# Why can we not form a :CH_2 molecule?

Sep 11, 2017

Well methylene, $: C {H}_{2}$ certainly can be formed.....

#### Explanation:

But it is not something that you could store in a bottle or cylinder. Olefins feature a $C = C$ double bond by definition, and the simplest such species is ${H}_{2} C = C {H}_{2}$; this is simply not available for a one carbon chain. And the same applies to acetylene, another TWO CARBON chain, i.e. $H C \equiv C H$, which is supplied as a gas.

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Sep 12, 2017

But the prefix "meth" denotes 1 carbon (e.g. methanol, $C {H}_{3} - O H$, methanoic acid $H - C O O H$) and as there is only 1 carbon, there is no other carbon atom with which to form a double or triple bond.