Abstract
With aid of the time-resolved electron spin resonance technique, the photochemical hydrogen abstraction reactions were investigated for the aromatic carbonyl compounds having ππ* characters in their lowest triplet states. When the hydrogen donors having negatively charged hydrogen atoms, such as NaBH 4, Et 3GeH (EtC 2H 5) and n-Bu 3SnH (BuC 4H 9), are used as the hydrogen donors, these ketones reacted readily with them to form non-ketyl radicals, such as cyclohexadienyl-, benzyl- and α-keto alkyl-type radicals instead of their ketyl radicals. The instrinsic reactivity of the ππ* triplet states is inhibited by the positively charged hydrogen atoms in the usual hydrogen donors since they have a strong affinity for the reaction around the negatively charged carbonyl oxygen.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Photochemistry & Photobiology, A: Chemistry
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
