The boron analogues of carbenes, borenes or borylenes, are highly reactive and have hardly been characterized by direct spectroscopic techniques. We here report on the first generation and spectroscopic characterization of phenylborylene (1) from Bisazidophenylborane (2) und on some of its photochemically initiated reactions in inert gas matrixes.

Furthermore, we describe the first spectroscopic characterization of a borylnitrene (3), a BN analogue of vinylidene R₂CC, and its thermal and photochemical reactivity in matrixes.

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1. Bromine-Lithium Exchange in 1,2-Dibromobenzene and the Intermediacy of 1,2-Dilithiobenzene