INTRA-MOLECULAR EASILY POLARIZABLE HYDROGEN-BONDS IN DIAMIDES OF SUCCINIC AND ORTHO-PHTHALIC ACID

被引：13

作者：

BRZEZINSKI, B ^{[1
]}

ZUNDEL, G ^{[1
]}

机构：

[1] UNIV MUNICH,INST PHYS CHEM,D-8000 MUNICH 2,FED REP GER

来源：

CHEMICAL PHYSICS LETTERS | 1979年 / 61卷 / 02期

关键词：

D O I：

10.1016/0009-2614(79)80651-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Succinic 1, o-phthalic 2 and oxalic 3 acid diamides (acetonitrile-d3 solutions) as well as their perchlorates were studied by proton magnetic resonance and infrared spectroscopy. With compounds 1 and 2 the protons are added to the N atoms but no intramolecular symmetrical N+H ... N ⇌ N ... H+N hydrogen bonds are formed. The NH+ groups build up intramolecular asymmetrical N+H ... OCN ⇌ N ... HOC+N hydrogen bonds. A double-minimum energy surface is present in these intramolecular bonds. They are easily polarizable. Hydrogen-bonded N+H groups are in equilibrium with non-hydrogen-bonded N+H groupgs. With the perchlorate of oxalic acid diamide 3, the protons are added to the O atoms of carbonyl groups. Most of the O+H groups formed interact only weakly with their environment. However, a few groups form intermolecular structurally symmetrical easily polarizable O+H ... O ⇌ O ... H+O hydrogen bonds. © 1979.

引用

页码：315 / 318

页数：4