Metalloligands-II :Studies on some homo/hetero trinuclear transition metal complexes of 4,5,8,9-tetraza-1,3,10,12tetramethyl-L, 12-dioxo-6,7 -diphenyl1,3,5,7,9,11-dodecahexane (TTDD) with nickel(II), cobalt(II) and copper(II)

Abstract

A new series of homo/hetero trinuclear complexes of the type [M Cu M (TTDD)₂X₂(H₂O)₄]; where M=nickel(II),cobalt(ll) and copper (ll), X = Cl^-, Br^- and NO<img src='/image/spc_char/3_bar.gif' border=0> and TTDD = 4,5,8,9-tetraza-1,3,10,12-tetramethyl-1,12-dioxo-6,7-diphenyl-1,3,5,7,9, 11-dodecahexene have been prepared in a stepwise reaction from the precursor copper bis(benzil dihydrazone) complexes. They have been characterised on the basis of elemental analysis, spectral and magnetic properties, conductivity measurements and thermal analyses. All the complexes contain coordinated water and are non-electrolytes. An octahedral environment around the metal centre is proposed. Several spectral parameters have also been calculated. The complexes are screened as possible fungicides.