首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Energy-Consistent Pseudopotentials for the 5d ElementssBenchmark Calculations for Oxides, Nitrides, and Pt_2
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Energy-Consistent Pseudopotentials for the 5d ElementssBenchmark Calculations for Oxides, Nitrides, and Pt_2

机译:5d元素的能量恒定伪势基准氧化物,氮化物和Pt_2的基准计算

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摘要

The performance of new relativistic energy-consistent pseudopotentials for the 5d elements, adjusted to atomic valence spectra from multiconfiguration Dirac-Hartree-Fock calculations (J. Chem. Phys. 2009, 130, 164108.), is examined in coupled cluster and multireference configuration interaction benchmark calculations for the diatomics HfO, TaO, WO, ReN, OsN, IrN, and Pt2, with basis sets of up to quintuple- quality. The final accuracy reached for the oxides and nitrides, with corrections for pseudopotential errors (contributions from 4f shell correlation, for example), is 0.3 pm for bond lengths and 17 cm-1 (1.5%) for harmonic vibrational frequencies. The spectroscopic constants of the ground state of Pt2 can be reproduced with deviations of 3 pm for the bond length and 1 cm-1 for the vibrational frequency, without any correction for pseudopotential errors.
机译:在耦合簇和多参考配置下检查了5d元素的新的相对论能量一致伪势的性能,这些势能已通过多配置Dirac-Hartree-Fock计算(J. Chem。Phys。2009,130,164108.)调整为原子价谱。 HfO,TaO,WO,ReN,OsN,IrN和Pt2的双原子相互作用基准计算,基数最高为五倍质量。氧化物和氮化物的最终精度(对伪电位误差(例如,来自4f壳相关性的贡献)进行了校正)对于键长为0.3 pm,对于谐波振动频率为17 cm-1(1.5%)。 Pt2基态的光谱常数可以用键长度的3 pm和振动频率1 cm-1的偏差再现,而无需对伪电位误差进行任何校正。

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