13. Alkenes, Alkynes, and Aromatic Compounds

Which of the following compounds are capable of cis–trans isomerism?

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b. <IMAGE>

c. <IMAGE>

Why do you suppose small-ring cycloalkenes like cyclohexene do not exist as cis–trans isomers, whereas large ring cycloalkenes like cyclodecene do show isomerism?

Name all unbranched ether and alcohol isomers with formula C₅H₁₂O and write their structural formulas.

Identify the compounds in each of the following pairs as structural isomers or not structural isomers: (11.3)

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Indicate whether each of the following pairs represent structural isomers or the same molecule:

b. <IMAGE>

Identify the following pairs of structures as structural isomers, cis–trans isomers, or the same molecule: (11.5, 11.6)

a. <IMAGE>

Draw the condensed structural formulas for all the possible haloalkane isomers that have four carbon atoms and a bromine. (11.3)

Indicate whether each of the following pairs represent structural isomers or the same molecule:

a. <IMAGE>