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Which statement does not support the suggestion that an unknown organic compound is H<sub>3</sub>C - C(=O) - CH<sub>2</sub> - CH<sub>3</sub> A - AQA - A-Level Chemistry - Question 11 - 2021 - Paper 3
Question 11
Which statement does not support the suggestion that an unknown organic compound is H<sub>3</sub>C - C(=O) - CH<sub>2</sub> - CH<sub>3</sub> A. Its <sup>1</sup>H NM... show full transcript
Worked Solution & Example Answer:Which statement does not support the suggestion that an unknown organic compound is H<sub>3</sub>C - C(=O) - CH<sub>2</sub> - CH<sub>3</sub> A - AQA - A-Level Chemistry - Question 11 - 2021 - Paper 3
Step 1
Which statement does not support the suggestion that an unknown organic compound is
Answer
To determine which statement does not support the claim about the organic compound, we need to analyze each option:
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A. Its <sup>1</sup>H NMR spectrum has 3 peaks with an integration ratio of 2:3:3: This supports the structure as it indicates the presence of different types of hydrogens in the compound.
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B. Its <sup>13</sup>C NMR spectrum has 3 peaks: This statement, while accurate, does not rule out the compound's proposed structure, as it suggests the expected environments for carbons in the structure.
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C. Its infrared spectrum has an absorption at 1735 cm<sup>-1</sup>: This is indicative of a carbonyl (C=O) group, which supports the structure.
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D. It has 36.36% by mass of oxygen and 9.09% by mass of hydrogen: This information helps to calculate the compound's empirical formula and proportions, and does not contradict the proposed structure.
After analyzing all options, the statement that does not support the suggestion that the compound is the given structure is B since the presence of specifically 3 peaks in the <sup>13</sup>C NMR spectrum does not help confirm the proposed structure effectively.