Question

question 7 (1 point)
a structural diagram for 2 - butene shows the ch₃ groups on the same side of the carbon atom. this compound is ________.
○ a) cis - 2 - butene
○ b) trans - 2 - butene
○ c) 2 - butanol
○ d) di - methylbutene
○ e) none of the above

Explanation:

In organic chemistry, cis - trans isomerism (geometric isomerism) occurs in alkenes. For 2 - butene (\(CH_3CH = CHCH_3\)), if the two \(CH_3\) groups are on the same side of the double - bond (carbon - carbon double bond), it is called cis - 2 - butene. Trans - 2 - butene has the \(CH_3\) groups on opposite sides of the double bond. 2 - butanol (\(CH_3CH(OH)CH_2CH_3\)) has an \(-OH\) group (it is an alcohol, not an alkene). Di - methylbutene is not a proper IUPAC name for a simple butene isomer in the context of this basic isomerism question.

Answer:

A. cis - 2 - butene