CD.3 Flashcards
Naming molecules containing benzene rings
What are arenes?
Arenes are aromatic compounds that contain only C and H, they are often referred to as aromatic hydrocarbons.
Typical arenes are derivatives of which aromatic molecule?
Benzene.
A benzene ring in which one of the hydrogen is substitued with another group is known as what group?
Phenyl group.
What is an example of a situation when the phenyl suffix is used rather than the benzene suffix to indicate the presence of a benzene ring?
When the group attached to the benzene ring contains an alkene group.
Aromatic compounds are typically molecules that contain which group?
Benzene.
What property are aromatic compounds generally known to possess?
Special stability that result from the delocalisation of electrons in a conjugated system.
What are the three structural feature to look for when deciding if a conjugated system is aromatic?
- Planar
- Cyclic
- Possess 4n+2 number of delocalised π electrons (i.e.6,10,14)
Can aromatic systems have rings where one or more atom not being carbon?
Yes, nitrogen atoms are typically found in rings of aromatic systems.
What is the relationship between aromatic compounds and arenes?
All arenes are aromatic, not all aromatic compounds are arenes.
Therefore we can say that arene is a subgroup of aromatic compounds.
What is the compound called when a hydrogen on the benzene ring is replaced by a chlorine atom?
Chlorobenzene
What is a nitro group?
-NO2
What is the compound called when a hydrogen on the benzene ring is replaced by a nitro group?
Nitrobenzene
What is the compound called when a hydrogen on the benzene ring is replaced by a carboxyl group, -COOH?
Benzoic acid
What is a sulfonic acid group?
-SO3H, where the sulfur is bonded to an R group, double bonded to two oxygens respectively, and bonded to another OH group.
What is the compound called when a hydrogen on the benzene ring is replaced by a sulfonic acid group?
Benzene sulfonic acid
