EVIDENCE FOR SINGLE-MINIMUM POTENTIALS FOR INTRAMOLECULAR HYDROGEN-BONDS OF SUBSTITUTED PICOLINIC-ACID N-OXIDES

被引：12

作者：

DEGASZAFRAN, Z

GRUNDWALDWYSPIANSKA, M

SZAFRAN, M

机构：

[1] Department of Chemistry, A. Mickiewicz University, 60780 Poznań

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1992年 / 275卷

关键词：

D O I：

10.1016/0022-2860(92)80192-K

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 shape of the second derivative of absorption in the carbonyl region of substituted picolinic acid N-oxides suggests that the intramolecular hydrogen bonds are described by a strongly asymmetrical quasi-single-minimum potential. The intensities of the hydrogen-bond modes in the investigated acids are very weak in comparison with similar short inter-molecular hydrogen bonds. The in-plane hydrogen-bond mode is strongly mixed with the carbonyl mode and this is reponsible for band structure in the 1700 cm- 1 region.

引用

页码：159 / 165

页数：7

共 17 条

[1]

AUBELJ F, 1985, SPECTROCHIM ACTA A, V41, P75

[2]

Bellamy L.J., 1975, INFRARED SPECTRA COM

[3] INFRARED AND H-1 NUCLEAR MAGNETIC-RESONANCE STUDIES OF HYDROGEN-BONDS IN SOME PYRIDINE N-OXIDE TRIFLUOROACETATES AND TRICHLORACETATES IN CHLOROFORM - CORRELATION OF OH STRETCHING FREQUENCIES AND PROTON CHEMICAL-SHIFTS WITH PYRIDINE N-OXIDE PKA VALUES [J].