Synthesis, molecular structure, and isomerisation in solution of (Me3SbS)2Me2SnCl2. Concomitant hypercoordination of tin and antimony

The reaction of Me₃SbCl₂ and (Me₂SnS)₃ afforded the complex (Me₃SbS)₂Me₂SnCl₂ in high yields, whose molecular structure features both hypercoordinated tin and antimony atoms. In solution, (Me₃SbS)₂Me₂SnCl₂ undergoes a reversible dissociation and ligand interchange reaction to give Me₃SbS, Me₃SbCl₂ and (Me₂SnS)₃.

The utility of hypercoordination and secondary bonding for the synthesis of a binary organoelement oxo cluster

A strategy for the preparation of the otherwise difficult to obtain binary organometallic oxides containing two heavy main group elements is described and exemplified by the synthesis of [(p-MeOC₆H₄)₂Te(OSnt-Bu₂OH)₂]₂.

Hypercoordinated organotin compounds containing sulfur and chlorine. Molcular structures of [(Ph3P)2N]+[S(SnR2Cl)2Cl]- (R=Me, t-Bu)

The reaction of diorganotin sulfides, cyclo-(R₂SnS)_n (R=Me, n-Bu; n=3; R=t-Bu; n=2) with the corresponding diorganotin dichlorides, R₂SnCl₂, provided the tetraorganodistannathianes, (R₂ClSn)₂S (1, R=Me; 2, R=n-Bu; 3, R=t-Bu). ¹H-, ¹³C-, and ¹¹⁹Sn-NMR studies indicate that these compounds are kinetically labile and in equilibrium with the starting materials. Addition of equimolar amounts of [(Ph₃P)₂N]Cl to the reaction mixtures gave the chloride complexes [(Ph₃P)₂N]⁺[S(SnR₂Cl)₂Cl]⁻ (4, R=Me; 5, R=n-Bu; 6, R=t-Bu). Single-crystal X-ray diffraction studies revealed the tin atoms in both 4 and 6 to adopt distorted trigonal bipyramidal configurations with the chlorine atoms occupying the axial positions.

Observation of inter- and intramolecular C---H...F hydrogen bonding in Gingras' salt: [n-Bu4N]+[Ph3SnF2]-

The crystal and molecular structure of Gingras' salt [n-Bu₄N]^₊ [Ph₃SnF₂]⁻ is reported, which reveals a variety of inter- and intramolecular C---H...F hydrogen bonding interactions. A ¹¹⁹Sn MAS-NMR spectrum was recorded and a tensor analysis has been performed according to the method of Herzfeld and Berger. The results are discussed in terms of the molecular structure and are compared with the parent compound Ph₃SnF as well as with Mes₃SnF (Mes=mesityl).