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allylic hydrogen |
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allylic hydrogen [ə′lil·ik ′hī·drə·jən] (organic chemistry) In an organic molecule, a hydrogen attached to a carbon atom that is adjacent to a double bond. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Elastomers with low degrees of unsaturation provide the least amount of reversion, while reversion is promoted in unsaturated rubber containing high allylic hydrogen content. It has been suggested that the loss in scorch safety is primarily attributed to the elimination of degradative chain transfer reactions as the groups of Type I coagents quickly react with the alkoxy radical and do not possess an allylic hydrogen. However, at normal use levels, an aromatic oil, which can contain a significant concentration of benzylic and allylic hydrogen atoms, will have a significant effect. |
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