...
首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Density functional theoretical (DFT) study for the prediction of spectroscopic parameters of ClCCCN
【24h】

Density functional theoretical (DFT) study for the prediction of spectroscopic parameters of ClCCCN

机译:密度泛函理论(DFT)研究预测ClCCCN的光谱参数

获取原文
获取原文并翻译 | 示例
           

摘要

DFT(B3LYP, B3PW91) calculations in conjunction with three different basis sets have been utilized to investigate the variations in the bond lengths, dipole moment, rotational constants, IR frequencies, IR intensities and rotational invariants of ClCCCN. The nuclear quadrupole constants of chlorine (Cl-31, Cl-37) and nitrogen (N-14) of ClCCCN have been calculated on the experimental r(s) structure as well as on the B3PW91/6-311++g(d,p) optimized geometry and were found to be within the scale length of the experimental uncertainty. The slope and intercept obtained from the regression analysis between the B3LYP/6-311++g(d,p) level calculated and experimental B,, values of ClCCCN were used to calculate reasonable values of rotational constants of all the rare isotopic species of ClCCCN having standard deviation +/- 0.048 MHz. All the spectroscopic parameters obtained from DFT calculations show satisfactory agreement with the available experimental data. (c) 2006 Elsevier B.V. All rights reserved.
机译:DFT(B3LYP,B3PW91)计算与三个不同的基础集结合已用于研究ClCCCN的键长,偶极矩,旋转常数,IR频率,IR强度和旋转不变量的变化。 ClCCCN的氯(Cl-31,Cl-37)和氮(N-14)的核四极常数已经在实验r(s)结构以及B3PW91 / 6-311 ++ g(d ,p)优化的几何形状,并且发现在实验不确定度的标度长度内。计算得到的B3LYP / 6-311 ++ g(d,p)水平与实验B之间的回归分析得到的斜率和截距ClCCCN的值用于计算所有稀有同位素物种的旋转常数的合理值。具有标准偏差+/- 0.048 MHz的ClCCCN。从DFT计算获得的所有光谱参数均与可用的实验数据显示出令人满意的一致性。 (c)2006 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号