title: Multireference perturbation theory can predict a false ground state.
abstract: Prediction of a false ground state with popular variants of multireference perturbation theory (CASPT2 and MRMP) is reported for a remarkably simple chemical system: the Sc(2) molecule.
authors.affiliation: Institute of Molecular Science and Department of Applied Chemistry, National Chiao Tung University, 1001 Ta-Hsueh Road, Hsinchu 30010, Taiwan.
authors.forename: Cristopher
authors.initials: C
authors.lastname: Camacho
authors.forename: Renzo
authors.initials: R
authors.lastname: Cimiraglia
authors.forename: Henryk A
authors.initials: HA
authors.lastname: Witek