PREPARATIVE AND SPECTROSCOPIC STUDIES OF TRIORGANOSTANNO DERIVATIVES OF BIOACTIVE HETEROCYCLIC AZOMETHINES

Reactions of triphenyltinchloride and azomethine ligands having the do nor groups N OH and N SH have resulted in complexes of the types Ph3Sn (N 0) and Ph3Sn(N S), respectively. The newly synthesized complexes ha ve been characterized as monomeric non-electrolytes on the basis of mo lecular weight determinations and conductivity measurements. Infrared and multinuclear NMR spectral studies ( H-1. C-13 and Sn-119) of some complexes are consistant with the five-coordinated trigonal bipyramida l geometry for the resulting derivatives. Fungitoxicity tests for a fe w representative ligands and their metal chelates against Alternaria b rassicae, Alternaria tenuis and Aspergillus niger have been carried ou t and the growth inhibition percentage calculated on the basis of aver age diameter of the fungal colony.