# What is the name of a covalent bond produced by the sharing of three pairs ofvelectrons?

A $\text{triple bond}$?
$\text{Alkynes}$, $R C \equiv C R '$, $\text{dinitrogen}$, $N \equiv N$, and $\text{carbon monoxide}$, ""^(-)C-=O^+, all provide examples of such a triple covalent bonds. Shorter internuclear separations can be achieved with multiple bonds, and the $C - C$ distance in acetylene is approx. $1.20 \times {10}^{- 10} \cdot m$, versus $1.35 \times {10}^{- 10} \cdot m$ in ethylene, versus $1.54 \times {10}^{-} 10 \cdot m$ in ethane. (I put some numbers in because as a chemist, as a physical scientist, you should always use data to inform your argument.)
The multiple bonds are conceived to lie outside the $C - C$ vector, but nevertheless allow closer approach of the participating nuclei and a stronger bond.