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15240672380's Question
Chemistry
Posted 10 months ago

In an experimental setup, a novel organic compound, L, with a molecular formula C7H8O2\mathrm{C} 7 \mathrm{H} 8 \mathrm{O} 2, is synthesized. This compound exhibits unique reactivity patterns: it forms pink complex with FeCl3\mathrm{FeCl} 3 solution, suggesting phenolic OH\mathrm{OH} groups, and it gives a positive iodoform test, indicative of a methyl ketone group. Additionally, L does not decolorize bromine water, implying it does not have carbon-carbon double bonds. Based on these observations and the principles of organic chemistry, what is the most likely structure for compound L? Options: a) 4-hydroxyacetophenone b) 2 hydroxybenzoic acid (salicylic acid) c) 3-hydroxybenzaldehyde d) 1,4-dihydroxy-2butanone
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Answer from Sia
Posted 10 months ago
A
Key Concept
Identification of functional groups through chemical tests
Explanation
The compound L forms a pink complex with FeCl3\mathrm{FeCl}_3 indicating the presence of a phenolic OH\mathrm{OH} group, and gives a positive iodoform test, which is characteristic of a methyl ketone group. The absence of reaction with bromine water suggests there are no carbon-carbon double bonds. Among the options, 4-hydroxyacetophenone has both a phenolic OH\mathrm{OH} group and a methyl ketone structure, which aligns with the given reactivity patterns.

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