Differences in reactivity among 1Fe, 1Co, and 1Ni in the single-electron  reduction process to MI species and the subsequent protonation to yield  the MIII-H species under photochemical conditions

June 19, 2024

• Title:       

  Differences in reactivity among 1_Fe, 1_Co, and 1_Ni in the single-electron  reduction process to M^I species and the subsequent protonation to yield  the M^III-H species under photochemical conditions

• Image Source:

  Photo- and electrocatalytic H2 production by new first-row transition-metal complexes based on an aminopyridine pentadentate ligand

• Mark:

  Scheme 2

• Associated context:

  In contrast, the reduction potential of -1.42 V for the Fe^II/I couple agrees with the electrochemically observed of -1.58 V, revealing that the Fe^I species may not be photochemically generated. This situation bans the possible formation of Fe^III-H species  (pK_a 1.8, also disfavoured), and then the capacity to photoproduce H₂ (CAS 1333-74-0) when using PS_Ir as photosensitiser (Scheme 2).