Synthesis and crystal structures of diorganotin dicyanoethylene-1,2-dithiolate compounds and their derivatives with 4,4 ′-Bipy or Phen

Abstract

Six diorganotin(IV) compounds with dicyanoethylene-1,2-dithiolate (mnt) of the type [R 2Sn(mnt)Cl n L] · Y (when n=0, L=0: R=CH 3, Y=0, 1; R= n-Bu, Y=0, 2; R=C 6H 6, Y=0.5C 6H 6, 3; R=CH 3, Y=1.5(4,4 ′-Bipy), 4; when n=1, L=0, R=CH 3, Y=4,4 ′-Bipy, 5; when n=0, L=Phen, R=CH 3, Y=0, 6; 4,4 ′-Bipy=4,4 ′-bipyridyl; Phen=1,10-phenanthroline) are synthesized by the reaction of diorganotin dichloride and disodium maleonitriledithiolate (Na 2mnt) in the presence of 4,4 ′-Bipy or Phen. All the compounds 1– 6 are characterized by elemental, IR, 1H NMR spectroscopy and X-ray crystallography analyses. The X-ray data showed the geometries of all the tin atoms in compounds 1– 4 are tetrahedral, and those in 5 and 6 are trigonal bipyramidal and distorted octahedral, respectively. Co-crystallization is found in crystals of compounds 3 and 4. The co-crystallized solvents are benzene and 4,4 ′-Bipy, respectively. Compound 5 is a stannate with a five-coordinated tin(IV) atom. Compound 6 is a six-coordinated dimethyltin(IV) derivative from mixed ligands of mnt and Phen.