Synthesis and structural determination of two triphenyltin thiosalicylates

Abstract

Two structurally different triphenyltin complexes of thiosalicylic acid were obtained depending on the amine used. Bis(triphenyltin) thiosalicylate was obtained when diethylamine was used while dicyclohexylammonium thiosalicylatotriphenylstannate resulted with dicyclohexylamine. Their structures have been characterized by IR and multi-nuclear (¹H, ¹³C, ¹¹⁹Sn) NMR spectroscopies. In the solid state, both tins in the bis(triphenyltin) thiosalicylate complex are four-coordinate while the tin in dicyclohexylammonium thiosalicylatetriphenylstannate is five-coordinate. However, in solution, dissociation occurs in the dicyclohexylammonium thiosalicylatotriphenylstannate complex reducing the coordination of tin to four. The coordination of the tin atoms in the two triphenyltin complexes is confirmed by X-ray crystallographic studies.

Keywords:

• Crystal structure
• IR
• NMR
• Thiosalicylic acid
• Triphenyltin complexes

Acknowledgement

Financial support from the National Institute of Health Minority Biomedical Research Support Program (MBRS/SCORE, GM08005) is gratefully acknowledged.