Bimetallic
H2 Addition and Intramolecular
Caryl–H Activation Mediated by an Iron–Zinc Hydride

Sun, Rui; Jiang, Yang; Chen, Hao-Ran; Jiang, Xuebin; Cao, Yu-Chen; Ye, Shengfa; Liao, Rong-Zhen; Tung, Chen-Ho; Wang, Wenguang

doi:10.1021/acs.inorgchem.4c00454.s001

Bimetallic H₂ Addition and Intramolecular Caryl–H Activation Mediated by an Iron–Zinc Hydride

journal contribution

posted on 2024-03-21, 17:45 authored by Rui Sun, Yang Jiang, Hao-Ran Chen, Xuebin Jiang, Yu-Chen Cao, Shengfa Ye, Rong-Zhen Liao, Chen-Ho Tung, Wenguang Wang

Heteronuclear Fe(μ-H)Zn hydride Cp*Fe(1,2-Cy₂PC₆H₄)HZnEt (3) undergoes reversible intramolecular C_aryl-H reductive elimination through coupling of the cyclometalated phosphinoaryl ligand and the hydride, giving rise to a formal Fe(0)–Zn(II) species. Addition of CO intercepts this equilibrium, affording Cp*(Cy₂PPh)(CO)Fe-ZnEt that features a dative Fe–Zn bond. Significantly, this system achieves bimetallic H₂ addition, as demonstrated by the transformation of the monohydride Fe(μ-H)Zn to a deuterated dihydride Fe–(μ-D)₂–Zn upon reaction with D₂.