Aromaticity

@sky/star bt why c antiaromatic

C : azulene

i searched up the real structure of azulene ,and found this

which means fiitjee messed up with the structure of azulene,sorry guys for the confusion

and in d it loses planarity as stated above...........[2][2]

i was thinking a to be 8 annulene my mistake sry

yea.. D is non-aromatic.. annulene-10 is not aromatic.. exception 2 huckle's rule..

i have read dis.. this is because the trans -annular hydrogens(d 1s shown separately in d figure) stearically interfere wid each oder n push d molecule out of planar..
since its not planar, resonance of pi electrons(evn tho its 4n+2) is nt possible..

half of d molecule is above n half of it is below d plane..
this is called stearic inhibition of resonance..

** annulene-14 is aromatic despite not satisfying huckle's rule..

good.. about annulene 10...:)

but annulene 14 me 14 pi electrons hote hai naa..it follows huckel rule for n=3 (4.3+2)

yea.. thnx 4 dat update.. bt acc to wat i've read annulene-14 has 16 pi electrons.. u can check it up to confirm tho.. do lemme knoe if there's sm update ..

c par kis baat ka bawal hai usme to conjugation hi nai hai so c bhi non aromatic hona chaiye
although structure given is wrong bt we hav to ans acc to the given data i suppose??

10 ANNULENE SUFFERS STEARIC HINDERANCE DUE TO THE HYDROGEN ATOMS AND HENCE BECOMES NON PLANAR AND HENCE IS NON AROMATIC!!!!!!!!!

A is a COT structure and hence this is non planar and hence is non aromatic!
this is having a boat like structure!!!!

C is non conjugated hence that cannot be the aromatic species that is why i said undoubtedly B is the answer!!!!!!!!!!

cheers!!!!!!!

d is non aromatic as non planar i think

this is a single option question (only d is correct acc to the key)

d not sure

but c to nonaromatic hai

yeh C hona chaiye.. !!