Question

Why dose type of overlap given in the following figure not result in bond formation ?

Answer 1

Explanation of overlapping of atomic orbitals in figure I

In figure I, positive and negative lobes of $p_x$ orbital overlaps with s-orbital. So net overlap is zero and there will be no bond formation.



Explanation of overlapping of atomic orbitals in figure II

In figure II, $p_x$ and $p_x$ orbitals are perpendicular to each othre, so no overlap is possible in this case. Hence, there will be no bond formation.