Fill in the blanks with the correct compound codes. A) Which of these molecules

Question

Fill in the blanks with the correct compound codes.
A) Which of these molecules is aromatic? (hint: 7 aromatic molecules)
B) Which of the non-aromatic molecules is only not aromatic because of steric hindrance? (Hint: 1 molecule)
C) Which of these molecules is anti-aromatic? (Hint: 2 molecules are anti)
D) Which of the non-aromatic molecules would be anti-aromatic if they were planar? (Hint:4 molecules)
E) What is the common name of these bases structures? Compound D: Compound G: Compound Q: Compound R:
O M N HN Fill in the blanks with the correct compound codes or vocabulary words (Remember the computer is very literal so be careful of spelling!)

Explanation / Answer

(A) Aromatic: Aromatic compounds have (4n+2) number of movable electrons in alternate position and they should lie in 1 plane. Hence aromatic compounds are , E, G, J, K, L, Q, R

(B) D contains (4n+2) number of movable electrons(10 electrons) in alternate position. However it is non-aromatic due to steric hindrance. Hance answer is D.

(C) Anti-aromatic: Aromatic compounds have (4n) number of movable electrons in alternate position and they should lie in 1 plane. Hence anti-aromatic compounds are C and P

(D) The following compounds are antiaromatic if they were planar. A, I, O and T

(E) compound D: [10] annulene

Compound G:Tropylium ion

Compound Q: Anthracene

Compound R:Thiophene

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