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What happen when acetaldehyde is treated with hydrazine?

(D) Phosphorus pentachloride. Hint: Acetaldehyde is an aldehyde that is highly reactive and toxic. -When an aldehyde is reacted with dilute aqueous caustic soda it undergoes an aldol reaction. -When it is reacted with hydrazine it undergoes Wolff-Kishner reaction.

Does Wolff Kishner reduce amides?

Amides are usually not suitable substrates for the Wolff–Kishner reduction as demonstrated by the example above. Coe and coworkers found however that a twisted amide can be efficiently reduced under Wolff–Kishner conditions.

Does Wolff Kishner reduce Nitro?

The methods most commonly used for deoxygenation of carbonyl groups to alkanes are the Clemmensen reduction,1 the Wolff-Kishner reaction,2,3 and the Mozingo reduction. Similarly, Zn can be used for the reduction of aromatic nitro compounds to anilines, but still requires the use of a heavy metal.

Can NaBH4 reduce nitro groups?

NaBH4 in the presence of catalytic amounts of Ni(OAc)2. 4H2O reduces varieties of nitro compounds to their corresponding amines. Reduction reactions were carried out in a mixture of CH3CN and H2O (3.0:0.3 ml) at room temperature with high to excellent yields of products.

Can Clemmensen reduction reduce nitro group?

Zn−Hg/HCl has reduced both the ketonic and nitro group.

Why acetaldehyde does not give Cannizzaro reaction?

Cannizzaro reaction is given by aldehydes which do not have α-hydrogen atom. e.g. HCHO, C6H5CHO etc. Acetaldehyde, CH3CHO has α-hydrogen atoms. Therefore, it does not undergo cannizzaro reaction.

Why acetaldehyde gives aldol condensation while formaldehyde does not?

since formaldehyde(i-e HCHO) has only 1 carbon which is the carbonyl carbon (i-e the functional group) and there is no alpha-carbon present and hence no alpha-hydrogen, so formaldehyde doesn’t undergo aldol condensation. e.g Acetaldehyde can undergo aldol condensation since it has alpha-hydrogens!

Why carboxylic acids do not give the characteristic reactions of carbonyl group?

Carboxylic acids do not give characteristic reaction of carbonyl group. This is because the lone pairs on oxygen atom attached to hydrogen atom in the -COOH group are involved in resonance thereby making the carbon atom less electrophilic. Hence, carboxylic acids do not give characteristic reaction of carbonyl group.

Which of the following compounds does not undergo aldol condensation?

Formaldehyde HCHO does not contain alpha hydrogen atom. Hence, it does not undergo aldol condensation reaction.

Which of the following compounds is least reactive with NaHSO3?

Aromatic ketones are less reactive than aliphatic ketones which in turn are less reactive than aldehydes. Hence, acetophenone does not react with NaHSO3.

Which will give aldol condensation?

An aldol condensation is a condensation reaction in organic chemistry in which an enol or an enolate ion reacts with a carbonyl compound to form a β-hydroxyaldehyde or β-hydroxyketone (an aldol reaction), followed by dehydration to give a conjugated enone.