Synthesis and characterization of diorganotin(IV) derivatives of 2‐mercaptopyridine and crystal structure of diphenyl pyridine‐2‐thiolatochlorotin(IV)

Abstract

Abstract Diorganotin(IV) derivatives of 2‐mercaptopyridine (HSPy), R 2 Sn(SPy) 2 , R 2 SnCl(SPy) (R = Me, iPr, nBu, tBu, Cy, Ph) and Cy 2 SnBr(SPy), were obtained from R 2 SnX 2 (X = Cl, Br) and NaSPy. Ph 2 SnCl(SPy) crystals, as determined by singlecrystal X–ray diffraction, are monoclinic in the space group P 2 1 /n. Tin forms with the bidentate SPy ligand a four–membered chelate ring with a short NSnS bite angle of 64.8(1)° leading to a heavily distorted trigonal–bipyramidal environment about tin. Apical Cl–Sn–N angle = 156.1(1)° equatorial C–Sn–C angle = 121.9(2)°. From 119 Sn Mössbauer and IR data, analogous structures are inferred for the other solid compounds R 2 SnX(SPy), and distorted octahedral molecular structures for the solid compounds R 2 Sn(SPy) 2 with R in the trans position, and sulfur atoms and nitrogen–donor atoms each in cis positions. According to IR and 1 H, 13 C and 119 Sn NMR data, the solid–state molecular structures are retained in chloroform solution.