phen)] · DMSO (3) and [Mn2(Hmbhcd)2(2,2′-bpy)2(μ-OAc)2] (4) with H2mbhcd = benzyl N′-(2-methoxybenzoyl)hydrazinecarbodithioate have been synthesized and characterized by spectroscopic methods. The X-ray studies of 3 and 4 indicate that the ligand acts as a uninegative bidentate ligand, forming a five-membered chelate ring.Figure optionsDownload as PowerPoint slide