Organotin biocides. X. Synthesis,structure and biocidal activity of organotin derivatives of 2-mercaptobenzothiazole, 2-mercaptobenzoxazole and 2-mercaptobenzimidazole

Ten organotin derivatives of 2-mercaptobenzothiazole (Hmbt), 2-mercaptobenzoxazole (Hmbo) and 2-mercaptobenzimidazole (Hmbi) have been synthesised and thier structures characterised by spectroscopic methods. Triorganotin derivatives are all S-bonded to the ligand and four-coordinate at tin except Bu₃Sn(mbo) which is five-coordinate trans-ONSnR₃ polymer at 78K. The crystal structure of Cy₃Sn(mbt) has been determined and confirms the tetrahedral geometry at tin. Bu₂Sn(mbt)₂ is weakly six-coordinate by N,S chelating ligands. Biocidal activity patterns are presented for Cy₃Sn(mbt), Ph₃Sn(mbt) and Ph₃Sn(mbo).