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Why does acetic anhydride does not show iodoform test even though it has a CH3-C=0 group whereas cyclohexan-1,3-dione shows iodoform test even though it does not have a CH3-C=O nor CH3-CH(OH) group?

Why does acetic anhydride does not show iodoform test even though it has a CH3-C=0  group whereas cyclohexan-1,3-dione shows iodoform test even though it does not have a CH3-C=O  nor CH3-CH(OH) group?  

Grade:12

3 Answers

Ashutosh Mohan Sharma
askIITians Faculty 180 Points
5 years ago
iodoform test is used to identify carbonyl groups of ketone . since acid anhydride is an completly different group from ketone it doesnt show positive iodoform test.
Gowri sankar
292 Points
5 years ago
Iodoform test is used to identify carbonyl groups of ketone . since acid anhydride is an completly different group from ketone it doesnt show positive iodoform test.
 
Nikhil Upadhyay
171 Points
5 years ago
acetic anhydride is not a ketone (Since iodoform test is only for ketones.) whereas the other compund mentioned has a ch3-co group attached if you see therfore it gives +ve iodoform test)

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