BIS (2-THIO-5-NITROPYRIDINE)-S-DI-NORMAL-BUTYLSTANNANE(IV) - CRYSTAL-STRUCTURE AND SPECTROSCOPIC STUDIES

X-Ray analysis has defined the crystal structure of the title compound. The crystals are monoclinic and belong to the space group C2/c with cell dimensions, a = 21.731(8), b = 14.141(6), c = 7.648(5) A ̊, β = 100.04(5) and Z = 4. The complex molecule has C2 symmetry; the S and C atoms bonded to the Sn form a distorted tetrahedral arrangement around the latter, with SnS and SnC bond distances of 2.477(3) and 2.162(11)Å respectively. There is a short intramolecular contact between the Sn and N in the pyridine ring, of 2.77(1)Å. IR and NMR spectral data have been interpreted on the basis of the X-ray structure; mass spectral data is predominantly influenced by strong tin-ligand bonding, reflecting a contribution by the Sn..... N interaction. © 1979.