This topic has been hot for many decades since about 1930 and can still be found in (oldfashioned) chemical textbooks and Wikipedia articles today. It is a "Scheinproblem" (a spurious problem) that has been removed by B.F. Gray & H.O. Pritchard, J.Chem.Phys. 25,779(1956): "Electrostatic Interpretation of Directed Valence".
see Tutorial 5