Synthesis, characterization and spectroscopic studies of a new ligand [N′-(2-methoxybenzoyl)hydrazinecarbodithioate] ethyl ester and its Mn(II) and Cd(II) complexes: X-ray structural study of Mn(II) complex

A new dithioligand [N′-(2-methoxybenzoyl)hydrazinecarbodithioate] ethyl ester (H2mbhce, 1) formed complexes [M(Hmbhce)2]n {M = Mn(II), Cd(II)} which have been characterized with the help of elemental analyses, magnetic susceptibility measurements, IR, UV–Vis, 1H and 13C NMR and mass spectrometry. [Mn(Hmbhce)2]n (2) crystallized in monoclinic system with space group P21/n. In the polymeric structure of 2, the ligand acts as an uninegative tridentate N(1), O(1), S(3) donor and forms a five membered chelate ring with N(1), C(2) and O(1). The intermediate bond lengths (between single and double bond distances) O(1)–C(2) = 1.241(3), N(2)–C(2) = 1.325(3), N(1)–N(2) = 1.393(2), N(1)–C(8) = 1.311(3) Ǻ and C(8)–S(3) = 1.704(2) Å suggest considerable delocalization of charge which develops slightly aromatic character in the chelate ring.

Complexes of the types [M(Hmbhce)2]n {M = Mn(II), Cd(II)} with a new ligand, H2mbhce = [N′-(2-methoxy-benzoylhydrazinde]scarbodithioic acid ethyl ester have been synthesized and characterized. X-ray study of [Mn(Hmbhce)2]n indicates, the ligand acts as an uninegative, tridentate forming five membered chelate ring. The intermediate bond distances in the chelate ring suggest delocalization of charge and support the development of aromaticity in the chelate ring.Figure optionsDownload as PowerPoint slide