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cathy Grade:

explain why 2,4,6-trinitro-N,N-dimethylaniline is 40,000 times strong base than 2,4,6-trinitro aniline?

7 years ago

Answers : (2)

879 Points
										Dear student,

Now there are two N atoms having lone pair of electrons contributing to more basicity..

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Askiitians Expert

Sagar Singh

B.Tech, IIT Delhi
7 years ago
Abhi Mishra
34 Points
This is due to the fact that the NMe, group is sufficiently large to interfere sterically with the very large NO, groups in both o-positions. Rotation about ring-carbon to nitrogen bonds allows the 0 atoms of NO, and the Me groups of NMe, to move out of each other's way, but the p orbitals on the N atoms are now no longer parallel to the p orbitals of the ring-carbon atoms. As a consequence, mesomeric shift of the unshared electron pair on NMe, to the oxygen atoms of the NO, groups, via the p orbitals of the ring-carbon atom, is inhibited, and the expected base-weakening-by mesomeric electron-withdrawal-does not take place . The base-weakening influence of the three nitro 
one year ago
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