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The structural formula of a compound is given - HSC - SSCE Chemistry - Question 3 - 2023 - Paper 1
Question 3
The structural formula of a compound is given. ``` H H H H - C = C = C - H H H H ``` What is the preferred IUPAC name of this compound? A. Pent-2-ene B. Pen... show full transcript
Worked Solution & Example Answer:The structural formula of a compound is given - HSC - SSCE Chemistry - Question 3 - 2023 - Paper 1
Step 1
What is the preferred IUPAC name of this compound?
Answer
To determine the preferred IUPAC name of the compound, we need to analyze its structure.
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Identify the Longest Carbon Chain: From the structural formula, we can observe that the longest continuous chain of carbon atoms contains five carbons: C1, C2, C3, C4, and C5.
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Identify the Type of Bonds: The compound contains a triple bond between C2 and C3. Since there is a triple bond, we classify this compound as an alkyne.
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Number the Carbon Chain: To assign the correct IUPAC name, we number the carbon chain from the end closest to the triple bond. In this case, starting from C1 to C5 gives the positions of the triple bond as follows:
- C2 and C3 are the carbons involved in the triple bond.
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Construct the Name: The name for a five-carbon alkyne is based on the root word 'pent' for five carbons, combined with 'yne' to indicate a triple bond. The correct position for the triple bond is at C2, making the correct IUPAC name 'Pent-2-yne'.
Therefore, the preferred IUPAC name of this compound is Pent-2-yne.