Home
Class 11
CHEMISTRY
Pyridine like benzene, has six pi -elect...

Pyridine like benzene, has six `pi` -electrons in delocalized `pi` -orbitals, but unlike benzene the orbitals will be deformed as electrons are more attracted towards the nitrogen atom because of its high electro negativity. This is reflected in the dipole of pyridine which has the negative end on N and the positive end on the nucleus. We can compare the respective properties of benzene, pyridine, pyrrole, furan and thiophene, which very frequently give aromatic electrophilic and nucleophilic substitution reactions in different positions.
Nitration, chlorination, bromination of pyridine is very difficult at normal conditions. Why?

A

High aromaticity of pyridine than benzene

B

Pyridine has an lone pair of e-s on nitrogen so it protonates

C

pyridine has 5 carbon atoms

D

pyridine is cyclic compound.

Text Solution

Verified by Experts

The correct Answer is:
B
In pyridine .N. is highly EN. So it protonates and can behave as Lewis base.
Promotional Banner

Topper's Solved these Questions

  • HYDROCARBONS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE SHEET ( LEVEL-II (LECTURE SHEET (ADVANCED) (INTEGER TYPE QUESTIONS )))|21 Videos

  • HYDROCARBONS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE SHEET ( LEVEL-II (LECTURE SHEET (ADVANCED) (MATRIX MATCHING TYPE QUESTIONS )))|10 Videos

  • HYDROCARBONS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE SHEET ( LEVEL-II (LECTURE SHEET (ADVANCED) (LINKED COMPREHENSION TYPE QUESTIONS(PASSAGE-V))))|3 Videos

  • GENERAL ORGANIC CHEMISTRY

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|35 Videos

  • HYDROGEN AND ITS COMPOUNDS

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|20 Videos

Similar Questions

Explore conceptually related problems

Pyridine like benzene, has six pi -electrons in delocalized pi -orbitals, but unlike benzene the orbitals will be deformed as electrons are more attracted towards the nitrogen atom because of its high electro negativity. This is reflected in the dipole of pyridine which has the negative end on N and the positive end on the nucleus. We can compare the respective properties of benzene, pyridine, pyrrole, furan and thiophene, which very frequently give aromatic electrophilic and nucleophilic substitution reactions in different positions. Which of the following compounds are aromatic.

Pyridine like benzene, has six pi -electrons in delocalized pi -orbitals, but unlike benzene the orbitals will be deformed as electrons are more attracted towards the nitrogen atom because of its high electro negativity. This is reflected in the dipole of pyridine which has the negative end on N and the positive end on the nucleus. We can compare the respective properties of benzene, pyridine, pyrrole, furan and thiophene, which very frequently give aromatic electrophilic and nucleophilic substitution reactions in different positions. Arrange the following in increasing order of aromatic character.

Why toluene is more reactive than benzene towards electrophilic substitution reactions?

Why toluene is more reactive than benzene towards electrophilic substitution reactions?

Compare the reactivity of benzene and chlorobenzene towards electrophilic substitution reactions.

The number of pi electrons in benzene is

Which is false statement with respect to benzene ?

The presence of delocalized pi - electrons in benzene indicates that it is

Which lithium halide is soluble in pyridine?