SINDO, or actually SINDO1, is one of many semi-empirical quantum chemistry methods

Semi-empirical quantum chemistry methods

Semi-empirical quantum chemistry methods are based on the Hartree-Fock formalism, but make many approximations and obtain some parameters from empirical data. They are very important in computational chemistry for treating large molecules where the full Hartree-Fock method without the...

. It stands for symmetric orthogonalised INDO

INDO

INDO stands for Intermediate Neglect of Differential Overlap. It is a semi-empirical quantum chemistry method that is a development of the complete neglect of differential overlap method introduced by John Pople...

 and was developed by K. Jug and coworkers. Like MINDO

MINDO

MINDO, or Modified Intermediate Neglect of Differential Overlap is a semi-empirical method for the quantum calculation of molecular electronic structure in computational chemistry. It is based on the Intermediate Neglect of Differential Overlap method of John Pople. It was developed by the group...

, it is a development of the INDO

INDO

INDO stands for Intermediate Neglect of Differential Overlap. It is a semi-empirical quantum chemistry method that is a development of the complete neglect of differential overlap method introduced by John Pople...

 method. The main development is the inclusion of d orbitals for atoms of the second row of the periodic table

Periodic table

The periodic table of the chemical elements is a tabular display of the 118 known chemical elements organized by selected properties of their atomic structures. Elements are presented by increasing atomic number, the number of protons in an atom's atomic nucleus...

. It performs better for hypervalent

Hypervalent molecule

A hypervalent molecule is a molecule that contains one or more main group elements formally bearing more than eight electrons in their valence shells...

compounds than other semiempirical methods.