Trialkylborane-Assisted CO<sub>2</sub> Reduction by Late Transition Metal Hydrides
作者:Alexander J. M. Miller、Jay A. Labinger、John E. Bercaw
DOI:10.1021/om200364w
日期:2011.8.22
promote reduction of CO2 to formate by bis(diphosphine) Ni(II) and Rh(III) hydride complexes. The late transition metal hydrides, which can be formed from dihydrogen, transfer hydride to CO2 to give a formate–borane adduct. The borane must be of appropriate Lewis acidity: weaker acids do not show significant hydride transfer enhancement, while stronger acids abstract hydride without CO2 reduction. The
三烷基硼烷添加剂通过双(二膦)Ni(II)和Rh(III)氢化物配合物促进CO 2还原成甲酸盐。可以由二氢形成的晚期过渡金属氢化物将氢化物转移到 CO 2 中,生成甲酸盐-硼烷加合物。硼烷必须具有适当的路易斯酸度:较弱的酸不会显示出显着的氢化物转移增强,而较强的酸在没有 CO 2还原的情况下提取氢化物。该机制可能涉及预平衡氢化物转移,然后形成稳定的甲酸 - 硼烷加合物。
CHA, JIN SOON;YOON, MAL SOOK;LEE, KWANG WOO;LEE, JAE CHEOL, HETEROCYCLES, 27,(1988) N, C. 1455-1460
作者:CHA, JIN SOON、YOON, MAL SOOK、LEE, KWANG WOO、LEE, JAE CHEOL