Which of the following compounds is not aromatic?

Hi can someone help me with these Organic Chemistry questions? I’m so lost with orgo 2

12. Which of the following compounds is not aromatic? A. B. A. A B. B C. C D. D 13. Which of the following compounds is not aromatic? A. B. A. A B. B C. C D. D 14. Which of the following compounds is aromatic? A. C. D. A. A B. B C. C D. D
Hi can someone help me with these Organic Chemistr
Hi can someone help me with these Organic Chemistr
Hi can someone help me with these Organic Chemistr
Hi can someone help me with these Organic Chemistr
Hi can someone help me with these Organic Chemistr
Hi can someone help me with these Organic Chemistr

Answer

12. Option B. (B) is the answer. Here, the structure has only 4pi electrons and not aromatic according to Huckel,s rule 4n+2pi electrons. 13. Option A. (A): Here, the structure has 6pi electrons in the ring but not delocalized. 14. Option D. (D): Only this structure satisfies Huckel,s rule 4n+2pi electrons. 11. A. Yes: The pyrylium cation is a conjugated 6-membered carbon ring system with one carbon atom replaced by a positively charged oxygen atom. It is, like benzene, an aromatic compound. 15. Option B. (B):Only this structure satisfies Huckel,s rule 4n+2pi electrons. 16. option D: the pi electron system is not continuous 17. A: it has 4n elctrons 18. B: its not planar 19. B: SP2 20. B: Meta-dichloro toluene 21. D: 2-chlorophenol 22. D: D 23. A. A: Conjugated alkenes have lower heat of hydrogenation because of its more stablility. 24. D and E: O,m-dibromonitrobenzene 25. Option E: is not aromatic 1. Option D: SP3 and SP2

2. Option B: SP2

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