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

Solution: Indicate whether the statement is true or false.   A. Heterocycles can “choose” to remain unconjugated if donating a lone pair into the ring will mean the ring has 4n π-electrons.  B. Fully conjuga

Problem

Indicate whether the statement is true or false.

 

A. Heterocycles can “choose” to remain unconjugated if donating a lone pair into the ring will mean the ring has 4n π-electrons. 

B. Fully conjugated rings are always more stable than incompletely conjugated rings. 

C. If a molecule absorbs a certain wavelength of light, it will appear to be that color to an observer.

D. In arrow-pushing mechanisms, the arrows should be drawn originating from the electrophile and terminating at the nucleophile. 

E. A cyclic compound that has full conjugation interrupted by one sp3-hybridized carbon will become more acidic if an extra lone pair will result in 4n+2 π-electrons.

F. If a molecule releases light, an electron is excited from a bonding orbital to a nonbonding orbital. 

G. When two atoms bond, they store energy; when a bond breaks, it releases energy.

H. Friedel-Crafts alkylation can be used to add an alkyl group to the para position of aniline. 

I. Halides are electron-donating groups and o,p directors. This makes them mild activators toward EAS.

J. Benzene is nucleophilic enough for a haloacid to react with it without a catalyst. 

K. Diels-Alder reactions can also occur with electron-donating groups on the dienophile and electron-withdrawing groups on the diene.