Direct observation of conjugated bis-ketene and ketene–ketenimine intermediates in the photolysis of diphenylcyclobutenedione derivatives
- 1 January 1971
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society D: Chemical Communications
- No. 11,p. 587-588
- https://doi.org/10.1039/c29710000587
Abstract
The photolysis of diphenylcyclobutenedion (Ia) and its imine derivative (Ib) in the presence of an isonitrile gives ring-expanded products (IIIa) and (IIIb)via conjugated bis-ketene (IIa) and ketene-ketenimine (IIb) intermediates, which were confirmed by the photolysis of (I) in methanol to give succinate (IV) and directyl by i.r. spectroscopy during low temperature photolysis.Keywords
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