Are all bonds in napthalene equal?

The five bonds are in resonance, but not so much as is observed in benzene> The bond lengths are different with 1–2, 3–4, 5–6, 7–8 being 1.37 A and others 1.42 A. read more

Naphthalene has 5 double bonds in conugation. All C atoms are sp2 hybridised and invove in resonance. But bond lenghts are different due difference in their participation in resonance. C1-C2; C3-C4; C5-C6; C7-C8 are of same length (137 pm) and rest are of same length (141pm). read more

The carbon-carbon bond lengths in naphthalene are not equal because as an aromatic hydrocarbon, naphthalene's structure consists of a fused pair of benzene rings. Hence , it consists of alternating single and double bonds with different bond lengths. read more

"There are two sets of equivalent hydrogen atoms [in naphthalene]: the alpha positions are positions 1, 4, 5, and 8 on the drawing below, and the beta positions are positions 2, 3, 6, and 7. Unlike benzene, the carbon-carbon bonds in naphthalene are not of the same length. read more