Evaluation of the performance of MP4-based procedures for a wide range of thermochemical and kinetic properties

作者: Li-Juan Yu , Wenchao Wan , Amir Karton

DOI: 10.1016/J.CHEMPHYS.2016.10.009

关键词: Reference data (financial markets)Kinetic energyBasis setSet (abstract data type)Overall performanceRange (statistics)ChemistryComputational chemistry

摘要: Abstract We evaluate the performance of standard and modified MP n procedures for a wide set thermochemical kinetic properties, including atomization energies, structural isomerization conformational reaction barrier heights. The reference data are obtained at CCSD(T)/CBS level by means W protocols. find that none -based show acceptable challenging W4-11 BH76 databases. For other thermochemical/kinetic databases, MP2.5 MP3.5 provide most attractive accuracy-to-computational cost ratios. procedure results in weighted-total-root-mean-square deviation (WTRMSD) 3.4 kJ/mol, whilst computationally more expensive WTRMSD 1.9 kJ/mol (the same CCSD(T) method conjunction with triple-zeta basis set). also assess economical CCSD(T)/CBS(MP2) method, which provides best overall all considered BH76.

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