Final answer:
The IUPAC name of the compound (CH₃)C. C. C. (CH₃)CH(CH₃) is 3-Methylhex-2-en-4-yne, which is named by identifying the longest carbon chain and the positions of the multiple bonds and substituents to give the lowest possible numbers.
Step-by-step explanation:
The correct IUPAC name for the compound (CH₃)C. C. C. (CH₃)CH(CH₃) is 3-Methylhex-2-en-4-yne. When determining the correct IUPAC name for a compound, it's important to identify the longest carbon chain and the positions of the multiple bonds and substituent groups to ensure the lowest possible number assignment. In this case, the longest carbon chain has six carbon atoms, which designates the prefix 'hex.'
The molecule contains both an alkene (double bond) and an alkyne (triple bond), and the naming conventions prioritize the alkyne. The double bond starts at the second carbon, which is indicated by 'hex-2-en', and the triple bond starts at the fourth carbon, denoted by '4-yne'. Lastly, the methyl group is on the third carbon, which is indicated by '3-Methyl.' The naming follows these priorities and positional numbering to give the molecule its proper IUPAC name.