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What does ‘aromatic’ mean?

In A Level Chemistry, the word aromatic means a molecule’s structure contains at least one cyclic ring which has a delocalised pi electron cloud above and below it. This occurs from unbonded P orbital electr...
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Answered by Sam L. • Chemistry tutor
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Explain what is meant by optical isomerism.

Stereoisomers are molecules that have the same structural formula, but a different arrangement of the atoms in space.Optical isomers are a type of stereoisomers where the two molecules have non-superimposabl...
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Answered by Emily W. • Chemistry tutor
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What does the percentage atom economy mean

It is the atomic mass of the desired product divided by the total atomic mass of all the products in the reaction, multiplied by 100
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Answered by Tobias E. • Chemistry tutor
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Explain the delocalised model of benzene, and hence why it is less reactive with electrophiles than cyclohexene

Benzene consists of a ring of 6 carbon atoms bonded to each other by sigma bonds from the overlap of s orbitals.p orbitals above and below the ring overlap to form a delocalised pi system with rings of elect...
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Answered by Archie W. • Chemistry tutor
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Explain the difference between homolytic fission and heterolytic fission.

Homolytic fission: Homolytic fission occurs when the covalent bond breaks evenly , and each of the bonded atoms takes one of the shared pair of electrons from the bond. Each atom now has a single unpaired el...
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Answered by Hannah W. • Chemistry tutor
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