Quiz - Benzene and Aromaticity - 2 | Benzene and Aromaticity
Organic Chemistry 2 - Quiz - Benzene and Aromaticity - 2
Which of the following properties of benzene is explained by its delocalized electron system?
Benzene's delocalized electron system contributes to its unusually high stability, a property known as aromatic stability. This is reflected in its resistance to addition reactions that would disrupt its conjugated system.
What is the key criteria for a compound to be considered aromatic?
For a compound to be aromatic, it must be planar, cyclic, and follow Huckel's rule, which states that it contains a certain number of π-electrons (4n+2, with n being a non-negative integer).
Which of the following is true about antiaromatic compounds?
Antiaromatic compounds contain 4n π-electrons within a planar, cyclic molecule, which destabilizes the molecule due to the overlap of p-orbitals.
What distinguishes nonaromatic compounds from aromatic and antiaromatic ones?
Nonaromatic compounds lack a delocalized π-electron system. They do not fulfill the criteria for aromaticity or antiaromaticity and can be either cyclic or acyclic.
Which of the following is not a commonly known example of an aromatic compound?
Hexane is an aliphatic hydrocarbon and is not aromatic. It does not have a conjugated ring system with delocalized electrons.
What is the outcome of reduction of an aromatic compound, such as benzene?
The reduction of an aromatic compound like benzene typically results in the formation of a fully saturated cycloalkane, removing the aromatic system.
The IUPAC name for the compound with a nitro group attached to the carbon adjacent to the methyl group on a toluene molecule is:
According to IUPAC nomenclature rules, the methyl group gets the number 1 position on the ring in toluene, making the nitro group in the adjacent position numbered 2, hence 2-nitrotoluene.
Which of the following is a characteristic property of benzene due to its π-electron system?
Benzene, due to its delocalized π-electron system, exhibits resistance to electrophilic addition reactions, a property that contributes to its chemical stability.
In context with nomenclature, which group takes precedence as the principal functional group in naming benzene derivatives?
According to IUPAC nomenclature, the hydroxyl group (-OH) takes precedence over alkyl groups like methyl (-CH3) and common substituents such as nitro (-NO2) and amino (-NH2) when naming benzene derivatives.