Influence of Substitution, Hybridization, and Solvent on the Properties of C−HO Single-Electron Hydrogen Bond in CH3−H2O Complex

详细信息    查看全文

• 作者：Xiulin An ; Haiping Liu ; Qingzhong Li ; Baoan Gong ; Jianbo Cheng
• 刊名：Journal of Physical Chemistry A
• 出版年：2008
• 出版时间：June 12, 2008
• 年：2008
• 卷：112
• 期：23
• 页码：5258 - 5263
• 全文大小：170K
• 年卷期：v.112,no.23(June 12, 2008)
• ISSN：1520-5215

文摘

The effect of substitution, hybridization, and solvent on the properties of the C···HO single-electron hydrogen bond has been investigated with quantum chemical calculations. Methyl radical, ethyl radical, and vinyl radical are used as the proton acceptors and are paired with water, methanol, HOCl, and vinyl alcohol. Halogenation (Cl) of the proton donor strengthens this type of hydrogen bond. The methyl group in the proton donor and proton acceptor plays a different role in the formation of the C···HO single-electron hydrogen bond. The former is electron-withdrawing, and the latter is electron-donating, both making a constructive contribution to the enhancement of the interaction. The contribution of the methyl group in the proton acceptor is larger than that in the proton donor. The increase of acidity of the proton is helpful to form a single-electron hydrogen bond. As the proton acceptor varies from the methyl radical to the vinyl radical, the interaction strength also increases. The solvent has an enhancing influence on the strength of the C···HO single-electron hydrogen bond. These factors affect the C···HO single-electron hydrogen bond in a similar way that they do other types of hydrogen bonds.