A novel route for the preparation of dimeric tetraorganodistannoxanes

Autor:	Fong Sheen Kuan, Edward R. T. Tiekink, Dainis Dakternieks, Jens Beckmann
Rok vydání:	2002
Předmět:	Aqueous solution Organic Chemistry Halide chemistry.chemical_element Crystal structure Biochemistry Inorganic Chemistry Crystallography Oxygen atom chemistry X-ray crystallography Materials Chemistry Physical and Theoretical Chemistry Substitution mechanism Tin
Zdroj:	Journal of Organometallic Chemistry. 659:73-83
ISSN:	0022-328X
DOI:	10.1016/s0022-328x(02)01705-9
Popis:	The reaction of polymeric diorganotin oxides, (R2SnO)n (R=Me, Et, n-Bu, n-Oct, c-Hex, i-Pr, Ph), with saturated aqueous NH4X (X=F, Cl, Br, I, OAc) in refluxing 1,4-dioxane afforded in high yields dimeric tetraorganodistannoxanes, [R2(X)SnOSn(X)R2]2, and in a few cases diorganotin dihalides or diacetates, R2SnX2. The reported method appears suitable for the synthesis of fluorinated tetraorganodistannoxanes. Identification of [R2(OH)SnOSn(X)R2]2 (R=n-Bu; X=Cl, Br) and [R2(OH)SnOSn(X)R2] [R2(X)SnOSn(X)R2] suggest a serial substitution mechanism starting from [R2(OH)SnOSn(OH)R2]2. X-ray crystal structure determinations are reported for [Me2(AcO)SnOSn(OAc)Me2]2 (29a), [i-Pr2(Br)SnOSn(Br)i-Pr2]2 (20a), [c-Hex2(F)SnOSn(F)c-Hex2]2 (5a) and [c-Hex2(F)SnOSn(Cl)c-Hex2]2 (36), respectively. These show the presence of a central (R2Sn)2O2 core that is connected, via the oxygen atoms, to R2Sn entities. Acetate (29a) or halides (5a, 20a, 36) complete the coordination about the tin centres.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c97be464140d1e6b0e2ac7563d70abe2 https://doi.org/10.1016/s0022-328x(02)01705-9 Zobrazit plný text záznamu Full Text from ScienceDirect