Formal Nickelate(−I) Complexes Supported by Group 13 Ions |
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| Authors: | Matthew V Vollmer Dr Jing Xie Ryan C Cammarota Dr Victor G Young Jr Dr Eckhard Bill Prof Laura Gagliardi Prof Connie C Lu |
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| Affiliation: | 1. Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, MN, USA;2. Max-Planck-Institut für chemische Energiekonversion, Mülheim an der Ruhr, Germany |
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| Abstract: | Formal nickelate(?I) complexes bearing Group 13 metalloligands (M=Al and Ga) were isolated. These 17 e? complexes were synthesized by one‐electron reduction of the corresponding Ni0→MIII precursors, and were investigated by single‐crystal X‐ray diffraction, EPR spectroscopy, and quantum chemical calculations. Collectively, the experimental and computational data support: 1) the strengthening of the Ni?M bond upon one‐electron reduction, and 2) the delocalization of the unpaired spin across the Ni and M atoms. An intriguing electronic configuration is revealed where three valence electrons occupy two σ‐type bonding interactions: Ni(3d )2→M and σ‐(Ni?M)1. The latter is an unusual Ni?M σ‐bonding molecular orbital that comprises primarily the Ni 4pz and M npz/ns atomic orbitals. |
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| Keywords: | EPR spectroscopy Group 13 elements metalates nickel radicals |
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