Advertisements
Advertisements
Question
Arrange the following.
In decreasing order of basic strength in gas phase (C2H5)NH2, (C2H5)NH, (C2H5)3N and NH3.
Advertisements
Solution
In the gas phase, solvent effects i.e., stabilization of the conjugate acids due to H-bonding, are absent. Therefore, in the gas phase, basic strength mainly depends upon the +I effect of the alkyl groups. Since the +I effect increases with the number of alkyl groups, therefore the basic strength of the amines decreases as the number of ethyl groups decreases from three in (C2H5)3N to two in (C2H5)2NH to one in C2H5NH2 and zero in NH3.
Basic strength in the gas phase decreases in the order is, (C2H5)3N > (C2H5)NH2 > (C2H5)NH > NH3.
APPEARS IN
RELATED QUESTIONS
What are amines?
Write the number of moles of ethanoyl chloride required for complete acylation of N, N-dimethylaniline.
Assertion: Acetamide on reaction with KOH and bromine gives acetic acid.
Reason: Bromine catalyses hydrolysis of acetamide.
The order of basic strength for methyl substituted amines in aqueous solution is ____________.
Write a short note on the following:
Gabriel phthalimide synthesis
How will you distinguish between primary secondary and tertiary aliphatic amines?
How will you convert diethylamine into N-nitrosodiethylamine?
\[\begin{array}{cc}
\ce{O}\phantom{.........}\\
||\phantom{.........}\\
\ce{H - \underset{(A)}{C} - NH - CH3}
\end{array}\]
and
\[\begin{array}{cc}
\ce{O}\\
||\\
\ce{CH3 - \underset{(B)}{C} - NH2}
\end{array}\]
are which type of isomers?
Assertion A: Aniline on nitration yields ortho, meta and para nitro derivatives of aniline.
Reason R: Nitrating mixture is a storng acidic mixture.
In the light of the above statements, choose the correct answer from the options given below:
Write short note on the following.
Ammonolysis
