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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Phenol?Quinone Tautomerism in (Arylazo)naphthols and the Analogous Schiff Bases: Benchmark Calculations
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Phenol?Quinone Tautomerism in (Arylazo)naphthols and the Analogous Schiff Bases: Benchmark Calculations

机译:(芳基偶氮)萘酚和类似的席夫碱中的苯酚奎宁互变异构现象:基准计算

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摘要

Tautomerization energies of a series of isomeric [(4-R-phenyl)azo]-naphthols and the analogous Schiff bases (R = N(CH_3)_2, OCH_3, H, CN, NO_2) are calculated by LPNO-CEPA/1-CBS using the def2-TZVPP and def2-QZVPP basis sets for extrapolation. The performance of various density functionals (B3LYP, M06-2X, PW6B95, B2PLYP, mPW2PLYP, PWPB95) as well as MP2 and SCS-MP2 is evaluated against these results. M06-2X and SCS-MP2 yield results close to the LPNO-CEPA/1-CBS values. Solvent effects (CCl_4, CHCl_3, CH_3CN, and CH_3OH) are treated by a variety of bulk solvation models (SM8, IEFPCM, COSMO, PBF, and SMD) as well as explicit solvation (Monte Carlo free energy perturbation using the OPLSAA force field).
机译:一系列[[4-R-苯基)偶氮]-萘酚和类似席夫碱(R = N(CH_3)_2,OCH_3,H,CN,NO_2)的互变异构能通过LPNO-CEPA / 1-计算CBS使用def2-TZVPP和def2-QZVPP基集进行外推。根据这些结果评估了各种密度功能部件(B3LYP,M06-2X,PW6B95,B2PLYP,mPW2PLYP,PWPB95)以及MP2和SCS-MP2的性能。 M06-2X和SCS-MP2的产量结果接近LPNO-CEPA / 1-CBS值。溶剂效应(CCl_4,CHCl_3,CH_3CN和CH_3OH)通过多种本体溶剂化模型(SM8,IEFPCM,COSMO,PBF和SMD)以及显式溶剂化(使用OPLSAA力场的蒙特卡洛自由能扰动)进行处理。

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