2767-47-7Relevant academic research and scientific papers
INTERACTION OF DIMETHYLTIN SULFIDE WITH 1,2-DIBROMOETHANE. CRYSTAL STRUCTURE OF THE DIMETHYLTIN DIBROMIDE/1,4-DITHIANE COMPLEX
Shcherbakov, V. I.,Grigor'eva, I. K.,Razuvaev, G. A.,Zakharov, L. N.,Bochkova, R. I.,Struchkov, Yu. T.
, p. 41 - 48 (1987)
Reaction between trimeric dimethyltin sulfide and 1,2-dibromoethane at 140 degC results in a complex of dimethyltin dibromide with 1,4-dithiane formulated as: Me2SnBr2*SC2H4C2H4S*Me2SnBr2.X-ray analysis of the crystal structure of this complex has been performed.
Synthesis of Boron-Halogenated Diborylamines and Diborylhydrazines by Cleavage of Stannazanes
Diemer, Stefan,Noeth, Heinrich,Storch, Wolfgang
, p. 1765 - 1780 (2007/10/03)
The diborylamines R'-N(BRX)2 (3; X=Cl, Br) are obtained by stannazane cleavage of distannylorganylamines R'-N(SnMe3)2 (4) with alkyldihaloboranes RBX2 in a 1:2 molar ratio. The presence of the sterically demanding substituents R and R' also causes carbon-tin bond cleavage, resulting in low yields of 3. However, carbon-tin bond cleavage can be suppressed by the use of bis(dimethylchlorostannyl)organylamines 5 as the nitrogen source for the synthesis of diborylamines. This results in almost quantitative yields of the compounds 3. Treatment of the distannylhydrazines R2N-N(SnMe3)2 (7) with RBX2 in a 1:2 molar ratio leads to the formation of N,N-bis(alkylhaloboryl)hydrazines 8 under mild conditions and in good yield. The molecular structures of 3 and 8 were determined by multinuclear magnetic resonance spectra in solution as well as by X-ray structure analysis in the case of 8d. A typical structural feature of 8d is the intramolecular BN adduct formation. Support for the constitutions of compounds 8c comes from MS fragmentation patterns as well as from IR spectra.
Selective and sequential reduction of polyhalosilanes with alkyltin hydrides
D'Errico, John J.,Sharp, Kenneth G.
, p. 2177 - 2180 (2008/10/08)
The reactions between alkyltin hydrides and a variety of polyhalo- and mixed halosilanes have been investigated. For SiCl4 and SiCl3H, the reductions proceed in a stepwise manner to yield the monoreduced species as the major products. The reduction of SiBr4 occurs much faster to yield a mixture of SiBr3H and SiH4, or, in the vapor phase, SiBr3H as the sole product. SiF3X (X = Br, Cl) is converted into SiF3H, with no further reduction of SiF3H observed upon addition of a second equivalent of alkyltin hydride. SiF2HX compounds (X = Br, Cl) are obtained from SiF2X2 and are converted into SiF2H2 with excess Me3SnH. Redistribution becomes competitive with reduction in reactions between Me3SnH and SiFBr3, leading to mixtures of SiH4, SiF2H2, and SiF3H. The major products in the reaction between SiCl2Br2 and Me3SnH are SiCl3H and SiH4 (no SiCl2H2 was observed). Several probable intermediates were independently synthesized and allowed to react with Me3SnH. Together with deuterium labeling experiments, these reactions shed light on the mechanisms involved in these systems. In particular, the reactions appear not to proceed via free radicals.
Contributions to the Chemistry of Boron, 167. Synthesis of Diazadiboretidines, Borazines, and Octahydrotetrazatetraborocines via Stannazane Cleavage Reactions
Franz, Thomas,Hanecker, Elisabeth,Noeth, Heinrich,Stoecker, Walter,Storch, Wolfgang,Winter, Gerhard
, p. 900 - 916 (2007/10/02)
Diazadiboretidines 2 are obtained from the diazadistannetidine 1 or 2NC(CH3)3 by Sn-N cleavage with boron halides RBX2 (R = CH3, C2H5, CH(CH3)2, C6H5, Cl, X = Cl, Br).Borazines 15 are formed, however, by Sn-N cleavage of 2NC(CH3)3 (12) with RBX2 (except with (CH3)2HCBCl2) in a 1:1 ratio. (Stannylamino)boranes are NMR detectable intermediates. - The diazadiboretidines 2 2b - d (R = C2H5, CH(CH3)2, C6H5) do not dimerize in contrast to 2a (R = CH3).The equilibrium constant has been determined for the equilibrium 2a 6, the formation of the dimer obeying a second order rate law. 2 (2e) is metastable at -20 deg C.It forms 4 (8) irreversibly at 20 deg C. - 6 crystallizes in the monoclinic system, space group P21/c.The tubshaped molecule possesses alternating single and double BN bonds (BN: 1.516, 1.404 Angstroem).
