A Transition Metal Lewis Acid/Base Triad System for
Cooperative Substrate Binding
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Abstract
A frustrated
Lewis pair accessory functionality is positioned in
the secondary coordination sphere of a terpyridine ligand (Tpy<sup>BN</sup> = 6-morpholino-2,2′:6′,2″-terpyridine-6″-boronic
acid pinacol ester) to promote directed Lewis acid/base interactions.
Following metalation with VCl<sub>3</sub>, the utility of the metal
Lewis acid/base triad (LABT) is highlighted with N<sub>2</sub>H<sub>4</sub> as a cooperatively coordinated substrate, affording the first
η<sup>2</sup>-[N<sub>2</sub>H<sub>3</sub>]<sup>−</sup> vanadium complex
