Alkyl Groups with -Bonds H2C安 H2C-CH H2C=CH一CH2之 A methylene group C2004 Thomson-Brooks/Cole A vinyl group An allyl group CH-CH2 a vinyl group CH2CH-CH2 (or ethenyl) 人an allyl group (or 2-propenyl) Br cis 1-bromo-3-vinyl cyclohexane 4-allyl cyclopentene a phenyl group 3-phenyl-1-nonene Alkyl Groups with p-Bonds CH=CH2 Br cis 1-bromo-3-vinyl cyclohexane a vinyl group CH2 CH=CH2 4-allyl cyclopentene (or ethenyl) an allyl group (or 2-propenyl) a phenyl group 3-phenyl -1-nonene