1. Department of Chemistry, Pritzker School of Molecular Engineering, James Franck Institute, Chicago Center for Theoretical Chemistry, The University of Chicago, Chicago, Illinois 60637-1403, United States
2. Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
3. Department of Chemistry-BMC, Uppsala University, Uppsala 75123, Sweden
4. Argonne National Laboratory, Lemont, Illinois 60439-4801, United States