Hydrocarbon activation by gas-phase lanthanide cations: interaction of praseodymium (Pr+), europium (Eu+), and gadolinium (Gd+) with small alkanes, cycloalkanes, and alkenes
作者:J. Bruce. Schilling、J. L. Beauchamp
DOI:10.1021/ja00209a002
日期:1988.1
reactivity. Gd/sup +/ can be thought of as having two valence electrons, and indeed it reacts similarly to Sc/sup +/ and the other group 3 metal ions Y/sup +/ and La/sup +/, yielding products corresponding to elimination of hydrogen, alkanes, and alkenes. The elimination of neutral alkenes in the reaction of Gd/sup +/ with alkanes results in the formation of metal dialkyl or hydrido-alkyl complexes. This finding
作者描述了气相镧系元素离子、镨 (Pr/sup +/)、铕 (Eu/sup +/) 和钆 (Gd/sup +/) 与小烷烃、环烷烃、烯烃和几种含氧化合物。只有 Gd/sup +/ 可以激活烷烃的 CH 和 CC 键。Gd/sup +/ (4f/sup 7/5d/sup 1/6s/sup 1/)的基态电子构型与Pr/sup +/- (4f/sup 3/6s/sup 1/)不同和 Eu/sup +/- (4f/sup 7/6s/sup 1/),得出的结论是 f 电子在金属离子反应性中的作用很小。Gd/sup +/ 可以认为有两个价电子,实际上它与Sc/sup +/ 和其他第3 族金属离子Y/sup +/ 和La/sup +/ 的反应类似,产生对应于消除的产物氢、烷烃和烯烃。在 Gd/sup +/ 与烷烃的反应中中性烯烃的消除导致金属二烷基或氢化烷基配合物的形成。该发现导致对介于 110 和 130