The bond axis or internuclear axis is the imaginary straight line that connects the nuclei of atoms bonded to each other in a molecule. You can take any axis as internuclear axis, if z axis is chosen as internuclear axis, no overlapping can take place between s and px, py or pz orbital i.e., there is zero overlap.
What is a internuclear axis?
internuclear axis: The space between the nuclei of two atoms bonded to each other. atomic orbitals: the physical region or space where an electron may be present or found, with a probability calculated from the precise mathematical form of the orbital.
Which combination of orbitals will form a bond if internuclear axis is Z axis?
If the z direction is taken to lie along the internuclear axis of the molecule, then the electrons in the two 2pz orbitals can pair and overlap to form a σ bond.
