✦ LIBER ✦

Magnetic field effects on the intramolecular hydrogen abstraction reaction of polymethylene-linked systems

✍ Scribed by Yoshifumi Tanimoto; Masanobu Takashima; Kiyoshi Hasegawa; Michiya Itoh

Publisher: Elsevier Science
Year: 1987
Tongue: English
Weight: 508 KB
Volume: 137
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(87)80894-1

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✦ Synopsis

The magnetic field effect on the intramolecular hydrogen abstraction of a-(xanthone-2-carbonyloxy)-w-(xanthene-2-carbonyloxy)alkanes (X0-n-XH, n=2-12), in bichromophoric compounds, was studied using laser flash photolysis. Excited triplet X0 abstracts a hydrogen atom from the XH moiety, generating a biradical of xanthenyl and xanthone ketyl radicals. The magnitude of the magnetic field effect on the lifetime of the xanthenyl radical increases with increasing chain length n and reaches a constant value at n z 6.

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