Is Cyclocta-1,3,5,7-tetraene (COT) is aromatic, anti-aromatic OR non- aromatic?

Cyclocta-1,3,5,7-tetraene (COT) have four double bonds  and four single bond alternatively hence their is lack of  resonance. The reason behind this is bigger size of ring and finally  cyclocta-1,3,5'7-tetraene is to be non-planar.
The structure is:

However, the compound have four  double bonds  means eight (8) π electrons.

It may be aromatic, it has to have 4n+2 electrons (2, 6, 10, etc.).

Anti-aromatic systems have 4n electrons (4, 8, 12, etc.).

It may be expected that the molecule was planar and anti-aromatic.

However, actually the molecule takes a tub-shaped (non planer ) conformation in its native state. Since, it is not a planar molecule, it becomes non-aromatic instead of anti-aromatic.

Related Questions:

1. How is base strength related to the availabihty of the electron-pair?
2. Amines are more basic than ammonia why?
3. What is relative basic strength order 1° amines , 2°amines and 3° amines ? Explain:
4. Give an explanation for the fact that Guanidine NH=C(CH3)2 is a stronger base than most of amines?
5. Arrange in correct order of basic Character of aniline, pyrrol, pyridine and piperidine?
6. What is correct basicity order of pyridine, pyridazine, pyrimidine and pyrazine ?
7. Give an explanation for the fact that Guanidine NH=C(CH3)2 is a stronger base than most of amines?
8. Arrange in correct order of basic Character of aniline, pyrrol, pyridine and piperidine?
9. What is correct basicity order of pyridine, pyridazine, pyrimidine and pyrazine ?
10. Why pyridine is more basic than Pyrrole?
11. Why pyrimidine is less basic than pyridine?
12. Imidazole is more basic than pyridine? Why?
13. Biological Important of Imidazole and structure:
14. Pyridine is almost 1 million times less basic than piperidine? Why?
15. Cyclohexylamine amine is the stronger base than Aniline? Why?
16. Tetrahydroquinoline amine is the stronger base than Tetrahydroisoquinoline? Why?
17. Arrange the following in the order of increasing basicity : p-Toluidine, N, N-Dimethyl-p-toluidine, p-Nitroaniline, Aniline. (I.I.T.1986)
18. Arrange the following in the increasing order of their acid strength : Methyl amine, Dimethyl amine, Aniline, N-methyl aniline (I.I.T, 1988).

Resonance energy:

The energy differecnce between most stable resonating structure and resonance hybrid is known as

resonance energy.

 (1) It ís the experimental value which is calculated by heat of hydrogenation (HOH).

(2) Higher the value of resonance energy, greater is the resonance stabilization.

Resonance Energy of Benzene :

The experimental value heat of hydrogenation for benzene is 51 Kcal.

The resonance energy of benzene is calculated fromthe heat of hydrogenation as given below :

Resonance energy comparison:

(1) Consider better resonance or equivalent resonating structures,molecules having equivalent resonating

structures must have more resonance energy, than non-equivalent resonating structures.

(2) Aromatic compound have more resonance energythan non-aromatic compound. 

(3) In case of larger conjugation, more will be the Resonance energy.

(4) Resonance energy will be more, when π-bond, lone pair conjugation is present than π, π-conjugation

Related questions;

(1) What is Steric Inhibition in Resonance of SIR effect ?

(2) What is the Inversion of Amines ?

(4) Which is more stable? CH3-CH2+ (Ethyl carbocation) or CH2=CH+ (Vinyl carbocation)? And why?

(5) Why The phenoxide ion is more stable than phenol ?

(6) What happens if two deactivating and one activating group is present on a benzene ring?

(7) Among orthochlorophenol and orthofluorophenol, which will be a stronger acid and why?

(8) Why benzyl carbonium ion is more stable than ethyl carbonium ion?

(9) Explain why aniline is less basic than ammonia?

(10) 4- nitrophenol is more acidic than 3,5 - dimethyl –4-nitro-phenol. Explain.

(11) What are the difference between Tautomerism & Resonance ?

(12) Though enol form is less stable than keto form, phenol exists in enol form, why?

(13) What is the nucleophilicity of halides?

(14) What is correct acidic strengths order of the haloforms acids ? Give correct explanation.

(15) Why are bridge head carbocations unstable?

(16) Why is cyclopropyl methyl carbocation exceptionally stable?

(17) Azabicyclo[2,2,1]heptane is more basic thantriethylamine why?.

(18) Which carbocation is more stable : Benzyl or Tertiary?

(18) Which is more stable ,vinyl carbocation or allyl carbocation?

(19) Which carbocation is more stable : Benzyl or Tertiary?

(20) Although both in benzylic carbanion and cyclopentadienyl anion 6 electrons are spread, but benzylic carbanion is more stable. Why?

Write all the the chain and positional isomers of Heptane and also write their IUPAC name.

Realated Questions:

(1) How many cyclic isomers possible of (C6H12) Hexene?

(2) How many cyclic isomers possible of (C5H10) pentene?

(3) Write the major and minor product of hydration of 1-Methylcyclopent-1-ene in acidic medium?

(4) Why enol form of Beta Dicarbonyl compound more stable than those of monocarbonyl compounds?

(5) Why enol form of phenol is more stable than its keto isomers?

(6) What is Imine-Enamine tautomerism?

(7) The term Asymmetric center and chiral center :

(8) Number of structural isomers monoclorinated alkane and number of carbon atoms present.

(9) Write the total Isomers of 1,1-Dicloro propene (C3H4Cl2)?.

(10) How determination of chirality in Meso compounds ?

(11) The term stereogenic center or stereocenter: