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  4. Zingerone having molecular formula C11H14O3 is constituent of ginger. It gives following test: Reagent Observation Neutral FeCl3 Violet colouration 2,4-D.N.P. Yellow orange colouration NaOI Yellow ppt. Zingerone on bromination with bromine water produces monobrominated product. Structure of zingerone will be?

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Q. Zingerone having molecular formula $C_{11}H_{14}O_{3}$ is constituent of ginger. It gives following test:
Reagent Observation
Neutral $FeCl_3$ Violet colouration
2,4-D.N.P. Yellow orange colouration
$NaOI$ Yellow ppt.
Zingerone on bromination with bromine water produces monobrominated product. Structure of zingerone will be?

NTA AbhyasNTA Abhyas 2022

Solution:

Nuetral $FeCl_{3}$
Blue colouration $ \rightarrow$ Phenolic group
Solution
With bromine water produce monobrominated product $ \rightarrow $ only one ortho position is left.
Solution