The crystal and molecular structures of tris( O-ethylxanthato)-gallium(III) and indium(III)

Abstract

The crystal structures of the title compounds, Ga(S 2COEt) 3 ( 1) and In(S 2COEt) 3 ( 2) have been determined by three dimensional X-ray diffraction methods. Both compounds crystallize in the trigonal space group R 3 - with Z = 6. Cell dimensions for ( 1) are a hex 15.065(1) and c hex 13.421(1) Å and for ( 2) 15.319(3) and 13.522(4) Å. Final R. and R w values 0.044 and 0.049 for ( 1) and 0.040 and 0.037 for ( 2) for 668 and 1153 statistically significant reflections respectively. The complexes are isostructural. The metal centres are in a distorted octahedral environment, the distortion arising from the restricted bite distance of the xanthate ligands. For each compound, each xanthate moiety chelates the metal atom with similar M-S bonds.