Journal
ORGANOMETALLICS
Volume 29, Issue 21, Pages 5732-5735Publisher
AMER CHEMICAL SOC
DOI: 10.1021/om100408m
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- Ministry of Education, Culture, Sports, Science, and Technology, Japan
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The reaction of N-Bac-protected bis(5-phenyl-2-pyrrolyl)borane with BF3 center dot OEt2 produced 3-(phenylpyrrolyl)-6-phenyl- 1,2-dihydro-1,2-azaborine in moderate yield. This compound showed (117 absorption band at a longer wavelength compared to that of its benzene analogue and also exhibited an intense red-shifted fluorescence with a high quantum yield close to unity. According to the X-ray structural analysis, cyclic voltammetry, and theoretical calculations, the 1,2-dihydro-1,2-azaborine acts not like a benzene analogue but like a cyclohexadiene analogue in the extended pi-conjugated skeleton.
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