Aromatic Compounds
No description yet. This curated deck is ready for daily study.
Card preview (23)
Aliphatic compounds
Organic compounds that are not aromatic (can be straight-chain, branched, or cyclic).
Cyclic compounds
Compounds where atoms are connected in a ring shape.
Aromatic compounds
Cyclic, planar compounds with delocalized π electrons that follow the 4n + 2 π electron rule (Hückel’s rule), where n is an integer.
Anti-aromatic compounds
Cyclic, planar compounds with 4n π electrons (where n is an integer) — highly unstable due to electron repulsion.
Non-aromatic compounds
All compounds that break any or every rule for it to be considered as an aromatic or anti-aromatic compound.
Requirements for aromaticity
✓ Must be cyclic ✓ Must be planar (no sp3 . Tetrahedral) ✓ Must be fully conjugated (alternating single and double bonds) ✓ Must follow the 4n + 2 π electron rule
Requirements for anti-aromaticity
✓ Must be cyclic ✓ Must be planar ✓ Must be fully conjugated ✓ Must follow the 4n π electron rule
Is cyclohexane aromatic?
No. Cyclohexane is non-aromatic because it is not planar and conjugated.
What is a non-aromatic compound?
• A non-aromatic compound is any cyclic compound that: • Does not meet aromaticity conditions (planarity, conjugation, and 4n+2 π electrons), • And is not anti-aromatic (which fails the 4n+2 rule but meets the others).
Alicyclic compounds
Cyclic aliphatic compounds
Are aromatic compounds stable?
Yes
How many pi electrons are there in each pi bond?
Two
Are anti-aromatic compounds stable?
No
Do aromatic compounds have delocalized electrons?
Yes
What is resonance?
An average between the different structures we can draw
Common name for methyl benzene
Toluene
Benzene with a alcohol group name
Phenol
Benzene ring with a carboxylic acid group name
Benzoic acid
OMP
Ortho Meta Para
What is the name of the benzene functional group attached to other organic compounds?
Phenyl
What is an Aryl group?
Any functional group derived from an aromatic ring
Naphthalene
Biphenyl