Advertisements
Advertisements
प्रश्न
Give a plausible explanation for the following:
Why are amines less acidic than alcohols of comparable molecular masses?
Advertisements
उत्तर
Loss of a proton from an amine gives an amide ion, while loss of a proton from alcohol gives an alkoxide ion.
\[\ce{R-NH2 -> R-NH– + H+}\]
\[\ce{R-O-H -> R-O^- + H+}\]
Since O is more electronegative than N, it will attract positive species more strongly in comparison to N. Thus, RO− is more stable than RNH−. Thus, alcohols are more acidic than amines. Conversely, amines are less acidic than alcohols.
APPEARS IN
संबंधित प्रश्न
Give the structure of A, B and C in the following reaction:
\[\ce{C6H5NO2 ->[Fe/HCl] A ->[NaNO2 + HCl][273 K] B ->[H2O/H+][\Delta] C}\]
Name the process of breaking C-X bond by ammonia in preparation of amines.
Why cannot aniline be prepared by Gabriel phthalimide synthesis?
Identify the product obtained, when benzamide is treated with bromine and aqueous sodium hydroxide.
Identify the product obtained when benzyl chloride undergoes ammonolysis in presence of excess ammonia followed by the reaction with two moles of methyl iodide.
Identify 'A' and 'B' in the following conversions.
\[\ce{CH3 - I ->[Alc. KCN][\Delta] A ->[Na/C2H5OH] B}\]
Identify the INCORRECT statement regarding Hofmann bromamide reaction.
In aqueous phase the order of basic strength of alkylamine is ______.
Which of the following does NOT give carbylamine test?
Given below are two statements labelled as Assertion (A) and Reason (R).
Assertion (A): Alkyl halides are insoluble in water.
Reason (R): Alkyl halides have halogen attached to sp3 hybrid carbon.
Select the most appropriate answer from the options given below:
The source of nitrogen in Gabriel synthesis of amines is ______.
The best reagent for converting, 2-phenylpropanamide into 1- phenylethanamine is ______.
Which of the following methods of preparation of amines will give same number of carbon atoms in the chain of amines as in the reactant?
What is the product when \[\ce{C6H5CH2NH2}\] reacts with \[\ce{HNO2}\]?
How will you carry out the following conversions?
Describe Gabriel's phthalimide synthesis. (Give reaction)
Identify the product ‘C’ in the following reaction.
\[\ce{Aniline ->[(CH3CH)2O][Pyridine] A ->[Br2][CH3COOH] B ->[H^+ or OH^-] C}\]
Write the name of the product formed by the action of LiAlH4/ether on acetamide.
Identify A and B in the following reaction.
\[\ce{C6H5CH2Br ->[Alco.][KCN] A ->[Na/Ethanol][reduction] B}\]
Write a short note on Ammonolysis.
