Multiple Choice
Which of the following is the correct common name for the compound with the IUPAC name ?
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4. Alkanes and Cycloalkanes
IUPAC Naming
Multiple Choice
Given the following reaction: is treated with aqueous . Draw the major organic product and select the correct IUPAC name for this product.
A
B
C
D
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Verified step by step guidance1
Identify the structure of 2-bromopentane: it is a five-carbon chain (pentane) with a bromine atom attached to the second carbon.
Recognize that aqueous KOH is a nucleophilic substitution reagent that can replace the bromine atom with a hydroxyl group (OH) via an SN2 or SN1 mechanism depending on the substrate.
Replace the bromine atom on carbon 2 with an OH group to form an alcohol, resulting in 2-pentanol as the major organic product.
Confirm the IUPAC name by numbering the carbon chain to give the hydroxyl group the lowest possible number, which is carbon 2 in this case, so the correct name is pentan-2-ol.
Note that other options like pentan-2-one (a ketone) or pent-1-ene (an alkene) do not correspond to the substitution reaction with aqueous KOH on 2-bromopentane.
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