London-Eyring-Polanyi-Sato equation

DIM/LEPS The method of diatomics-in-molecules (DIM) is based on the definition of states for the atoms in the system (molecule) that are coupled to describe states of diatomic, triatomic, etc., groups. The simplest form of DIM is the LEPS (London-Eyring-Polanyi-Sato) equation. ... 

The London-Eyring-Polanyi-Sato (LEPS) method is a semi-empirical method.8 It is based on the London equation, but the calculated Coulombic and exchange integrals are replaced by experimental data. That is, some experimental input is used in the construction of the potential energy surface. The LEPS approach can, partly, be justified for H + H2 and other reactions involving three atoms, as long as the basic approximations behind the London equation are reasonable. 

For their calculations, Polanyi and co-workers and Karplus, Porter, and Sharma (20) have employed versions of the LEPS (London-Eyring-Polanyi-Sato) potential, which has some connection with formal theory since it is based on the London equation for a system of three atoms [320] ... 

In the London-Eyring-Polanyi-Sato (LEPS) method224 the original London equation is multiplied by an empirical factor which is supposed to account for the effect of overlap. 

The use of known diatomic potentials to estimate the three-atom potential function is at the heart of the so-called London-Eyring-Polanyi(-Sato) (LEP(S)) method. This is a semi-empirical scheme based on the London equation, originally intended to deal with four one-electron S-state atoms. In its most primitive form, we begin by writing the potential between two atoms as a stun of a coulomb (Q)... 

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