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Updated: Jan 3, 2026

Characterizing Lewis Pairs Using Titration Coupled with In Situ Infrared Spectroscopy
Published on: February 20, 2020
Synthesis and structures of gallaarsenes LGaAsGa(X)L featuring a Ga-As double bond
Juliane Schoening1, Lukas John1, Christoph Wölper1
1Faculty of Chemistry, University of Duisburg-Essen and Center for Nanointegration Duisburg-Essen (CENIDE); Universitätsstr. 7, S07 S03 C30, D-45141 Essen, Germany. stephan.schulz@uni-due.de.
Abstract:
Three equivalents of LGa {L = HC[C(Me)N(2,6-i-Pr2C6H3)]2} react with AsX3 (X = Cl, Br) by insertion into two As-X bonds, followed by the elimination of LGaX2 and formation of LGaAsGa(Cl)L (1) and LGaAsGa(Br)L (2). According to single crystal X-ray analysis, 1 and 2 each exhibit one Ga-As single bond and one Ga-As double bond. The π-bonding contribution (9.71 kcal mol-11 and 9.44 kcal mol-12) was proved by variable temperature (VT) 1H NMR spectroscopy, while the electronic structure of 1' was studied by quantum chemical calculations.
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