SYNTHESIS AND CHARACTERIZATION OF DIORGANOTIN COMPOUNDS CONTAINING SILICON AND GERMANIUM AND CRYSTAL STRUCTURE OF PRECURSOR CARBOXY-ETHYLTRICHLOROGERMANIUM

Abstract

Eight compounds of general formula [R¹(CH₃)₂SiCH₂]₂Sn- [O₂CCH₂(R²)CHGeR³ ₃]₂ [R¹ = CH₃, C₂H₅; R² = C₆H₅, C₆H₄OMe-3/4, R³ = CH₃, N(CH₂CH₂O)₃] have been synthesised from [R¹ (CH₃)₂SiCH₂]₂SnCl₂ and R³ ₃GeCH(R²)CH₂CO₂H in the presence of triethylamine. (Me₃CCH₂)₃SnO₂CCH₂(R¹)CHGe(R²)₃ [R¹ = C₆H₅, C₆H₄OMe-3; R² = N(CH₂CH₂O)₃] have been synthesised similarly from (Me₃CCH₂)₃SnCl. The compounds have been characterised by ¹H, ¹³C, ²⁹Si and ¹¹⁹Sn NMR. The structure of a precursor, Cl₃GeCH(Ph)CH₂CO₂H, has been re-determined and shown to be a hydrogen-bonded dimer rather than a monomer as previously described.

ACKNOWLEDGMENT

M. Mazhar is thankful to the Pakistan Science Foundation for financing the project, to Professor T. N. Mitchell, University of Dortmund, Germany, for gifts of chloromethyltrimethylsilane, tris(neopentyl)tin bromide and germanium dioxide. M. A. Choudhary is grateful to the University of Azad Jammu & Kashmir, Muzaffarabad, for granting a study leave.