2020 年 78 巻 6 号 p. 575-584
Transition metal hydride species are important components in a variety of catalytic and stoichiometric reactions. Particularly, their importance in recent synthetic organic and inorganic chemistries cannot be overemphasized. Multimetallic polyhydride compounds are of remarkable interest as they may show synergistic effects through the cooperation of multiple M-H sites. However, studies on molecular multimetallic hydride clusters to date have been mainly based on late transition metals, while the chemistry of multinuclear early transition metal polyhydride clusters has remained relatively unexplored.
This article is intended to overview and highlight recent advances in synthesis of early transition metal hydride clusters composed of rare earth or group 4 transition metals and their unique reactions toward small molecules such as N2, CO, CO2, H2, and aromatic compounds. A new family of d-f heteromultimetallic hydride clusters composed of both rare earth and d-block transition metals are also described. These studies are opening a new avenue of multimetallic early transition metal hydride chemistries.