| 摘要 |
Organotin compounds are prepared by reacting organotin hydrides with olefinically unsaturated hydrocarbons in the presence of a catalyst consisting of AlH3, a complex Al hydride e.g. LiAlH4 or Mg(AlH4)2, or an alkyl Al hydride, e.g. diisobutyl or diethyl Al hydride. The latter may be formed in situ from a trialkyl Al compound, e.g. triisobutyl or trioctyl Al. The starting materials may contain aliphatic, cycloaliphatic, or aromatic radicals, and organotin mono-, di-, or tri-hydrides may be used. 1-15 % mole of the catalyst is used, based on the tin. Reaction may be effected, e.g. in an inert solvent such as toluene, octane, cyclohexane and hydrocarbon mixtures, by mixing the reactants and catalyst and heating to 180 DEG C., or by heating the catalyst with the olefin and adding the tin hydride dropwise at the rate of its consumption. After reaction, the catalyst may be hydrolysed or oxidized and removed by shaking with water, acid, or alkali, or by fractional distillation, or the product may be distilled off and the catalyst recovered.ALSO:Organo-tin polymers are prepared by reacting a diene or triene with an organo-tin di- or tri hydride in the presence of a catalyst consisting of AlH3, a complex Al hydride, e.g. LiAlH4 or Mg(AlH4)2, or an alkyl Al hydride. The latter may be formed in situ from a trialkyl Al compound. The reactants may contain aliphatic, cycloaliphatic or aromatic radicals. Stoichiometric amounts of reactants are used, or an excess of olefin may provide the polymer with unsaturated groups. 1-15 mole per cent of the catalyst is used, based on the tin. Reaction may be effected, e.g., in an inert solvent such as toluene, octane, cyclohexane, and hydrocarbon mixtures, by mixing the reactants and catalyst and heating to 180 DEG C., or by heating the catalyst with the olefin and adding the tin hydride dropwise at the rate of its consumption. After reaction, the catalyst may be hydrolysed or oxidised and removed by shaking with water, acid or alkali, or by fractional distillation, or the product may be distilled off and the catalyst recovered. Examples describe the reaction of di-n-butyl tin dihydride with 1,2,4-trivinyl cyclohexane (Example 8), 1, 7-octadiene (9, 10 and 11), and 1, 5-cyclooctadiene (12); diethyl tin dihydride with divinyl pentene (7); isobutyl tin trihydride with 1, 7-octadiene (14); and a mixture of di-n-butyl tin dihydride and iso-butyl tin trihydride with 1, 7-octadiene.
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