Complexes of Zn-II, Cd-II and Hg-II with tetradentate Schiff bases derived
from 3-aminomethyl-4-amino-5-mercapto-1,2,4-triazole and substituted salicy
laldehyde of the type ML (where L is doubly deprotonated ligand) have been
synthesised. All the complexes are coloured and non-electrolytes. A four-co
ordinate environment is proposed for metal ion.