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An Evaluation of Various Computational Methods for the Treatment of Organoselenium Compounds

机译:多种计算方法治疗有机硒化合物的评价

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摘要

A reliable computational method for the prediction of organoselenium geometries and bond dissociation energies (BDEs) has been determined on the basis of the performance of density functional theory (DFT:B3LYP and B3PW91) and ab initio molecular orbital procedures (Hartree-Fock (HF)) in conjunction with various Pople basis sets including (but not limited to) the 6-31G(d),6-31G(d,p),6-311G(d),6-311G(d,p),6-311G(2df,p),and 6-311G(3df,3pd) sets.Predicted geometries and BDEs are compared with available experimental data and quadratic configuration interaction including single and double substitutions (QCISD) results.The B3PW91/ 6-311G(2df,p) level of theory is recommended for the prediction of the geometries and energetics of organoselenium compounds.
机译:基于密度泛函理论(DFT:B3LYP和B3PW91)的性能和从头算分子轨道过程(Hartree-Fock(HF)),确定了一种可靠的计算方法,用于预测有机硒的几何形状和键解离能(BDE)。 )结合各种Pople基集,包括(但不限于)6-31G(d),6-31G(d,p),6-311G(d),6-311G(d,p),6- 311G(2df,p)和6-311G(3df,3pd)集。将预测的几何形状和BDE与可用的实验数据和包括单次和两次取代(QCISD)在内的二次构型相互作用进行比较.B3PW91 / 6-311G(2df) ,p)建议使用理论水平来预测有机硒化合物的几何形状和能量。

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