INFRARED-SPECTRA AND FORCE-CONSTANTS OF UREA IN THE GASEOUS-PHASE

被引：22

作者：

LANGER, J

SCHRADER, B

BASTIAN, V

JACOB, E

机构：

[1] UNIV ESSEN GESAMTHSCH,INST PHYS & THEORET CHEM,D-45117 ESSEN,GERMANY

[2] DR BASTIAN GMBH FEINWERKTECHN,D-42119 WUPPERTAL,GERMANY

[3] MAN NUTZFAHRZEUGE AG,D-80995 MUNICH,GERMANY

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1995年 / 352卷 / 05期

关键词：

D O I：

10.1007/BF00323373

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Infrared spectra in the gaseous phase have been recorded for the first time for urea and the isotopomers urea-D-4, urea-N-15(2) and urea-C-13. On the base of these data a normal coordinate calculation has been performed, resulting in an optimized force field of urea, showing that, due to the very small intermolecular forces, the internal force constants increase by evaporation. This is especially true for the C=O-bond with a force constant increased by 10%.

引用

页码：489 / 495

页数：7

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