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Consider the following structures - VCE - SSCE Chemistry - Question 3 - 2011 - Paper 1
Question 3
Consider the following structures. I CH3 | H3C-C-CH2-CH-CH3 | | CH2 CH3 II CH3 | H3C-C-CH-CH2-C... show full transcript
Worked Solution & Example Answer:Consider the following structures - VCE - SSCE Chemistry - Question 3 - 2011 - Paper 1
Step 1
Which of the above structures is that of 2,2,4-trimethylpentane?
Answer
To determine which structures represent 2,2,4-trimethylpentane, we need to analyze each one.
Structure I:
- This structure has substituents on the 2nd and 4th carbon atoms, matching the requirements for trimethyl derivatives.
Structure II:
- This does not meet the requirement for 2,2,4-trimethylpentane as it indicates a different arrangement.
Structure III:
- This structure correctly shows methyl groups on the 2nd and 4th carbons as well, meeting the criteria.
Structure IV:
- This structure does not fit the criteria for 2,2,4-trimethylpentane.
Based on this analysis, the structures that represent 2,2,4-trimethylpentane are I and III. Therefore, the correct answer is C: II and III only.