Metal Complexes with Substituted Biphenyls

Abstract

Metal complexes of the type [MLX₂] where M = Co(II) Ni(II)

and Cu(II), L = 3,3´-dimethyl-4,4´-bis(benzoylthiourea) biphenyl or

3,3´-dimethyl-4,4´-bis-(thiocarbamoyl) biphenyl and X = Cl^–, Br^–,

NO^–₃ and ClO^–₄ have been isolated from the neutral medium. octahedral

geometry for the complexes has been proposed on the basis

of elemental analysis, magnetic moment and spectral studies. The

coordination of the metal ions to the ligand through sulphur and

carbamoyl oxygen atom in the case of formal ligand whereas

through sulphur and carbamoyl nitrogen atom to the later ligand

has been proposed basing on IR spectra. Fungicidal screening of

the complexes shows them to be active against Aspergillus niger,

Fusarium oxysporium and Helminthmporium oryzae.