Syntheses and crystal structures of di- and triorganotin derivatives with 2,5-dimercapto-1,3,4-thiodiazole

A series of organotin(IV) complexes with 2,5-dimercapto-1, 3, 4-thiodiazole (HHdmt) of the type (R_nSnCl_m)₂(dmt) (m=0, n=3, R=Ph 1, PhCH₂2, n-Bu 3; m=1, n=2, R=Ph 4) and [R₂Sn(dmt) · L]_n (L=0.5C₆H₆, R=CH₃5; L=0, n=5, R=n-Bu 6) have been synthesized. All complexes 1-6 were characterized by elemental analysis, IR, ¹H and ¹³C NMR spectra. And except for 3, complexes 1, 2, 4, 5 and 6 were also determined by X-ray crystallography. The tin atoms of complexes 1, 2, 3 and 4 are all five-coordinated. The geometries at tin atoms of 1, 2, 3 and 4 are distorted trigonal bipyramidal. The tin atoms of complexes 5 and 6 are six-coordinated and their geometries are distorted octahedral.