Williams, Jack L. R. published the artcilePhotochemical decomposition of triphenylboron and its complexes, HPLC of Formula: 971-66-4, the publication is Journal of the American Chemical Society (1967), 89(17), 4538, database is CAplus.
In the direct photolysis of triphenylboron (I) in solution and N atm. by 2537 A. radiation, the formation of hydrocarbon products depended on the nature of the solvent. With I in cyclohexane, the products were only phenol and phenylboronic acid. When I was irradiated in MeOH solution, biphenyl and diene mixtures of products were obtained in low yields. Under similar conditions in MeOH solution, the piperidine complex of I yielded 32% biphenyl, 26% 1-phenyl-1,3-cyclohexadiene, 23% 1-phenyl-1,4-cyclohexadiene, and a small amount of 2-phenyl-1,3-cyclohexadiene. Similarly, the pyridine complex of I gave 63% biphenyl, 10% 1-phenyl-1,4-cyclohexadiene, 7% 3-phenyl-1,4-cyclohexadiene, and 4% 1-phenyl-1,3-cyclohexadiene. Since the absorption maximum of I depended also on the nature of the solvent, it was concluded that the alc. mol. donated an electron pair to the B atom to promote the “ate”-type photochem. rearrangement.
Journal of the American Chemical Society published new progress about 971-66-4. 971-66-4 belongs to pyridine-derivatives, auxiliary class Pyridine,Benzene, name is Triphenyl(pyridin-1-ium-1-yl)borate, and the molecular formula is C17H16O2, HPLC of Formula: 971-66-4.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem