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Cycloheptene
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Cycloheptene
Cycloheptene is a 7-membered cycloalkene with a flash point of −6.7 °C. It is a raw material in organic chemistry and a monomer in polymer synthesis.[not in body] Cycloheptene can exist as either the cis- or the trans-isomer.
Under normal conditions, the cycloheptene double bond forms the cis isomer. However, the unstable, anti-Bredt, trans isomer is an accessible reactive intermediate. Methyl benzoate catalyzes singlet photosensitization; irradiating cis-cycloheptene and it with ultraviolet light at −35 °C produces a detectible trans-cycloheptene population.
The trans isomer is very strained, and the unsaturated carbons are partly pyramidal. The pyramidalization angle is estimated at 37° and the p orbital misalignment 30.1°. The isomer decomposes facily through a dimolecular, diradical pathway, even at temperatures too low for double-bond rotation.
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Cycloheptene
Cycloheptene is a 7-membered cycloalkene with a flash point of −6.7 °C. It is a raw material in organic chemistry and a monomer in polymer synthesis.[not in body] Cycloheptene can exist as either the cis- or the trans-isomer.
Under normal conditions, the cycloheptene double bond forms the cis isomer. However, the unstable, anti-Bredt, trans isomer is an accessible reactive intermediate. Methyl benzoate catalyzes singlet photosensitization; irradiating cis-cycloheptene and it with ultraviolet light at −35 °C produces a detectible trans-cycloheptene population.
The trans isomer is very strained, and the unsaturated carbons are partly pyramidal. The pyramidalization angle is estimated at 37° and the p orbital misalignment 30.1°. The isomer decomposes facily through a dimolecular, diradical pathway, even at temperatures too low for double-bond rotation.
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