INFRARED AND RAMAN STUDIES ON THE INTERNAL-MODES OF LITHIUM AMIDE

被引：66

作者：

BOHGER, JPO ^{[1
]}

ESSMANN, RR ^{[1
]}

JACOBS, H ^{[1
]}

机构：

[1] UNIV GESAMTHSCH SIEGEN,D-57068 SIEGEN,GERMANY

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1995年 / 348卷

关键词：

D O I：

10.1016/0022-2860(95)08654-E

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：

Infrared and Raman spectra of LiNH2 and LiND2 as well as of isotopically diluted samples, LiN(H,D)(2), are reported and discussed with respect to structural and bonding features of the amide ion in condensed phases in comparison to crystalline hydrates and hydroxides. Due to the high charge density of the Li+-ion the NH-stretching modes are shifted to higher energy (Delta<(nu)over tilde>approximate to 130cm(-1)) compared to the free ion. They are split into two components in the uncoupled NHD--ions contained in partially diluted samples, caused by two crystallographic nonequivalent hydrogen atoms. Despite of the high charge density of the Li+-ion the proton donor strength of the amide is not enlarged in a way that hydrogen bonds could be observed - neither spectroscopically (temperature shift of NH-stretching modes) nor crystallographically.

引用

页码：325 / 328

页数：4

共 15 条

[1]

BOCK, 1986, THESIS U DORTMUND

[2] AN ABINITIO CALCULATION OF THE VIBRATIONAL FREQUENCIES OF NH2- AND ITS ISOTOPOMERS [J].