3.26(a)Three isomers of C5H8contain two rings and have no alkyl substituents:(b)Five isomers of C6H10contain two rings and have no alkyl substituents:3.27(a)The heat of combustion is highest for the hydrocarbon with the greatest number of carbons.Thus, cyclopropane, even though it is more strained than cyclobutane or cyclopentane, has thelowest heat of combustion.A comparison of heats of combustion can only be used to assess relative stability when thecompounds are isomers.(b)All these compounds have the molecular formula C7H14. They are isomers, and so the onewith the most strain will have the highest heat of combustion.H3CCH3CH3H3C1,1,2,2-Tetramethylcyclopropane(high in angle strain; bonds areeclipsed; van der Waals strainbetween cis methyl groups)Heat of combustion
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This note was uploaded on 09/20/2011 for the course CHM 2210 taught by Professor Reynolds during the Spring '01 term at University of Florida.