Cyclopropenylidene is generally destroyed by reactions between ions and neutral molecules.

As the electrons move through the medium, they collide with the neutral molecules or atoms.

An important example is impact ionization, where an electron ionizes a neutral molecule.

Salts are always better at dissolving in water than big neutral molecules.

This flow is the dominant force, allowing movement of neutral molecules, including glucose, across the skin.

This effect is particularly pronounced for charged species, which have even lower permeability coefficients than neutral polar molecules.

This effect arises because more energy is required to deprotonate anions than neutral molecules.

Common neutral molecule leaving groups are water (HO), and ammonia.

It is a neutral four-carbon molecule containing four pi bonds.

The neutral molecule can be formed in a low pressure gas discharge tube.