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Issue 6, 2002
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Pyrolysis and UV photoelectron spectroscopy of bicyclo[3.2.0]hept-6-en-2-one; preparation and detection of cyclohepta-2(Z),4(E)-dien-1-one

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Abstract

Flash vacuum pyrolysis of bicyclo[3.2.0]hept-6-en-2-one (1) in the source chamber of a UV photoelectron (PE) spectrometer using a CW CO2 laser as a directed heat source facilitated an electrocyclic ring expansion to yield the transient species cyclohepta-2(Z),4(E)-dien-1-one (2), the PE spectrum of which was compared to that of an authentic sample of cyclohepta-2(Z),4(Z)-dien-1-one (4) and confirmed a conrotatory ring opening of 1 that obeys the Woodward–Hoffmann rules.

Graphical abstract: Pyrolysis and UV photoelectron spectroscopy of bicyclo[3.2.0]hept-6-en-2-one; preparation and detection of cyclohepta-2(Z),4(E)-dien-1-one

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Article information


Submitted
19 Dec 2001
Accepted
04 Feb 2002
First published
25 Feb 2002

Chem. Commun., 2002, 648-649
Article type
Communication

Pyrolysis and UV photoelectron spectroscopy of bicyclo[3.2.0]hept-6-en-2-one; preparation and detection of cyclohepta-2(Z),4(E)-dien-1-one

T. Bajorek and N. H. Werstiuk, Chem. Commun., 2002, 648
DOI: 10.1039/B111602A

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