Question

why there are no structures of methene and methyne?

Answer 1

Reason for no structures of methene and methyne:

• Methene and methyne cannot exist. The bond of ene and yne cannot be formed.
• The "ene" bond is double and "yne" bond is triple. The bond of ene and eyn requires enough carbon atoms.
• There is only one carbon atoms and cannot form the multiple bonding. The multiple bonding is not possible. There exist the structure of methane.
• Hence the double and triple bond is not possible and hence no ethyne and methane is possible.

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Why does methene and methyne does not exists.

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Answer 2

No structures for methene and methyne:

• There is no existence of methene and methyne.
• Methene is from the family alkene and methyne is from the family alkyne.

Methene:

• The general formula of alkene is CₓH₂ₓ
• The value of x is natural number.
• If we substitute number '1' in general formula, we get C₁H₂ in which the number of atoms attached with carbon is two.
• But, we all know that carbon has tetravalent nature. Thus, it need four atoms attached to it.
• Since, methene violates the tetravalent nature of carbon, methene can never possibly exists.

Methyne:

• The general formula of alkyne is CₓH₂ₓ₋₂
• The value of x is natural number.
• If we substitute number '1' in general formula, we get C₁H₀ in which the number of atoms attached with carbon is one.
• But, we all know that carbon has tetravalent nature. Thus, it need four atoms attached to it.
• Since, methyne violates the tetravalent nature of carbon, methyne can never possibly exists.