1. Kenneth S. Pitzer Center for Theoretical Chemistry, Department of Chemistry, University of California, Berkeley, California 94720, USA
2. Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
3. Q-Chem Inc., 6601 Owens Drive, Suite 105, Pleasanton, California 94588, USA
4. Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA