Statistical Electronic Structure Calibration Study of the CCSD(T*)-F12b Method for Atomization Energies

The Journal of Physical Chemistry. a
David Feller

Abstract

In the explicitly correlated CCSD(T)-F12b coupled cluster method only the singles and doubles component of the energy benefits from inclusion of terms involving the interelectronic distance. Consequently, only that component exhibits accelerated convergence with respect to the 1-particle basis set. The smaller perturbative triples component converges at the same rate as the corresponding piece in standard CCSD(T). With the alternative CCSD(T*)-F12b method the triples correlation energy is scaled up by the ratio of explicitly correlated to standard second-order perturbation theory correlation energies in an attempt to better approximate the basis set limit. An extensive and diverse 212 molecule collection of reference total atomization energies, developed with large basis sets (up to aug-cc-pV9Z in some cases) and standard CCSD(T), was used to calibrate the performance of CCSD(T*). Scaling of the (T) energy led to improved results relative to raw F12b values but only provided a statistical advantage over previously proposed complete basis set extrapolation techniques for the smallest basis sets. With larger sets, scaling (T) produced noticeably poorer results, sometimes by a factor of 2. In agreement with earlier studies, basis ...Continue Reading

References

Apr 20, 2005·The Journal of Chemical Physics·Heike FlieglChristof Hättig
Feb 14, 2006·The Journal of Chemical Physics·David FellerT Daniel Crawford
Dec 18, 2007·The Journal of Chemical Physics·Thomas B AdlerHans-Joachim Werner
Mar 5, 2008·The Journal of Chemical Physics·Kirk A PetersonHans-Joachim Werner
Apr 25, 2008·The Journal of Chemical Physics·Gerald Knizia, Hans-Joachim Werner
Jun 7, 2008·Physical Chemistry Chemical Physics : PCCP·Oliver Marchetti, Hans-Joachim Werner
Dec 3, 2008·The Journal of Chemical Physics·Kazim E Yousaf, Kirk A Peterson
Feb 12, 2009·The Journal of Chemical Physics·Gerald KniziaHans-Joachim Werner
Feb 12, 2009·The Journal of Chemical Physics·Guntram RauhutHans-Joachim Werner
Nov 16, 2010·The Journal of Chemical Physics·David FellerJ Grant Hill
Aug 3, 2011·The Journal of Chemical Physics·David FellerJ Grant Hill

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Citations

Jun 10, 2016·The Journal of Chemical Physics·Nitai SylvetskyJan M L Martin
Oct 22, 2018·The Journal of Chemical Physics·Manoj K KesharwaniJan M L Martin
Jan 28, 2021·The Journal of Physical Chemistry. a·John M Herbert, Kevin Carter-Fenk

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