Answers are grounded in this paper and cite their sources.
Two new tricyclic 1,2-azaboratabisnorcaradiene molecules (1 b and 2 b) generated through the photoisomerization of N-methyl-2-phenylimidazolyl-chelated dimesitylboranes (1 a and 2 a) have been found to undergo unusual photoisomerization, producing the first examples of 1,2-azaborabenzotropilidenes (1 c and 2 c), accompanied by a distinct color change, upon irradiation at 350 nm. Compounds 1 c and 2 c contain a conjugated alkylideneborane unit and can be fully reverted back to 1 b and 2 b, and subsequently to 1 a and 2 a upon heating. The mechanistic pathway of the new isomerism has been established to involve "walk" rearrangements by DFT computational studies.
No takes yet. Share an insight, caveat, or question.
Rao et al. (2014) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: