Abstract
A linear free-energy relationship exists between the half-wave potentials of the (II/I) couples of Ni(diphosphine)2 complexes and the hydride donor ability (ΔG°H -) of the corresponding [HNi(diphosphine)2]+ complexes. A similar correlation is observed between the half-wave potentials of the (I/O) couples of Ni(diphosphine)2 complexes and the pKa values (or ΔG°H +) of the corresponding [HNi(diphosphine)2]+ complexes. As a result, it is possible to use the potentials of these two couples to predict the free energies of all three Ni-H bond cleavage reactions, ΔG°H+, ΔG°H·, and ΔG°H-, for this class of nickel complexes. The molecular structures of Ni(Et2PCH2CH2 PPh2)2 and Ni(Ph2PCHCHPPh2)2 were determined by single-crystal X-ray diffraction studies.
Original language | English |
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Pages (from-to) | 1832-1839 |
Number of pages | 8 |
Journal | Organometallics |
Volume | 20 |
Issue number | 9 |
Publication status | Published - Apr 30 2001 |
ASJC Scopus subject areas
- Inorganic Chemistry
- Organic Chemistry