Question

which of these structures represents a chival eta molecule? B) tot 3 - CH₂ EXPLAIN.

Answer 1

For a molecule to be chiral molecule

It should contain chiral carbon and shouldn't have internal plane of symmetry

Let's first define what is a chiral Carbon

A chiral carbon is a carbon that is attached with four different groups

Now

Internal plane of symmetry :It is a plane that divides the molecule which are mirror images to each other

So

In the first one

A)

There are two chiral carbons

Both the carbons are attached with four different groups

But it has a internal plane of symmetry horizontally

Despite containing chiral carbon it is not a chiral molecule as it has internal plane of symmetry

B)

There are two chiral carbons

Both the carbons are attached with four different groups

It doesn't have an internal plane of symmetry

So it is a chiral molecule