Organometallic chemistry - Hydrogen ligand and corresponding derivatives : Acidity of the hydrogen atom bonded to a metal atom

Acidity of the hydrogen atom bonded to a metal atom
Organometallic chemistry - Hydrogen ligand and corresponding derivatives

Author : Yves JEANNIN

Review date: March 30, 2015 | Lire en français

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3. Acidity of the hydrogen atom bonded to a metal atom

The first known metal-hydrogen bonded compounds are [HCo(CO)₄] and [H₂Fe(CO)₄]. These hydride ligands correspond, most of the time, to a bond polarity ${métal}^{δ +} H^{δ -}$ , rarely to ${métal}^{δ -} H^{δ +}$ . In water, this translates into acidity. For 20 years after their discovery, it was believed that hydrogen was bonded to the oxygen atom of a CO molecule. The first argument put forward to justify...