This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
The compound given is HC CCH_3. Step 1: Identify the functional group. The presence of a carbon-carbon triple bond (C C) indicates that this compound is an alkyne. Step 2: Determine the longest carbon chain containing the triple bond. The compound has three carbon atoms in a continuous chain: C-C C. Step 3: Name the parent alkyne. A three-carbon chain is based on "propane". Since it's an alkyne, the suffix changes to "-yne". Thus, the systematic IUPAC name is propyne. For a three-carbon alkyne, the triple bond can only be at the first position, so it's often simply called propyne (or prop-1-yne). Step 4: Evaluate the given options. A) Acetylene: This is the common name for ethyne (HC CH), which has two carbon atoms. This is incorrect. B) Methyl acetylene: This is a common name for propyne (HC CCH_3). It can be thought of as an acetylene molecule (HC CH) where one hydrogen atom has been replaced by a methyl group (CH_3). This matches the given compound. C) Butanol: This is an alcohol with four carbon atoms (C_4H_9OH). This is incorrect. D) Decanoic acid: This is a carboxylic acid with ten carbon atoms (CH_3(CH_2)_8COOH). This is incorrect. Although the question asks for the IUPAC name and "propyne" is the strict IUPAC name, "methyl acetylene" is a widely accepted common name for propyne and is the only option that correctly identifies the given compound. In multiple-choice questions, if the systematic IUPAC name is not provided, a correct and unambiguous common name is often the intended answer. The correct option is B. The final answer is B) Methyl acetylene.