Synthesis of (Me3SiCH2Sb)n and reactions with ditellurides: crystal structure of

Article abstract of DOI:10.1016/0022-328X(95)05621-U

Substitution of phenyl groups in Ph2SbR (1) (R=Me3SiCH2) with chlorine atoms leads to RSbCl2 (2).Reduction of 2 with magnesium in tetrahydrofuran gives red crystals of (RSb)n (3) and a black solid containing the polymer (RSb)x.Solutions of 3 in C6D6 are yellow.They consist of an equilibrium mixture of (RSb)5 and (RSb)4.The reaction between 2 and cobaltocene in tetrahydrofuran or C6D6 leads to the polymer (RSb)x and to the salt ^+- (4).The structure of 4 has been determined by single-crystal X-ray diffraction.It contains a centrosymmetric double-bridged dimeric anion.The ditellurostibane RSb(Te-p-Tol)₂ (5) has been obtained with a quantitative yield through a complete reaction between 3 and (p=TolTe)₂.Compound 5 has been detected in the product mixtures resulting from reactions of polymeric (RSb)x with (p-TolTe)₂ or by reducing p-TolTeCl3 and RSbCl2 with magnesium in tetrahydrofuran.Keywords: Antimony; Tellurium; X-ray structure