pentadiene
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pentadiene
[¦pen·tə′dī‚ēn] (organic chemistry)
C5H8 Any of several straight-chain liquid diolefins: CH3CH2CH=C=CH2, a colorless liquid boiling at 45°C, also known as ethylallene; CH3CH=CHCH=CH2, a colorless liquid boiling at 43°C; CH2=CHCH2CH=CH2, a colorless liquid boiling at 26°C.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.