本文介绍了四(α—二茂铁基、乙基、环戊二烯基)钛,二环戊二烯基、二(α—二茂铁基、乙基、环戊二烯基)钛及二氯二(α—二茂铁基、乙基、环戊二烯基)锆的合成与性质的研究.通过 IR 和~1HNMR 谱,表明这些化合物分别具有如下的化学结构:(...本文介绍了四(α—二茂铁基、乙基、环戊二烯基)钛,二环戊二烯基、二(α—二茂铁基、乙基、环戊二烯基)钛及二氯二(α—二茂铁基、乙基、环戊二烯基)锆的合成与性质的研究.通过 IR 和~1HNMR 谱,表明这些化合物分别具有如下的化学结构:(η^(5-α)—二茂铁基、乙基、环戊二烯基)_2Ti(η~1-α-环戊二烯基、乙基、二茂铁基)_2.(η~5一环戊二烯基)_2Ti(η~1-α-环戊二烯基、乙基、二茂铁基)_2,及(η~5-α-二茂铁基、乙基、环戊二烯基)_2ZrCl_2.展开更多
ESR method was used to elucidate the mechanism of the reactions of alkyl,allyl or benzyl halides with dicyclopentadienyldicarbonyl titanium.The paramagnetic intermediates of the reac- tions were identified during the ...ESR method was used to elucidate the mechanism of the reactions of alkyl,allyl or benzyl halides with dicyclopentadienyldicarbonyl titanium.The paramagnetic intermediates of the reac- tions were identified during the course of the reactions.The reaction mechanism based on ESR find- ings and the products analyses is postulated to operate on radical pathways.When alkyl halides were used to react with the organometallic compound 1,the intermediate found was[Cp_2Ti(CO)X](C), and the main product was identified to be dicyclopentadienyl-acyl-halo titanium(3),an insertion of TiCO into R-X,i.e.[Cp_2Ti-C(O)R]X.When allyl or benzyl halidcs were used,the intermediate found was[Cp_2TiX](B),and the main products were identified to be the dicyclopentadienyl titanium dihalides and the coupling products of allyl or benzyl groups.展开更多
<正> The ESR spectra of some [Cp2Ti（L）X] complexes （Cp: C5H5, MeC5H4; L: phosphane,isocyanide, pyridine, amine and carbon monoxide; X: F, Cl, Br, I） have been obtained.When X is Cl, Br or I, the linear relat...<正> The ESR spectra of some [Cp2Ti（L）X] complexes （Cp: C5H5, MeC5H4; L: phosphane,isocyanide, pyridine, amine and carbon monoxide; X: F, Cl, Br, I） have been obtained.When X is Cl, Br or I, the linear relationships between the g value and hyperfine couplingcoustant a（Ti） are explained in terms of the electron character of the L ligand and the ESRspectral trends of the complexes are studied.展开更多
文摘本文介绍了四(α—二茂铁基、乙基、环戊二烯基)钛,二环戊二烯基、二(α—二茂铁基、乙基、环戊二烯基)钛及二氯二(α—二茂铁基、乙基、环戊二烯基)锆的合成与性质的研究.通过 IR 和~1HNMR 谱,表明这些化合物分别具有如下的化学结构:(η^(5-α)—二茂铁基、乙基、环戊二烯基)_2Ti(η~1-α-环戊二烯基、乙基、二茂铁基)_2.(η~5一环戊二烯基)_2Ti(η~1-α-环戊二烯基、乙基、二茂铁基)_2,及(η~5-α-二茂铁基、乙基、环戊二烯基)_2ZrCl_2.
基金Supported by the National Natural Science Foundation of China.
文摘ESR method was used to elucidate the mechanism of the reactions of alkyl,allyl or benzyl halides with dicyclopentadienyldicarbonyl titanium.The paramagnetic intermediates of the reac- tions were identified during the course of the reactions.The reaction mechanism based on ESR find- ings and the products analyses is postulated to operate on radical pathways.When alkyl halides were used to react with the organometallic compound 1,the intermediate found was[Cp_2Ti(CO)X](C), and the main product was identified to be dicyclopentadienyl-acyl-halo titanium(3),an insertion of TiCO into R-X,i.e.[Cp_2Ti-C(O)R]X.When allyl or benzyl halidcs were used,the intermediate found was[Cp_2TiX](B),and the main products were identified to be the dicyclopentadienyl titanium dihalides and the coupling products of allyl or benzyl groups.
文摘<正> The ESR spectra of some [Cp2Ti（L）X] complexes （Cp: C5H5, MeC5H4; L: phosphane,isocyanide, pyridine, amine and carbon monoxide; X: F, Cl, Br, I） have been obtained.When X is Cl, Br or I, the linear relationships between the g value and hyperfine couplingcoustant a（Ti） are explained in terms of the electron character of the L ligand and the ESRspectral trends of the complexes are studied.
