Stannoboroxanes: II. Synthesis and reactions of tris(trialkyltin) borates

Tris(trialkyltin) borates B(OSnR3)3 (R = Me, Et, Pr, Bu, i-Bu and Ph) have been prepared by esterification of boric acid with trialkyltin hydroxide or bis(trialkyltin) oxide. These reacted with boric anhydride to give the corresponding trialkyltin metaborates (R3SnOBO)3. Reactions of tris(tributyltin) borate with hydrogen chloride, acetyl chloride, acetic acid, acetic anhydride, phenol, butanethiol, thiophenol and isopropyl acetate have been studied. The infrared spectra of these compounds are discussed