| 11. | Above 150 �C, dimerization of the ?-olefins occurs.
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| 12. | Olefins are usually not present at more than 5 % by volume.
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| 13. | It's possible for the vicinal methyl group of the olefin.
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| 14. | Because of this CM and RCM reactions often use alpha-olefins.
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| 15. | Formerly the reaction had been called " olefin disproportionation ."
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| 16. | Polypropylene is another common polyolefin which is made from the olefin propylene.
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| 17. | There are seven commercial processes which oligomerize ethylene to linear alpha olefins.
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| 18. | Moreover, few unwanted by products are formed, such as olefins.
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| 19. | Reactions with imines and nitro-olefins have been reported.
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| 20. | Depending on the substituents, olefins maintain varying degrees of allylic strain.
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