THE 353 NM 1N-PI-ASTERISK TRANSITION OF 4H-PYRAN-4-ONE AND A DEUTERATED DERIVATIVE

Authors
GORDON RD PARK WKC
Citation
Rd. Gordon et Wkc. Park, THE 353 NM 1N-PI-ASTERISK TRANSITION OF 4H-PYRAN-4-ONE AND A DEUTERATED DERIVATIVE, Canadian journal of chemistry, 71(10), 1993, pp. 1672-1675
Citations number
14
Categorie Soggetti
Chemistry
Journal title
Canadian journal of chemistry → ACNP
ISSN journal
00084042
Volume
71
Issue
10
Year of publication
1993
Pages
1672 - 1675
Database
ISI
SICI code
0008-4042(1993)71:10<1672:T3N1TO>2.0.ZU;2-6
Abstract
The 353 nm vapour absorption of 4H-pyran-4-one, and its 3,5-d2 derivat ive, has been measured and assigned to a forbidden, 1A2 (npi) - 1A1 e lectronic transition, with electronic origin near 28 360 cm-1, made al lowed by vibrations involving out-of-plane ring and C-H motions. Altho ugh the molecule remains planar upon excitation, other effects of conj ugation on the nature of the excited state are less marked than in 2-c yclopenten-1-one.