Abstract
The preparation and applications of heterobimetallic complexes continue to occupy researchers in the fields of organometallic, main group, and coordination chemistry. This interest stems from the promise these complexes hold as precursors to materials, reagents in synthesis and as new catalysis. Here we survey and organise the state-of-the-art understanding of the TM-H-M linkage (M = Mg, Zn, Al, Ga). We discuss the structure and bonding in these complexes, their known reactivity, and their largely unrealised potential in catalysis.
Highlights
The catalytic practices of C–H bond functionalisation, dehydrocoupling, hydroboration and hydrosilylation are all attractive prospects for the future chemical economy
A 3-centre 2-electron interaction, the Z2-ligation of E–H to TM can be viewed within the Dewar–Chatt–Duncanson model and interpreted as a combination of: (i) donation of the s-electrons in the E–H bond to a vacant orbital on the transition metal and (ii) back-donation from the metal into the s*-orbital of the same E–H bond
The coordination chemistry of Zn–H–TM and Mg–H–TM groups remains underdeveloped when compared to the aluminium analogues, we have recently reported a series of s-zincane complexes of closely related transition metal carbonyl fragments
Summary
Zinc, aluminium and gallium hydride complexes of the transition metals†. The preparation and applications of heterobimetallic complexes continue to occupy researchers in the fields of organometallic, main group, and coordination chemistry. This interest stems from the promise these complexes hold as precursors to materials, reagents in synthesis and as new catalysis. We survey and organise the state-of-the-art understanding of the TM–H–M linkage (M = Mg, Zn, Al, Ga). We discuss the structure and bonding in these complexes, their known reactivity, and their largely unrealised potential in catalysis
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