Triple Covalent Bonds HELP!?

Question

Are they just polar or do they involve sharing/bonding of electrons. If they do involve the electrons then how many? Or is it that they are just going to produce a triangularly shaped molecule?

Answer 1

triple covalent bonds are non polar.

Answer 2

The nitrogen molecule has a "triple" bond between them. Bonding energies go up as the # of bonds go up.

The MCAS model gives a different explanation. In this model, there is much less repulsion between the bonding electrons and the non-bonding electrons. As more electrons are added to the non-bonding orbitals there is more repulsion and the bond strength go down. Thus, N2 appears with "triple" bond strength, O2 as "double" and F2 as "single" without any actual difference in bonding! Polarity results when atom on either side of the bond are different. When there is a triple bond, four atoms in a row (two on either side of the triple bond) are linear.

Answer 3

In main group elements (C, etc), triple bonds are nonpolar if they involve the same elements, such as in acetylene HCCH (the CC bond).  In a molecule like hydrogen cyanide, HCN, the CN bond will be slightly polar.  All involve 6 electrons.  The shape will be linear around the triple bond since there are only two atoms involved.