What is a Dash structural formula give an example?

What is a Dash structural formula give an example?

Aug 26, 2022, 16:45 IST

Dash structural formula

The Lewis structure can be simplified by representing a shared electron pair by a ‘stick’ (dash, -) between the bonded atoms. When there is one dash between two atoms, the atoms are said to be bonded by a single covalent bond. A double covalent bond, in which two pairs of electrons are shared, is shown by two dashes between the atoms. A triple bond is represented by three dashes between the atoms.

The valence electrons that are not included in covalent bonds are called nonbonding electrons. These are assigned to specific atoms and are represented by dots drawn next to the symbols for these atoms.

Non bonding electrons, like bonding electrons, almost always come in pairs called lone pairs.

Lone pair of electrons on hetero atoms (e.g. oxygen, nitrogen, sulphur, phosphorus, halogens) may or may not be shown. Such structural formulae which focus only on the valence electrons involved in bond formation are called complete structural formulae.

Physics Wallah Chemistry Doubts page consist of more questions for reference. For additional information related to the subject you can check the Chemistry Formula section.

Find below pdf of rules used in Dash structural formula in organic chemistry