FSGO Floating Spherical Gaussian

The FSGO (floating-spherical-Gaussian orbital) method in an ab initio computation procedure results in direct bond orbitals without base functions restricted to the atoms. When the degree of bond bending was calculated with this method, the following results were obtained ... 

FSGO (Floating Spherical Gaussian Orbitals) 302 Function 221 Functional 221... 

Frost even derived the method of FSGO - Floating Spherical Gaussian Orbitals, A.A Frost, J. Chem. Phys. 47 (1967) 3707), i.e. Gaussian type oibitals of variationally-ehosen positions. Their number is truly minimal - equal to the number of occupied MOs. 

FSGO floating spherical Gaussian orbital hp horsepower... 

An interesting approach for comparison with XPS experiments is a generalization of the Floating Spherical Gaussian Orbital (FSGO) technique. In this method, each electron pair is represented by a single Gaussian basis function whose exponent and position are obtained by a variational procedure or by reference... 

The last approach dealt with in this section is the Floating Spherical Gaussian Orbital (FSGO) model and related methods. The original FSGO model introduced fay Frost is very simple. It treats chemical bonds in terms of localized orbitals, in a very close correspondence with chemical concepts. Each localized orbital (inner... 

Prof Ali Pakiari The Floating Spherical Gaussian Orbital (FSGO) method... 

The floating spherical Gaussian orbital (FSGO) methodt... 

A Floating Spherical Gaussian Orbital (FSGO) model for polymers calculation of X-ray diffraction structure factors. They have evaluated electron densities and related X-ray structure factors for polyethylene. 

THE FLOATING SPHERICAL GAUSSIAN ORBITAL MODEL (FSGO)... 

Specifically, floating spherical Gaussian orbitals (FSGO), developed from an extension of Frost s simple electron pair model of molecular electronic structure, are used as basis functions in SCF-MO and Cl calculations. As will be described in the following section, these functions, unlike atomic basis orbitals, generally are not confined to atoms, but are allowed to occupy electron-rich regions corresponding... 

To investigate microscopic effects, the basis set used to obtain supermolecule descriptions and point charge models derived therefrom is a set of floating spherical Gaussian orbitals (FSGO), defined [4] as... 

Work by Frost and co-workers in the mid 1960s abandoned the idea of AO-based functions to arrive at an even more compact basis set. They suggested the use of s-type Gaussians that were not fixed at the atomic centers, but could float in space so as to optimally represent each localized pair of electrons. Because only one function was needed for each pair of electrons, the basis sets used in floating spherical Gaussian (FSGO) scheme were often referred to as subminimal. Extensions of Frost s idea to ellipsoidal Gaussians of the form... 

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