SYNTHESIS, CHARACTERIZATION, AND REACTION CHEMISTRY OF [2-(2-PYRIDYL)ETHYL]]TRIPHENYLTIN(IV), [2-(4-PYRIDYL)ETHYL]TRIPHENYLTIN(IV) AND [2-(2-OXO-N-PYRROLIDINYL)ETHYL]TRIPHENYLTIN(IV)

The compounds Ph3SnR [R = (CH2)2C5H5N-2 (1), (CH2)2C5H5N-4 (2), and (CH2)2C3H6C(O)N-2 (3)] have been synthesized by hydrostannylation of 2- or 4-vinylpyridine and N-vinylpyrrolidin-2-one, respectively, with Ph3SnH. Reaction of 1-3 with 1 equiv of X2 (X = Br, I) gives Ph2RSnX, which have been used to synthesize representative compounds of general formula Ph2RSn(L), L = S2CNR'2 (R' = Me, Et) or O2CR' (R' = Me, Ph). The structures of the compounds are discussed on the basis of their H-1, C-13, Sn-119 NMR and Sn-119 Mossbauer data. The structure of Ph2Sn[(CH2)2C5H5N-2](S2CNMe2) has been determined by X-ray crystallography: C22H24N2S2Sn, fw 499.28, a = 9.611 (4) angstrom, b = 10.255 (3) angstrom, c = 12.896 (9) angstrom, a = 75.35 (4)-degrees, beta = 70.97 (4)-degrees, gamma = 68.09 (3)-degrees, V = 1102.2 angstrom3, Z = 2, space group P1BAR, rho(calc) = 1.50 g cm-3, mu(Mo Kalpha) = 12.42 cm-1, lambda(Mo Kalpha) = 0.710 69 angstrom, F(000) = 504, R = 0.0492, R(w) = 0.0542 for 2133 unique data. The tin is in a five-coordinate, trigonal bipyramidal trans-NSSnPh2R environment, with nitrogen and sulfur in the axial positions. The 2-ethylpyridyl ligand chelates the metal, while the dithiocarbamate is monodentate.