Reaction With Semicarbazide

Write the names and structures of the products formed by the following reactions : ( i) addition of HCl to acetone . (ii ) Reaction of semicarbazide with formaldehyde . (iii ) Addition of Grignard reagent to butanone (iv ) Reaction of acetophenone with hydrazine in strong base . (v ) Reaction of PCl_5 and propanone

Arrange the following compounds in decreasing order of nucleophilic addition with semicarbazide NH_(2)NHCONH_(2) i.e., ddot(N)H_(2)-ddot(Z)

Aldehydes and ketones undergo nucleophilic addition reactions. With weak nucleophiles such as ammonia and its derivatives, (H_2 N-Z) , aldehydes and ketones react in weakly acidic medium to form compounds containing carbonnitrogen double bond with the elimination of water to form . Aldehydes can be easily oxidised to carboxylic acid on treatment with common oxidising agents like KMnO_4 K_2 Cr_2 O_7 , HNO_3 , etc. The carboxylic acid formed contain the same number of carbon atoms as the aldehydes. However ketones under drastic conditions with powerful oxidising agents undergo cleavage of C-C bond giving mixture of carboxylic acids having lesser number of C atoms than the original ketone. Write the reaction of acetone with semicarbazide.