Ch. 17 - AromaticityWorksheetSee all chapters
All Chapters
Ch. 1 - A Review of General Chemistry
Ch. 2 - Molecular Representations
Ch. 3 - Acids and Bases
Ch. 4 - Alkanes and Cycloalkanes
Ch. 5 - Chirality
Ch. 6 - Thermodynamics and Kinetics
Ch. 7 - Substitution Reactions
Ch. 8 - Elimination Reactions
Ch. 9 - Alkenes and Alkynes
Ch. 10 - Addition Reactions
Ch. 11 - Radical Reactions
Ch. 12 - Alcohols, Ethers, Epoxides and Thiols
Ch. 13 - Alcohols and Carbonyl Compounds
Ch. 14 - Synthetic Techniques
Ch. 15 - Analytical Techniques: IR, NMR, Mass Spect
Ch. 16 - Conjugated Systems
Ch. 17 - Aromaticity
Ch. 18 - Reactions of Aromatics: EAS and Beyond
Ch. 19 - Aldehydes and Ketones: Nucleophilic Addition
Ch. 20 - Carboxylic Acid Derivatives: NAS
Ch. 21 - Enolate Chemistry: Reactions at the Alpha-Carbon
Ch. 22 - Condensation Chemistry
Ch. 23 - Amines
Ch. 24 - Carbohydrates
Ch. 25 - Phenols
Ch. 26 - Amino Acids, Peptides, and Proteins

Concept #1: Heteroatoms

Example #1: Determine heterocycle aromaticity

Example #2: Determine heterocycle aromaticity

Example #3: Determine heterocycle aromaticity

Example #4: Determine heterocycle aromaticity

Example #5: Determine heterocycle aromaticity

Example #6: Determine heterocycle aromaticity

Example #7: Determine heterocycle aromaticity

Example #8: Determine heterocycle aromaticity

Example #9: Determine heterocycle aromaticity

Additional Problems
Indicate which of the following molecules are aromatic, non-aromatic or anti-aromatic. (Assume all the molecules are planar).
Which one(s) of the following compound is/are aromatic?
Which of these structures have eight π electrons? (A) I only (B) II only (C) III only (D) I, II, III  
Which stucture is not aromatic?
Classify each of the following molecules and ions as aromatic, antiaromatic or nonaromatic.
Circle the structure below with the highest number of lone pair electrons that are  not  needed to satisfy Huckel's rule of aromaticity. 
Which of the following compounds are  anti-aromatic? 1) B and D 2) A and C 3) A only 4) C and E 5) None of them are anti-aromatic
How many π electrons are in the following compound? 1) 4 2) 6 3) 8 4) 10 5) 12
Classify each of the following molecules and ions as aromatic and nonaromatic. 
The indicated lone pair in the following compound is (circle one per atom)?
Identify each of the following compounds as aromatic, non-aromatic or anti-aromatic.
Which two criteria of Huckel’s Rule as stated in 1931 would we need to modify in order to account for the aromaticity of a purine molecule? What modifications are necessary?
Assuming planarity, which of the following molecules is aromatic?
Which of the following are aromatic? a. I, II, III, IV and V b. I, II and IV only c. I, III and V only d. I, II and III only e. I, II, III and IV
Select the correct name for the following compound.a. imidazoleb. pyrrolec. furand. pyrene