A hydrocarbon with several carbon-carbon double bonds, especially one having a chain of conjugated single and double bonds.
- As the chromophore is a polyene, there are several double bonds capable of isomerization.
- In nonpolar polyenes the lowest-lying funnel corresponds to a 3 kink with both double and adjacent single bonds twisted, which may initiate hula-twist isomerization.
- They have anchored bimetallic catalysts, such as a ruthenium-tin catalyst, to the insides of such molecular sieves and have found that they can selectively hydrogenate cyclic polyenes.
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