INTERMOLECULAR LI+ AND NA+ BONDS IN N-(1,6-DIHYDRO-6-OXOPYRIMIDIN-2-YL) AMINO-ACIDS - CATION POLARIZABILITIES STUDIED BY FOURIER-TRANSFORM INFRARED-SPECTROSCOPY

被引：5

作者：

BRZEZINSKI, B ^{[1
]}

SPYCHALA, J ^{[1
]}

GOLANKIEWICZ, K ^{[1
]}

ZUNDEL, G ^{[1
]}

机构：

[1] UNIV MUNICH,INST PHYS CHEM,W-8000 MUNICH 2,GERMANY

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1992年 / 88卷 / 10期

关键词：

D O I：

10.1039/ft9928801391

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：

The tetrabutylammonium, Li+ and Na+ complexes of six N-(1,6-dihydro-6-oxopyrimidin-2-yl) amino acids (CAA) were studied by FTIR spectroscopy and compared with results obtained earlier with isomeric amino acids. In all amino acids an intramolecular OH...ON reversible O-...H+ ON hydrogen bond with large proton polarizability has been observed. In the tetrabutylammonium salts of the amino acids the carboxylic acid group forms a strong asymmetrical NH...O- bond. In all Li+ compounds intramolecular Li+ bonds with double-minimum proton potentials and large 'Li+ polarizability' are found. In the case of the Na+ bonds flat, single-minimum Na+ potentials are present in the intramolecular Na+ bonds. The amplitude of the fluctuation, and hence the 'Na+ polarizability', is however small owing to the large mass of the Na+ ions.

引用

页码：1391 / 1393

页数：3

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