What is LANL2DZ?
LANL2DZ (Los Alamos National Laboratory 2 Double-Zeta), which is a widely used ECP type basis set was used to model the metal atoms19. This mixed basis set was created through the use of the GEN keyword in Gaussian 03.
What are diffuse functions?
Diffuse Functions These are very shallow Gaussian basis functions, which more accurately represent the “tail” portion of the atomic orbitals, which are distant from the atomic nuclei. These additional basis functions can be important when considering anions and other large, “soft” molecular systems.
What are polarization functions?
Polarization functions give more room for the electrons to get away from each other to minimize electron-electron repulsion. For H add p functions. λ
What is the LANL2DZ basis set?
LANL2DZ (Los Alamos National Laboratory 2 double-ζ), which is a widely used effective core potential (ECP)-type basis set, was used to model the metal atoms.
What is a basis set in computational chemistry?
A basis set is a set of functions combined linearly to model molecular orbitals. Basis functions can be considered as representing the atomic orbitals of the atoms and are introduced in quantum chemical calculations because the equations defining the molecular orbitals are otherwise very difficult to solve.
What does correlation consistent mean?
The consistency of the relationship is measured by the numerical value of the correlation. A perfect correlation always is identified by a correlation of 1.00 and indicates a perfectly consistent relationship. For a correlation of 1.00 (or –1.00), each change in X is accompanied by a perfectly predictable change in Y.
What is the purpose of basis set?
What does double zeta mean?
Double-zeta basis Sets The function with the large zeta accounts for charge near the nucleus, while the function with the smaller zeta accounts for the charge distribution at larger values of the distance from the nucleus. This expanded basis set is called a double-zeta basis set.
What is the meaning of basis set?
A basis set in theoretical and computational chemistry is a set of functions (called basis functions) that is used to represent the electronic wave function in the Hartree–Fock method or density-functional theory in order to turn the partial differential equations of the model into algebraic equations suitable for …