Sodium reduction of the magnesium diamide, [{SiNDipp}Mg] [{SiNDipp} = {CH2SiMe2N(Dipp)}2; Dipp = 2,6-i-Pr2C6H3], provides the Mg(I) species, [{SiNDipp}MgNa]2 (1), in which the long Mg-Mg bond (&gt;3.2 Å) is augmented by persistent Na-aryl interactions. Computational assessment (DFT/QTAIM) indicates that this molecule is best considered to comprise a contiguous tetrametallic core. This viewpoint is borne out by its treatement with a variety of two electron bases and reducible small moleucles (e.g. CO, H2), in which onward reactivity is mediated by the dissimilar metal centers. This presentation will report our most recent observations of this unusual species and related compounds.

Cooperative small molecule reduction by low oxidation state s-block heterobimetallics

ACS Spring 2022

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