FTP, name this theory commonly applied to molecules with a discernible central atom that attributes the spatial orientation of non-bonding electrons to electrostatic repulsion between those valence electrons.
Though double and triple bonds only occupy one coordination vertex, it assumes that a double bond is always an interaction between a sigma and pi bond and that a triple bond is always an interaction between a sigma bond and two pi bonds. Ultimately, everything depends on the number of electrons in the sigma orbitals. Inspired by Gilbert Lewis, it directly stems from work done by H.M. Powell and Nevil Sidgwick in the 1940s plus British chemist Ronald Nyholm and Canadian R.J. Gillespie, who coined the term in the 1960's. FTP, name this theory commonly applied to molecules with a discernible central atom that attributes the spatial orientation of non-bonding electrons to electrostatic repulsion between those valence electrons.
Though double and triple bonds only occupy one coordination vertex, it assumes that a double bond is always an interaction between a sigma and pi bond and that a triple bond is always an interaction between a sigma bond and two pi bonds.
{VSEPR} theory (“Valence Shell-Electron Repulsion”)