title: Pseudosymmetry analysis of molecular orbitals.
abstract: We introduce a pseudosymmetry analysis of molecular orbitals by means of the newly proposed irreducible representation measures. To do that we define first what we consider as molecular pseudosymmetry and the relationships of this concept with those of approximate symmetry and quasisymmetry. We develop a general algorithm to quantify the pseudosymmetry content of a given object within the framework of the finite group algebra. The obtained mathematical expressions are able to decompose molecular orbitals by means of the irreducible representations of any reference symmetry point group. The implementation and usefulness of the pseudosymmetry analysis of molecular orbitals is demonstrated in the study of σ and π orbitals in planar and nonplanar polycyclic aromatic hydrocarbons and the t2 g and eg character of the d-orbitals in the [FeH6](3-) anion in its high spin state along the Bailar twist pathway.
authors: Departament de Química Física, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain. davidcasanovacasas@ub.edu
authors: David
authors: D
authors: Casanova
authors: Pere
authors: P
authors: Alemany
authors: Andrés
authors: A
authors: Falceto
authors: Abel
authors: A
authors: Carreras
authors: Santiago
authors: S
authors: Alvarez
mesh_terms: D000465:Algorithms; D011789:Quantum Theory