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Thermodynamic and kinetic hydricity of transition metal hydrides

Journal Article · · Chemical Society Reviews
DOI:https://doi.org/10.1039/d0cs00405g· OSTI ID:1851880

The prevalence of transition metal-mediated hydride transfer reactions in chemical synthesis, catalysis, and biology has inspired the development of methods for characterizing the reactivity of transition metal hydride complexes. Thermodynamic hydricity represents the free energy required for heterolytic cleavage of the metal–hydride bond to release a free hydride ion, H-, as determined through equilibrium measurements and thermochemical cycles. Kinetic hydricity represents the rate of hydride transfer from one species to another, as measured through kinetic analysis. This tutorial review describes the common methods for experimental and computational determination of thermodynamic and kinetic hydricity, including advice on best practices and precautions to help avoid pitfalls. The influence of solvation on hydricity is emphasized, including opportunities and challenges arising from comparisons across several different solvents. Connections between thermodynamic and kinetic hydricity are discussed, and opportunities for utilizing these connections to rationally improve catalytic processes involving hydride transfer are highlighted.

Research Organization:
Univ. of North Carolina, Chapel Hill, NC (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0014255
OSTI ID:
1851880
Alternate ID(s):
OSTI ID: 1714401
Journal Information:
Chemical Society Reviews, Journal Name: Chemical Society Reviews Journal Issue: 22 Vol. 49; ISSN 0306-0012
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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