Notes-(01)
6. Number of σ bond(s) and π bond(s)
6.4. Sigma (σ) bond and Pi (π) bond | Ethyne
| Sigma(σ) bond | (a): Three σ bonds o One C–C bond: Overlap of sp2 hybrid orbitals on the carbon atom with one sp2 hybrid orbital on the other carbon atom o Two C–H bonds: Overlap between the C atoms’ sp2 orbitals with s orbitals on the hydrogen atoms |
| Pi (π) bond | (b): Each of the two π bonds o Formed by the side-by-side overlap of unhybridized p orbitals on each carbon atom o Two lobes of the π bond are above and below the plane of the σ system o Two lobes of each π bond are positioned across from each other around the line of the C–C σ bond |