organic chemistry test 2 - worksheet 6

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There are four constitutional isomers having the formula C4H9Cl. Which of the following would be a correct IUPAC name for one of these isomers

1-chloro-2-methylpropane

Which isomer of hexane has only two different sets of structurally equivalent hydrogen atoms?

2,3-dimethylbutane

rank the compounds ethylcyclopropane methylcyclobutane cyclopentane in order of a) increasing heat of combustion b)decreasing stability

a) lowest: cyclopentane highest: ethylpropane b) highest: pentane lowest: ethyl propane

Give two reasons as to why cyclobutane is less stable than cyclohexane

cyclobutane has more bond angle and torsional strength

which has a higher melting point: cyclohexane or hexane?

cyclohexane

cyclopentane exists in what conformation

envelope

rank the following molecules in order of increasing boiling point cyclopentane cyclohexane cycloheptane

lowest: pentane hexane heptane highest

rank the molecules cyclopropane cyclebutane cyclepentane in order of increasing heat of comubustion per CH2 group

lowest: pentane highest: propane

Limiting your answer to cycloalkanes and ignoring steroisomers, how many C6H12

none of the above


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