Integral approximations for molecular orbital theory

An Extended Hückel Theory. I. Hydrocarbons

Roald Hoffmann · The Journal of Chemical Physics · 1963 · 4.6K citations

Natural Sciences, Chemistry, Computational Chemistry +16

Electron interaction in unsaturated hydrocarbons

J. A. Pople · Transactions of the Faraday Society · 1953 · 2.1K citations

Natural Sciences, Chemistry, Physics +10

A Semi-Empirical Theory of the Electronic Spectra and Electronic Structure of Complex Unsaturated Molecules. I.

Rudolph Pariser, Robert G. Parr · The Journal of Chemical Physics · 1953 · 2K citations

Natural Sciences, Chemistry, Physics +17

On the Pi-Electron Approximation and Its Possible Refinement

Peter Lykos, Robert G. Parr · The Journal of Chemical Physics · 1956 · 219 citations · Full text

Natural Sciences, Chemistry, Physics +16

Approximate Formulas for Many-Center Integrals in the Theory of Molecules and Crystals

Per‐Olov Löwdin · The Journal of Chemical Physics · 1953 · 193 citations

Natural Sciences, Chemistry, Quantum Chemistry +2