Electrophilic cleavages in (CH3)3SnCH2M(CH3)3 (M = Sn, Ge, Si, C). 1. Product distribution
Hawker, Darryl W.,Wells, Peter R.
, p. 821 - 825 (2008/10/08)
The extent to which Sn-CH2 and/or Sn-CH3 cleavage occurs in (CH3)3SnCH2M(CH3)3 (M = Sn, Ge, Si) in reactions with several electrophiles has been determined. With iodine and with
DESULPHURIZATION OF SULPHUR-CONTAINING ORGANOMETALLIC COMPOUNDS
Razuvaev, G.A.,Shcherbakov, V.I.,Grigor'Eva, I.K.
, p. 245 - 252 (2007/10/02)
Desulphurization reactions of trialkyl- and dialkyl-tin sulfides with a variety of reagents such as acyclic peroxides, salts and organic derivatives of some metals, halogen alkanes, as well as with sulphur acceptors such as copper powder or triphenylphosphine are discussed.
Geminal bis(haloorganostannanes) and their complexation as mono- and bidentate Lewis acids with dimethyl sulfoxide
Karol, Thomas J.,Hutchinson, John P.,Hyde, Jeffrey R.,Kuivila, Henry G.,Zubieta, Jon A.
, p. 106 - 114 (2008/10/08)
Six (chloromethylstannyl)methanes with structures CH2(SnMenCl3-n)(SnMemCl 3-m) with n = 0-3 and m = 0-2 have been prepared by chlorine-methyl exchange from bis(trimethylstannyl)methane or bis-(trivinylstannyl)methane. Four 2,2-bis(chloromethylstannyl)propanes have been similarly prepared from 2,2-bis(trimethylstannyl)propane. Correlations between 1H and 13C magnetic resonance parameters have been examined. The effects of dimethyl sulfoxide (Me2SO) on the 1H NMR parameters of the chloro stannanes have been examined as a source of information on complexation. Seven complexes with Me2SO have been prepared, and the structures of CH2(SnMeCl2)-(SnMe2Cl)(Me5SO) λ4, CH2(SnMeCl2)2(2Me2SO) λ5, and CH2(SnCl3)2(4Me2SO) λ7 have been determined by X-ray diffraction. In the first of these, the oxygen of the Me2SO bridges the two tins which display distorted trigonal-bipyramidal geometry; in the second, the oxygens of each Me2SO act as bridges between the tins which display distorted octahedral geometry; in the third, the oxygens do not bridge and the CH2 group serves as a common apex for the octehedra of two hexacoordinate tins. Pertinent features of the structures are discussed. Compound 4 crystallizes in the space group P1 with a = 7.551 (2) A?, b = 7.945 (2) A?, c = 13.354 (3) A?, α = 80.63 (2)°, β = 89.13 (2)°, γ = 72.96 (2)°, and Z = 2. The structure solution and refinement were based on 1609 reflections with Fo > 6σ(Fo) to give a discrepancy factor of 0.045. Compound 5 crystallizes in the orthorhombic space group Pbnm with a = 9.821 (2) A?, b = 12.411 (2) A?, c = 15.540 (3) A?, and Z = 4. Refinement based on 1109 reflections with Fo > 6σ(Fo) converged at 0.048. Compound 7 crystallizes in the monoclinic space group C2/c with a = 20.998 (5) A?, b = 7.925 (3) A?, c = 16.535 (4) A?, β = 98.79 (3)°, and Z = 4. Refinement using 1277 reflections with Fo, > 6σ(Fo) yielded R = 0.034.
