supported by the National Natural Science Foundation of China (20473011, 20773011 and 20625311)
A few open-shell molecules are taken as examples in order to examine the performance of the open-shell perturbation theory for electron correlation(J Chem Theory Comput,2009,5:931–936).The convergence of the perturba...
Supported by the National Natural Science Foundation of China (Grant No. 20473011);the University of Science and Technology Beijing (Grant No. 00007414);the Ministry of Education of China (Grant No. 11140036)
The size consistency of the second and third order energies of the multireference perturbation theory(Chen F, Davidson E, Iwata S. Int J Quant Chem, 2002, 86: 256) is investigated theoretically with a su-per-molecular...