Multireference Methods for Calculating the Dissociation Enthalpy of Tetrahedral P4 to Two P2

Meagan S. Oakley, Jie J. Bao, Mariusz Klobukowski, Donald G. Truhlar, Laura Gagliardi

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The potential energy surface for the thermal decomposition of P4 → 2P2 was computed along the C2v reaction trajectory. Single-reference methods were not suitable for describing this complex bond-breaking process, so two multiconfigurational methods, namely, multistate complete active space second-order perturbation theory (MS-CASPT2) and multiconfiguration pair-density functional theory (MC-PDFT), were used with the aim of determining the accuracy and efficiency of these methods for this process. Several active spaces and basis sets were explored. It was found that the multiconfiguration pair-density functional theory method was up to 900 times faster than multistate complete active space second-order perturbation theory while providing similar accuracy.

Original languageEnglish (US)
Pages (from-to)5742-5749
Number of pages8
JournalJournal of Physical Chemistry A
Volume122
Issue number26
DOIs
StatePublished - Jul 5 2018

Fingerprint Dive into the research topics of 'Multireference Methods for Calculating the Dissociation Enthalpy of Tetrahedral P<sub>4</sub> to Two P<sub>2</sub>'. Together they form a unique fingerprint.

Cite this