کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5418797 | 1506957 | 2007 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Theoretical study on hydrogen bonding interaction of ureas and thioureas with imines
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The hydrogen bonding interaction between ureas and thioureas with imines was investigated using the MP2 method. In combination with the catalytic reactions, we discussed two different hydrogen bonding patterns, which have the same typical hydrogen bonding feature of red shift effect. Based on it, the substituent effect of the more stable pattern was researched. The results indicated that electron-withdrawing groups on ureas or thioureas and electron-donating groups on imines can both facilitate the hydrogen bonding formation. We also studied the cis-trans isomerization of this pattern which is associated with the catalysis mechanism. The NBO analysis gave a more profound understanding of the hydrogen bonding interaction and appeared quite significant in view of their importance for understanding the intermolecular interaction leading to hydrogen bonding.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Structure: THEOCHEM - Volume 822, Issues 1â3, 15 November 2007, Pages 103-110
Journal: Journal of Molecular Structure: THEOCHEM - Volume 822, Issues 1â3, 15 November 2007, Pages 103-110
نویسندگان
Wen-Rui Zheng, Yao Fu, Kuang Shen, Lei Liu, Qing-Xiang Guo,