MolSynapsequestion bank

MolSynapse / Question bank / General Organic Chemistry I: Electronic Effects / Aromaticity, antiaromaticity and Huckel rule

JEE Main levelSingle correct optionDifficulty 2 of 3g1140

Which of the following is NOT aromatic because it lacks a continuous cyclic conjugation of p orbitals?

Afuran
Bbenzene
Cpyridine
Dcyclopenta-1,3-diene

Answer: D

Cyclopenta-1,3-diene has an sp3 carbon (

CH X_{2}

) in the ring, which interrupts cyclic conjugation. Benzene, pyridine and furan are cyclic, planar and have 6 pi electrons.

Practice General Organic Chemistry I: Electronic Effects More on Aromaticity, antiaromaticity and Huckel rule

Previous questionNext question

More questions on Aromaticity, antiaromaticity and Huckel rule

The cyclopropenyl cation, C3H3+, is JEE Main level
The number of pi electrons contributed by the oxygen atom of furan to its aromatic sextet is JEE Main level
Naphthalene is aromatic because it contains JEE Main level
Assertion (A): The cyclopentadienyl anion is aromatic. Reason (R): It is planar, cyclic, fully conjugated and has 6 pi electrons. JEE Main level
Benzene mostly undergoes substitution rather than addition because JEE Main level
Which of the following are antiaromatic? JEE Main level