Ionic hydrogen bond and ion solvation. 6. Interaction energies of the acetate ion with organic molecules. Comparison of CH3COO- with Cl-, CN-, and SH-
作者:Michael. Mautner
DOI:10.1021/ja00220a021
日期:1988.6
delta..H/sup 0//sub D/ = 25-31 kcal/mol. With the carbon acids CH/sub 3/CHO, CH/sub 3/COCH/sub 3/, and CH/sub 3/CN as ligands, the attachment energies are 14-16 kcal/mol and the interactions may involve multiple O/sup -/..HC bonds. Despite the fact that the ions CH/sub 3/COO/sup -/, Cl/sup -/, CN/sup -/, and SH/sup -/ differ in size, structure, electronegativity, isotropy, and available bonding sites
CH/sub 3/COO/sup -/ 与质子和非质子分子的相互作用能通过脉冲高压质谱法测量。前三个水分子的附着能分别为 15.8、12.8 和 11.8 kcal/mol。..delta..H/sub condsn/(H/sub 2/O) 的快速方法表明离子相互作用主要由前两个溶剂分子引起。CH/sub 3/COO/sup -/ 与 NH 酸(如吡咯、酰胺和苯胺)形成强氢键,..delta..H/sup 0//sub D/ = 25-31 kcal/mol。以碳酸CH/sub 3/CHO、CH/sub 3/COCH/sub 3/和CH/sub 3/CN为配体,结合能为14-16 kcal/mol,相互作用可能涉及多个O/ sup -/..HC 债券。尽管离子 CH/sub 3/COO/sup -/、Cl/sup -/、CN/sup -/ 和 SH/sup -/ 在大小、结构、电负性、各向