Which is the incorrect statement regarding resonance contributing structures?

Options

A. All atoms in a contributing structures must have complete valence shells
B. All contributing structures must have same arrangement of atoms
C. All contributing structures must have same number of valence electrons.
D. Equivalent resonance structures have same potential energies

Answer

A

Explanation

There may an atom with incompleat valence shell in one or more contributing structure is e.g.
`{:(overset(+)(C)H_(2)-CH=underset(I)(CH)-O-CH_(3)harrCH_(2)=CH),(overset(+)underset(II)(CH)-O-CH_(3)harrCH_(2)=CH-underset(III)(CH)=overset(+)(O)-CH):}`
Both `I` and `II` have a carbon atom with sexter of electrons while `III` has all its atoms with complete valence shell.