D. Heinekey, W. Oldham
May 1, 1993
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Journal
Chemical Reviews
Abstract
At the present time more than 170 dihydrogen complexes have been reported. The very rapid development of this field is remarkable. This review summarizes in a comprehensive fashion the synthesis, characterization, structure, and reactivity of dihydrogen complexes. Coverage of the literature is up to the end of 1992. The paper begins with dihydrogen synthesis methods: reaction with hydrogen, protonation of hydride complexes, and synthesis under reducing conditions. After a section on computational studies, the paper describes the characterization of dihydrogen complexes by diffraction, solid state NMR, vibrational spectroscopy, and solution NMR methods (H-D coupling, relaxation time measurements, and correlation of H-H distance with J[sub H-D]). The section on reactivity includes a review of the kinetics and thermodynamics of H[sub 2] binding and displacement, dihydrogen/dihydride interconversion, acidity of coordinated dihydrogen, and hydrogenation and reduction reactions. 153 references.