作者:Marcela Hurtado、Manuel Yánez、Rebeca Herrero、Andrés Guerrero、Juan Z. Dávalos、José-Luis M. Abboud、Brahim Khater、Jean-Claude Guillemin
DOI:10.1002/chem.200802307
日期:2009.4.27
The acidity‐enhancing effect of BH3 in gas‐phase phosphine⋅boranes compared to the corresponding free phosphines is enormous, between 13 and 18 orders of magnitude in terms of ionization constants. Thus, the enhancement of the acidity of protic acids by Lewis acids usually observed in solution is also observed in the gas phase. For example, the gas‐phase acidities (GA) of MePH2 and MePH2⋅BH3 differ
酸度提高效果BH的3在气相膦⋅硼烷相比于相应的游离的膦是巨大的,大小为13级18之间的订单在电离常数的条款。因此,在气相中也观察到通常在溶液中观察到的路易斯酸对质子酸酸度的增强。例如,麦菲的气相酸度(GA)2和麦菲2 ⋅ BH 3由约118千焦摩尔不同-1(见图)。