Stability and Antimicrobial Studies of Some Transition Metal Chelates of N,N'-bis(salicylidehyde)-1,8-Naphthalenediamine

Abstract

Stability constant values of metal chelates of the ligand N,N'-bis(salicylidehyde)-1,8-naphthalenediamine with Mn(II), Fe(III), Co(II), Ni(II) and Cu(II) have been determined pH-metrically at 25 ± 0.5°C and at a constant ionic strength (0.1 M) in 75 : 25 (v/v) dioxanewater medium. The formation constants have been calculated using the Bjerrum half`n integral method. Antimicrobial studies of the ligand as well as its metal chelates were determined against both the Gram-positive as well as Gram-negative microorganisms by disc diffusion method.