Synthesis of New Tin(IV) Complexes and Crystal Structure of [(i-Pr)2NH2][(PhCH2)3Sn(μ2-SCH2COO)]

Abstract

Abstract: The study of ionic organotin compounds is of current attention due to their diversified molecular structures and wide range of applications, such as biological activities and as catalysts in organic synthesis. In our preivous studies, a series of ionic organotin complexes was synthesized by the reaction of organotin chloride with organic acid in the present of an organic base. In the reaction of triphenyltin chloride and mercaptoacetic acid in the presence of an organic base, an unexpected tin-carbon cleavage process was observed; while the reaction of mercaptoacetic acid with diphenyltin dichloride or phenyltin trichloride in the presence of organic base generated no Sn—C cleavage products. Our interest in the mechanism of the tin-carbon cleavage of organotin induced by ligand containing S has prompted us to investigate the reaction of organotin choride in some details. With this in mind, a series of new ionic organotin(IV) complexes with general formula [Q][(PhCH2)3Sn(μ2-SCH2COO)][Q=diethylammonium(1), di-i-propylamrnonium(2), tripropylammonium(3), tri-n-butylammonium(4), methylphenylammonium(5)] was synthesized by the reaction of mercaptoacetic acid with tribenzyltin chloride in the presence of an organic base in this paper. These complexes were characterized by elemental analysis, IR and 1H NMR spectroscopies. The crystal structure of [(i-Pr)2\5NH2][(PhCH2)3Sn(μ2-SCH2COO)] was determined by X-ray crystallography. The structure consists of an anion part, in which the tin atom has a cis-tbp geometry with the O atom and C atom occupying the axial postions, and a tri-n-propylammonium cation part; these two parts are connected through a hydrogen bond between the N atom in the ammonium and the O atom of the carbonyl group with a N—O length of 0.2827 nm.

Key words: Five-coordinated organotin(Ⅳ) complex, Ionic organotin, Crystal structure

TrendMD:

ZHONG Gui-Yun*, SUN Li-Juan, XIE Qing-Lan. Synthesis of New Tin(IV) Complexes and Crystal Structure of [(i-Pr)2NH2][(PhCH2)3Sn(μ2-SCH2COO)][J]. Chem. J. Chinese Universities, 2010, 31(11): 2218.

References

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