1.

Which of the following are the resonating structure of CH_(2)=CH-underset(H)underset(|)(C)=O

Answer»

`CH_(2)=CH-underset(H)underset(|)overset(o+)(C)-overset(Θ)(O)`
`CH_(2)=CH-underset(H)underset(|)overset(Θ)(C)-underset(..)overset(o+)(O):`
`overset(o+)(C)H_(2)-CH=underset(H)underset(|)(C)-overset(Θ)(O)`
`overset(delta+)(CH_(2))overset(...)(-)CHoverset(...)(-)underset(H)underset(|)(C)overset(...)(-)overset(delta-)(O)`

Solution :For a STRUCTURE to be a resonating or contributing structure.
(i) Placement of ATOMS should not change.
(ii) Atoms like carbon cannot have more than eight electrons in their valence shell.
(iii) It is better to have NEGATIVE charge on a more electronegativeatom.
(iv) The shared electrons would move only towards more electronegative atom.
In choice (b) POINTS (iii) and (iv) are violated. Hence it is not a resonating structure.
In (a), all the points are followed, so it is a resonating structure.
In (c), all the points are followed, so it is resonating structure.
In (d), all the points are followed, so it is resonating structure.


Discussion

No Comment Found

Related InterviewSolutions