Based on neighbouring group participation, we have proposed a bi-bridge reaction mechanism, i.e. in the path of the reaction, there is a bi-bridged structure with two bridging atoms across a single carbonus-cacbon bon...Based on neighbouring group participation, we have proposed a bi-bridge reaction mechanism, i.e. in the path of the reaction, there is a bi-bridged structure with two bridging atoms across a single carbonus-cacbon bond. We have studied it by ab initio molecular orbital calculation. And all the geometries of the bi-bridge structines studied by us are transition states of the bi-bridge reaction. The theoretical data of structures,energies, and charge distribution give good information about such kind of reactions.展开更多
Silk dyeing with several classes of reactive dyes was studied.A class of reactive dyes con-taining(N-methyl-β-sulfoethylamino)ethylsulfonyl groups for silk is presented.A new method forintroducing such a reactive gro...Silk dyeing with several classes of reactive dyes was studied.A class of reactive dyes con-taining(N-methyl-β-sulfoethylamino)ethylsulfonyl groups for silk is presented.A new method forintroducing such a reactive group and a kinetic studies on the reaction mechanism involved are pro-posed.A kinetic isotopic effect on dyeing mechanism with silk is discussed and the optimum dyeingtechniques recommended.Dyeing or printing was carried out in neutral media;brilliant shades,goodfastness,high fixation and excellent storage stability are given.展开更多
文摘Based on neighbouring group participation, we have proposed a bi-bridge reaction mechanism, i.e. in the path of the reaction, there is a bi-bridged structure with two bridging atoms across a single carbonus-cacbon bond. We have studied it by ab initio molecular orbital calculation. And all the geometries of the bi-bridge structines studied by us are transition states of the bi-bridge reaction. The theoretical data of structures,energies, and charge distribution give good information about such kind of reactions.
基金Supported by National Natural Science Foundation of China
文摘Silk dyeing with several classes of reactive dyes was studied.A class of reactive dyes con-taining(N-methyl-β-sulfoethylamino)ethylsulfonyl groups for silk is presented.A new method forintroducing such a reactive group and a kinetic studies on the reaction mechanism involved are pro-posed.A kinetic isotopic effect on dyeing mechanism with silk is discussed and the optimum dyeingtechniques recommended.Dyeing or printing was carried out in neutral media;brilliant shades,goodfastness,high fixation and excellent storage stability are given.
