Journal of the American Chemical Society p. 9194 - 9198 (1989)
Update date:2022-08-05
Topics:
Hegedus, Louis S.
Lundmark, Bruce R.
The dark reaction between cis-azobenzene and pentacarbonyl<(methoxy)(methyl)carbene>chromium(0) was followed by 1H NMR spectroscopy.The intervention of two discrete intermediates-thought to be a zwitterion and a metallacycle-was detected.Carrying out the reaction in hexane under a carbon monoxide atmosphere caused the reaction to stop at the metallacycle stage.Photolytic decomposition of this produced 1,3-diazetidinone and imidate products, as well as small amounts of azobenzene. 1,2-Diazetidinone products were thought to result from a primary photoreactionbetween cis-azobenzene and a photogenerated (methoxy)(methyl)ketene chromium complex.
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