Question

The structures to two compound `(I)` and `(II)` are given below. Which statement is correct ?
`F_(2)C=C=CF_(2)(I)` and `F_(2)C=C=C=CF_(2)(II)`
A. Compound `(I)` is resolvable but `(II)` is non`-` resolvable.
B. Compound `(II)` is resolvable but `(I)` is non`-` resolvable.
C. Both are resolvable.
D. Neither of them is resolvable.

Answer 1

Correct Answer - d
a.
They are not in one plane because `C_(2)` is sp - hybridised and is linear, whereas `C_(1)` and `C_(3)` are s`p_(2)-` hybridised.
So they will show dipole moment.
But
They are in one plane and will not show dipole moment.
Rule `:` Even number of double bonds with two different groups on terminal `C` atoms are resolvable `(O,A.)`, but odd number of double bonds with two different or same groups on terminal `C` atoms are irresolvable `(O.I.A.)`.