Which of the set of isomers of C6H4Cl2 is having equal dipole moment with C6H5Cl and C6H6 respectivelya)ortho and metab)meta and parac)ortho and parad)para and orthoCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

The dipole moment of a molecule depends on the magnitude and direction of the bond dipole moments and the molecular geometry. C6H5Cl (chlorobenzene) has a dipole moment of 1.7 D, while C6H6 (benzene) has zero dipole moment.

Out of the isomers of C6H4Cl2 (1,2-dichlorobenzene), the ortho (1,2-) and meta (1,3-) isomers have non-zero dipole moments due to the asymmetrical distribution of the chlorine atoms around the benzene ring.

The para (1,4-) isomer has a zero dipole moment because the two bond dipole moments of the chlorine atoms are oriented in opposite directions, canceling each other out.

Therefore, the isomers that have equal dipole moment with C6H5Cl (1.7 D) are the ortho and meta isomers.

Answer

In meta isomer ghe angle between two cl- is 120 . so if we calculate from formula it will be seame with chlorobenzene. please reply

Answer

Explanation:

Isomers of C6H4Cl2:

C6H4Cl2 has three isomers: ortho-dichlorobenzene, meta-dichlorobenzene, and para-dichlorobenzene.

Dipole moment:

Dipole moment is a measure of the polarity of a molecule. It is defined as the product of the magnitude of the charge and the distance between the charges. The dipole moment of a molecule is a vector quantity and has both magnitude and direction.

Dipole moment of C6H5Cl:

C6H5Cl is chlorobenzene. The dipole moment of chlorobenzene is not zero because there is a difference in electronegativity between carbon and chlorine atoms. The chlorine atom attracts the electron cloud towards itself, creating a partial positive charge on the carbon atom and a partial negative charge on the chlorine atom. This creates a dipole moment in the molecule.

Dipole moment of C6H6:

C6H6 is benzene. The dipole moment of benzene is zero because all the carbon-hydrogen bonds are nonpolar and cancel out each other's dipole moments. This is due to the symmetrical arrangement of the bonds in the benzene ring.

Comparison:

To find the isomer of C6H4Cl2 that has an equal dipole moment with C6H5Cl and C6H6, we need to consider the orientation of the chlorine atoms and their effect on the overall dipole moment of the molecule.

Ortho-dichlorobenzene:

In ortho-dichlorobenzene, the two chlorine atoms are adjacent to each other on the benzene ring. This creates a dipole moment in the molecule.

Meta-dichlorobenzene:

In meta-dichlorobenzene, the two chlorine atoms are separated by one carbon atom on the benzene ring. This also creates a dipole moment in the molecule.

Para-dichlorobenzene:

In para-dichlorobenzene, the two chlorine atoms are opposite to each other on the benzene ring. This creates a dipole moment in the molecule.

Conclusion:

From the comparison, it can be observed that both ortho-dichlorobenzene and meta-dichlorobenzene have a dipole moment, while para-dichlorobenzene does not have a dipole moment. The dipole moment of ortho-dichlorobenzene and meta-dichlorobenzene is not equal to the dipole moment of C6H5Cl and C6H6.

Therefore, the only isomer of C6H4Cl2 that has an equal dipole moment with C6H5Cl and C6H6 is meta-dichlorobenzene. Hence, option 'B' is the correct answer.

Answer

A

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