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Tetra( o -tolyl)diborane(4), 1, was synthesized and characterized experimentally as well as theoretically by density functional theory (DFT) calculations. Exposure of 1 to H 2 (1 bar) at room temperature afforded the corresponding di( o -tolyl)hydroborane through cleavage of the H–H and B–B bonds. DFT calculations suggested a diarylboryl anion character for the transition state.
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Tsukahara et al. (2017) studied this question.
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