EVIDENCE FOR A SINGLE MINIMUM POTENTIAL FOR HYDROGEN-BONDS OF PYRIDINE N-OXIDE COMPLEXES WITH DICHLOROACETIC ACID IN DICHLOROMETHANE

被引：16

作者：

DEGASZAFRAN, Z ^{[1
]}

GRUNDWALDWYSPIANSKA, M ^{[1
]}

SZAFRAN, M ^{[1
]}

机构：

[1] ADAM MICKIEWICZ UNIV,DEPT CHEM,PL-60780 POZNAN,POLAND

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 1991年 / 47卷 / 01期

关键词：

D O I：

10.1016/0584-8539(91)80184-K

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

FTIR spectra of dichloracetic acid and its eight complexes with substituted pyridine N-oxides and N,N-dimethylaniline in dichloromethane-d2 are reported. 4-N,N-dimethylaminopyridine N-oxides form two types of complexes with dichloroacetic acid; the acid interacts with N-O or Me2N groups. The shape of the second derivative of absorption in the carbonyl region implies that the hydrogen bonds are described by a strongly asymmetrical quasi-single minimum potential. The situation with regard to the observed carbonyl frequencies as related to conformational equilibria is reviewed.

引用

页码：125 / 131

页数：7

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