THE CONFORMATIONAL EQUILIBRIA AND INFRARED MATRIX-ISOLATION SPECTRA OF CHLOROACETYL FLUORIDE AND BROMOACETYL FLUORIDE

被引：9

作者：

ELBINDARY, AA ^{[1
]}

HORN, A ^{[1
]}

KLAEBOE, P ^{[1
]}

NIELSEN, CJ ^{[1
]}

机构：

[1] UNIV OSLO,DEPT CHEM,POB 1033,N-0315 OSLO 3,NORWAY

来源：

JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE | 1993年 / 90卷 / 09期

关键词：

VIBRATIONAL SPECTRA; MATRIX ISOLATION; CONFORMERS; ENTHALPIES; HALOACETYL HALIDES;

D O I：

10.1051/jcp/1993901685

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Infrared spectra of chloroacetyl fluoride and bromoacetyl fluoride were investigated in argon and nitrogen matrices at 14 K with nozzle temperatures from 313 to 700 K. After annealing to 30-34 K the spectra changed considerably and the high energy conformer (gauche) nearly vanished. Raman spectra of the liquids were recorded at var-ious temperatures and as amorphous and crystalline solids. The enthalpy differences were found to be DELTAH0 (gauche - anti) = 6.5 +/- 0.4 kJ mol-1 in chloroacetyl fluoride and 4.9 +/- 0.4 kJ mol-I for bromoacetyl fluoride. The matrix spectra recorded at different nozzle temperatures gave lower DELTAH0 values than reported from isothermal vapour cells, indicating that the high energy conformer (gauche) was partly converted to anti during deposition due to the low gauche-anti barrier.

引用

页码：1685 / 1701

页数：17

共 18 条

[1] MATRIX-ISOLATION VIBRATIONAL SPECTROSCOPY AS A TOOL FOR STUDYING CONFORMATIONAL ISOMERISM [J].