In phenoxide ion resonance structures which CO bond length is longest?
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neutral form, as a phenol, the oxygen will still be close to a sp2spX2 shape with the pzpzorbital partially overlapping the pzpz orbital of the carbon bound to it. The proton NMR of phenol clearly shows characteristic aromatic peaks, demonstrating that the ring is aromatic.
Hückel's rule states that a fully conjugated ring will be aromatic if it has 4n+24n+2 electrons, and antiaromatic if it has 4n4n electrons, where nn is an integer ≥0≥0. The rule is a generalization that comes from how the bonding and nonbonding orbitals are filled as electrons are added to an isolated conjugated ring.
In analyzing the resonance of the phenol, the Hückel rule applies only to
Hückel's rule states that a fully conjugated ring will be aromatic if it has 4n+24n+2 electrons, and antiaromatic if it has 4n4n electrons, where nn is an integer ≥0≥0. The rule is a generalization that comes from how the bonding and nonbonding orbitals are filled as electrons are added to an isolated conjugated ring.
In analyzing the resonance of the phenol, the Hückel rule applies only to
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