Catalytic dechlorination of 1-chloronaphthalene(Ⅰ), 2-chloronaphthalene(Ⅱ),o-chlorobiphenyl(Ⅲ),m-chlorobiphenyl(Ⅳ),p-chlorobiphenyl(Ⅴ) 1-chloroanthracene(Ⅵ) and 2-chloroanthracene(Ⅶ) has been studied with dicyc...Catalytic dechlorination of 1-chloronaphthalene(Ⅰ), 2-chloronaphthalene(Ⅱ),o-chlorobiphenyl(Ⅲ),m-chlorobiphenyl(Ⅳ),p-chlorobiphenyl(Ⅴ) 1-chloroanthracene(Ⅵ) and 2-chloroanthracene(Ⅶ) has been studied with dicyclopentadienyl yttrium/NaH system.The dechlorination products for (Ⅰ),(Ⅱ),(Ⅲ),(Ⅳ) and (Ⅴ) are corresponding aromatics in excellent yields.However for (Ⅵ) and (Ⅶ), the dechlorination products are mixed aromatics.展开更多
The title compounds(Me_2SiSiMe_2)(η-RC_3H_3)Fe(CO)(μ-CO)_2(R:H(1a),Me(1b))were prepared by heating a solution of RC_(?)H_4(Me_2SiSiMe_2)C_5H_4R and Fe(CO)_5 in xylene at reflux.(1a)and(1b)can convert into their isom...The title compounds(Me_2SiSiMe_2)(η-RC_3H_3)Fe(CO)(μ-CO)_2(R:H(1a),Me(1b))were prepared by heating a solution of RC_(?)H_4(Me_2SiSiMe_2)C_5H_4R and Fe(CO)_5 in xylene at reflux.(1a)and(1b)can convert into their isomers Me_2Si(η-RC_3H_3)Fe(CO)_2(?)2(R:H(2a), Me(2b))under the reaction conditions.The crystal and molecular structures of(1a),(2a) and(2b)were determined by X-ray diffraction.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
文摘Catalytic dechlorination of 1-chloronaphthalene(Ⅰ), 2-chloronaphthalene(Ⅱ),o-chlorobiphenyl(Ⅲ),m-chlorobiphenyl(Ⅳ),p-chlorobiphenyl(Ⅴ) 1-chloroanthracene(Ⅵ) and 2-chloroanthracene(Ⅶ) has been studied with dicyclopentadienyl yttrium/NaH system.The dechlorination products for (Ⅰ),(Ⅱ),(Ⅲ),(Ⅳ) and (Ⅴ) are corresponding aromatics in excellent yields.However for (Ⅵ) and (Ⅶ), the dechlorination products are mixed aromatics.
文摘The title compounds(Me_2SiSiMe_2)(η-RC_3H_3)Fe(CO)(μ-CO)_2(R:H(1a),Me(1b))were prepared by heating a solution of RC_(?)H_4(Me_2SiSiMe_2)C_5H_4R and Fe(CO)_5 in xylene at reflux.(1a)and(1b)can convert into their isomers Me_2Si(η-RC_3H_3)Fe(CO)_2(?)2(R:H(2a), Me(2b))under the reaction conditions.The crystal and molecular structures of(1a),(2a) and(2b)were determined by X-ray diffraction.
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.
