Give the IUPAC name for the following compound.
A)trans-2-Acetylenecyclohexanol
B)trans-2-Ethynylcyclohexanol
C)trans-2-Acetylene-1-cyclohexanol
D)trans-2-Ethylenecyclohexanol

Question

Give the IUPAC name for the following compound. 
A)trans-2-Acetylenecyclohexanol 
B)trans-2-Ethynylcyclohexanol 
C)trans-2-Acetylene-1-cyclohexanol 
D)trans-2-Ethylenecyclohexanol

Quizplus · Accepted Answer

The compound has a cyclohexane ring with an ethynyl (also known as acetylene) group and a hydroxyl group attached to carbons 2 and 3 respectively. The correct name based on the IUPAC nomenclature rules is "trans-2-ethynylcyclohexanol". Choice A is incorrect because the term "acetylene" is reserved for the triple bonded carbon-carbon fragment, while "ethynyl" is the correct term for a substituent containing a triple bond. Choice C is incorrect because "-ene" suffix implies a double bond, not a triple bond. Choice D is incorrect because it refers to an incorrect bonding involving the ethynyl group.

Give the IUPAC Name for the Following Compound