Partial double bond character in chalcogen compounds of stanna-closo-dodecaborate

Abstract

The following chalcogen compounds of stanna-closo-dodecaborate were synthesized and characterized: the tetrameric oxide [(O–SnB₁₁H₁₁)₄]⁸⁻ from the reaction with hydrogen peroxide and the sulfide and selenide [S–SnB₁₁H₁₁]²⁻, [Se–SnB₁₁H₁₁]²⁻ from the reaction with elemental sulfur and selenium, respectively. The stannaborate derivatives were characterized by ¹¹⁹Sn Mössbauer spectroscopy and single crystal structural analysis. The character of the bond between the tin and group 16 elements was studied extensively by using quantum chemical methods.