What is a non - metallic compound?

Answer 1

nonaromatic rings

A ring that does not have a loop of pi electrons but is not antiaromatic is said to be nonaromatic. A compound whose molecule contains one of more nonaromatic rings is called a nonaromatic compound. A ring whose pi system contains a 4n number of electrons but avoids being antiaromatic by deviating from planarity is nonaromatic.

eg:

Experimentally, 3 exists in the following nonplanar conformation, known as the tub conformation, in which no two adjacent double bonds are on the same plane. Thus, there is no loop of pi electrons in the ring in 3; 3 is nonaromatic.

A ring whose pi system contains 4n + 2 number of electrons but is forced to deviate from planarity is nonaromatic. Thus, 10is nonaromatic.

To find whether a ring is aromatic, antiaromatic, nonaromatic, or none of the above, use the following flow chart.

Answer 2

Aromatic compounds contain a conjugated ring system such as benzene, naphthalene, anthracene, pyrimidine, imidazole, etc. Non-aromatic compounds do not (and generally the term "aliphatic" is used instead of "non-aromatic").

Answer 3

All of the gases in the atmosphere (including oxygen, nitrogen...) are non metallic compounds.