16892-66-3Relevant academic research and scientific papers
Molecular structures of trimeric diphenyltin chalcogenides, (Ph2SnE)3, E = S, Se, Te
Lange, Heike,Herzog, Uwe,B?hme, Uwe,Rheinwald, Gerd
, p. 43 - 49 (2007/10/03)
The trimeric diphenyltin chalcogenides (Ph2SnE)3 (E=S (1), Se (2), Te(3)) have been synthesized by reaction of Ph2SnCl2 with Li2E and characterized by multinuclear NMR spectroscopy (1H, 13C, 119Sn, 77Se and 125Te) as well as crystal structure analyses. The three compounds crystallize in the monoclinic space group P21/n and show central six-membered rings Sn3E3 in twisted boat conformations. For 1 density functional theory (DFT) calculations at the B3LYP/6-31G* level of theory have revealed the twisted boat conformation as the global minimum. Additionally a boat conformation (+3.4 kJ mol-1) and a chair conformation (+7.9 kJ mol-1) have been calculated. The mutual repulsion of the phenyl rings in the chair conformation is also evident from the increased bond angles of the Sn3S3 ring in 1.
Thiastannacyclohexanes (R2SnS)3 and -adamantanes (RSn)4S6: Syntheses, Properties, and Structure
Berwe, Hermann,Haas, Alois
, p. 1175 - 1182 (2007/10/02)
Cyclotristannathianes (4) are obtained from R2SnCl2 (1) and Na2S*9H2O or (CH3)3SiSSi(CH3)3.Analogously, hexathiatetrastannaadamantanes are prepared from RSnCl3(2) and the sulfenylating agents mentoined before.The reaction between dimesityltin dichloride (1a) and Na2S*9H2O depending on the reaction conditions yields either the corresponding dithiadistannacyclobutane (3) or cyclotristannathiane 4a.The structure of the cyclostannathianes 3, 4, and 5 are elucidated by determining the intensity ratio of geminal 119Sn-117Sn couplings.Calculated data are confirmed by experimental values.Additional proof is provided by measuring the change of intensity ratio in the 117Sn-NMR spectrum of 4c.X-ray structure determination proved for (C6F5Sn)4S6 (5g) to have the same geometry as in solution.
