* Corresponding authors

^a Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
E-mail: wwlukens@lbl.gov

^b Institute of Inorganic Chemistry, RWTH Aachen University, Aachen, Germany
E-mail: manfred.speldrich@ac.rwth-aachen.de

^c Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM, USA
E-mail: pyang@lanl.gov

^d Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, USA
E-mail: jochena@buffalo.edu

^e Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute (PGI-6), Forschungszentrum Jülich, 52425 Jülich, Germany