Why can we not form a #:CH_2# molecule?
But it is not something that you could store in a bottle or cylinder. Olefins feature a
Are you happy with this?
Because there is no other carbon atom with which to bond!
The "ene" and "yne" suffixes denote olefins and acetylenes (or alkenes or alkynes). These compounds contain at least one carbon to carbon double bond, or at least one carbon to carbon triple bond, respectively.
But the prefix "meth" denotes 1 carbon (e.g. methanol,
So you cannot form a methene nor a methyne.