Ten years after the first synthesis of neutral two-coordinated phosphorus in 1962, the first phosphenium cations were synthesized by Fleming, Lupton and Jekot in 1972. Up to now, though 30 years have passed, the membe...Ten years after the first synthesis of neutral two-coordinated phosphorus in 1962, the first phosphenium cations were synthesized by Fleming, Lupton and Jekot in 1972. Up to now, though 30 years have passed, the members of these phosphenium cations are still very few. the research of phosphenium cations is only limited in France, America and other countries. In our laboratory work was done on a new unique cation: the 5-methylthio-3-N-phenyl-2,3-2(H)-1,3,4,2-thiadiazaphosphenium cation which was found and characterized by 261.9 ppm conclusively of ^(31)p NMR. It also has an electric conductivity in nucleophilic and electrophilic reactions. We are interested in noticing that these phospbenium cations are stabilized by one sulfur atom besides nitrogen atoms.展开更多
The first aliphatic phosphenium cation featuring a P-S bond (dimethylamino)(methylthio)phosphenium cation 1.has been prepared by treatument of the (dimethylamino)(methylthio) chlorophosphines 2 wih the stoichiometri q...The first aliphatic phosphenium cation featuring a P-S bond (dimethylamino)(methylthio)phosphenium cation 1.has been prepared by treatument of the (dimethylamino)(methylthio) chlorophosphines 2 wih the stoichiometri quantity of AlCl3 in CH2Cl2 solution, and charcterized by 1H 13C 27Al and 31P NMR spectroseopy展开更多
基金Project supported by the National Natural Fund for Young Scientists
文摘Ten years after the first synthesis of neutral two-coordinated phosphorus in 1962, the first phosphenium cations were synthesized by Fleming, Lupton and Jekot in 1972. Up to now, though 30 years have passed, the members of these phosphenium cations are still very few. the research of phosphenium cations is only limited in France, America and other countries. In our laboratory work was done on a new unique cation: the 5-methylthio-3-N-phenyl-2,3-2(H)-1,3,4,2-thiadiazaphosphenium cation which was found and characterized by 261.9 ppm conclusively of ^(31)p NMR. It also has an electric conductivity in nucleophilic and electrophilic reactions. We are interested in noticing that these phospbenium cations are stabilized by one sulfur atom besides nitrogen atoms.
文摘The first aliphatic phosphenium cation featuring a P-S bond (dimethylamino)(methylthio)phosphenium cation 1.has been prepared by treatument of the (dimethylamino)(methylthio) chlorophosphines 2 wih the stoichiometri quantity of AlCl3 in CH2Cl2 solution, and charcterized by 1H 13C 27Al and 31P NMR spectroseopy
