Crystal structures of diaquadi-μ-hydroxido-tris[trimethyltin(IV)] diformatotrimethylstannate(IV) and di-μ-hydroxido-tris[trimethyltin(IV)] chloride monohydrate

Abstract

The title compounds are partially condensed products of hydrolysed tri­methyl­tin chloride. In the two structures, short cationic tris­tannatoxanes (C9H29O2Sn3) are bridged by a diformatotri­methyl­tin anion or a chloride anion.

CO2 Derivatives of Molecular Tin Compounds. Part 2: Carbamato, Formato, Phosphinoformato and Metallocarboxylato Complexes

“…Ph and OEt substituents are omitted for clarity (Os blue, Sn light blue, O red, P orange, C grey, H white). In 2016, Strohmann et al published the crystal structure of diaquadi-µ-hydroxidotris[trimethyltin(IV)] diformatotrimethylstannate(IV), [(Me 3 Sn) 3 (µ-OH) 2 (H 2 O) 2 ][Me 3 Sn {OC(O)H} 2 ] (12), obtained as byproduct from trapping reactions with trimethyltin chloride and formed from atmospheric CO 2[66]. The structure of 12 consists of a short trimethyltin hydroxide chain (tristannoxane), positively charged, and a bisformatostannate, negatively charged (Figure 15).…”

“…Molecular structure of 12, adapted from[66] (MERCURY view). Hydrogen atoms of methyl groups are omitted for clarity (Sn light blue, O red, C grey, H white).Lately, in 2017, Jones et al reported the efficient and highly selective use of the twocoordinate amido-tin(II) hydride complex, LSnH (L = -N(C 6 H 2 -i-Pr{C(H)Ph 2 } 2 -4,2,6)(Sii-Pr 3 )), acting as catalytic species for the reductive hydroboration of CO 2 into methanol equivalents, MeOBR 2 (2-methoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane and catecholatoboryl methoxide), using boranes, HBR 2 , as hydrogen sources[67].…”