REKS calculations on ortho-, meta- and para-benzyne

REKS calculations on ortho-, meta- and para-benzyne
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邻位、间位和对位苯炔的 REKS 计算

DOI:
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发表时间:
2000
期刊:
影响因子:
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通讯作者:
S. Shaik
S. Shaik
中科院分区:
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文献类型:
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作者:
S. D. Visser;M. Filatov;S. Shaik

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自旋受限 系综引用的Kohn-Sham(REKS)计算已经在异构化的Benzyne体系上进行。密度泛函计算结果与多参考CASPT2和CASRS3方法的计算结果相比较,具有较好的一致性。 总体而言,对于等键反应的热焓,雷克斯能量与实验符合较好。 与从头算相比 计算。实验单胞胎-三胞胎 能量 缝隙被重现 降至实验值的1kcal摩尔−1以内。
Spin-restricted ensemble-referenced Kohn–Sham (REKS) calculations have been performed on isomeric benzyne systems. The density functional results compare favorably with those of multi-reference CASPT2 and CASRS3 methods. In general for enthalpies of isodesmic reactions, the REKS energies are in better agreement with experiment compared with the ab initio calculations. Experimental singlet–triplet energy gaps are reproduced to within 1 kcal mol−1 of experimental values.