Question: Allene, H 2 C = C = CH 2 , has a heat of hydrogenation of - 2 9 8 kJ / mol ( -

Allene, H2C=C=CH2, has a heat of hydrogenation of -298 kJ/mol (-71.3 kcal/mol). Rank a 14-1 conjugated diene, a nonconjugated diene, and an allene in order of stability.

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