Definition

Noun: - The chemical group -NO₃: A nitro group is a functional group in organic chemistry consisting of one nitrogen atom bonded to two oxygen atoms, with the nitrogen also typically bonded to a carbon atom in an organic compound. Its formula is represented as -NO₂ (though the reference shows -NO₃, the standard is -NO₂).

Usage

The term "nitro group" is used specifically in chemistry to describe this distinct molecular structure and its properties. - The presence of a nitro group often makes a compound explosive. - Chemists study how a nitro group affects the reactivity of an aromatic ring.

Advanced Usage

• As a substituent: The nitro group is discussed as a substituent that withdraws electron density from a molecule.
  • The nitro group is a strong electron-withdrawing group, deactivating the benzene ring towards electrophilic substitution.

Variants and Related Words

• Nitro compound (n): An organic compound that contains one or more nitro groups.
  • Nitromethane is a simple nitro compound used as a fuel additive.
• Nitration (n): The chemical process of introducing a nitro group into a molecule.
  • The nitration of benzene requires a mixture of nitric and sulfuric acids.

Synonyms

• -NO₂ group: A direct synonym referencing the chemical formula.
• Nitro functional group: A more descriptive synonym.

Related Phrases/Idioms

Not commonly used in idiomatic expressions, as it is a technical scientific term.

Noun

1. the group -NO3