19okkkkkkkkkkk...............i wassssss wroooongggg !!!
Q1. What is the difference between non-aromatic and antiaromatic? .. wud u call cyclooctratetraene as non-aromatic or anti-aromatic?
Q2. Why is pyrene aromatic even though it violates Huckel's rule?
Q3. Show the dipole moment of azulene.
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18 Answers
106Q5. Why is cyclopentadiene more acidic than general hydrocarbons?
Q6. Why is cyclooheptatriene less acidic than 1,3,5-heptatriene?
106nopes look up wiki .. ull find that cyclooctatetraene is NON AROMATIC
106Final answers:
(1) non-aromatic
(2) huckel's rule is applicable for monocyclic compounds
(3) .... no answer
(4) i > iii > ii
(5) .. no answer
(6) .. no answer
19huckel's rule is applicable only to MONOCYCLIC compounds.....pyrene has more than 1 ring and hence we cannot apply huckel's rule here !
11) but,organic, for antiaromaticity, a compound needs to be planar.
4) sorry for my misinterpretation.
actually, the 1st one is going through a loss of aromatic character,involving a whole lot of energy and same is d case with the 3rd one,in which its going to gain the aromatic character.so,3rd one is more stable than 1st one; but the 2nd sigma complex is the most stable of the lot. thus the energy levels r arranged in the reverse order of stability.
19(1)cyclooctatraene is non aromatic due to its non planar tub shaped orientation and violation of huckel's rule.
(3) i > iii > ii
106aieee..
Q4. ur ans. is WRONG.... think a bit more
Q2. Pyrene is aromatic .. nothing mentioned about its ion .. pyrene itself is aromatic
1Q.1) the conditions given by eureka r true.thus, cyclooctatraene would be neither aromatic nor antiaromatic as it is not planar( tub shaped )
Q.4) The order would be i) > ii) > iii) (the concept of loss and gain of aromatic character of the ring would come into act)
Q.2) if its so, then it might be due to the aromaticity of the pyrene ion formed, which would follow huckel's rule.
Q.6) might be due to conjugation factor
106Q4. These are the following transition states and intermediates formed in Friedel Crafts Alkylation. Arrange the following in the increasing order of their relative energies.
This one's not a dbt the others are
24i dont know that dude
i told u what i knew [1]
i will read solomon and then reply....but u have to wait for that [1]
106i meant if u consider the reso str. that uve drawn but with the arrows in the reverse sense.. then dipole moment will come opposite...
or am i making a fool of myself? [7]
106but in solomons it is given that cyclooctatetraene is antiaromatic... [2]
24@asish
fir 3rd
there is no such thing that total effect of all structures can be calculated
azzulene is polar and soluble in water just due to its dipole moment [1][1]
241st
The rules for anti-aromaticity are same as aromaticity except instead of 4n +2 pi electrons we want 4n.
1) conjugated
2) planar
3) cyclic
4) 4n π electrons
106kya yahii sirf ek hi resonance structure hai? i mean wont all the reso structures lead to zero dipole moment when combined?
