Question

which of the following is a chiral molecule???


see the attachment​

Answer 1

Chirality of any molecule is determined by any disymmetry that can be obtained In the molecule, ie if the molecule is symmetrical by any means, it wouldn't be a chiral molecule

Symmetry in molecules can be found out by many ways.It could be plane of symmetry along plane containing a part of the molecule or it could be a center of symmetry from where all the substituent atoms would be at the same distance from that center.

Here, the only fully unsymmetrical molecule is the molecule In the B option because it neither has any plane of symmetry nor center of symmetry.

For others you can check the plane of symmetry.

For example,

in the first option , the summery can be drawn along the diagonal of the molecule as there will be symmetry.

For second option, there is no way you can draw the symmetry.

For third option, you can draw the plane of symmetry along the side joining the bond between carbons having beta methyl groups.

For fourth option, again you can draw the diagonal planar symmetry.

And so, the only molecule that is unsymmetrical is the one in option B and thus it is the only one which will be chiral.

Hope this helps you !

Answer 2

Answer:

Correct option: B

C$_{1}$ C$_{2}$ are the asymmetrical due to a chiral molecule.

Explanation:

Chiral carbon has four different atoms or groups attached to it and lacks symmetry. Explanation: There are no chiral carbons in option A, and the molecule is also symmetric. Option B has two chiral carbons and no plane of symmetry, indicating that it is a chiral molecule. A chiral or asymmetric carbon atom is one that has four different atoms or groups attached to it. An asterisk is frequently used to indicate such a carbon atom. It is a chiral molecule because it contains two chiral carbons and has no plane of symmetry. Chiral Molecules are molecules that have a chiral structure. If a molecule or ion is non-superimposable, that is, it cannot be superimposed on its mirror image, it is said to be chiral. Chirality is the geometric property of a molecule. Chiral molecules lack a plane of symmetry and a symmetry Centre.