ELECTRONIC CHARACTERISTICS OF THIOPHENES
The distribution of the electron density of thiophene, two dimers with different positions of sulfur atoms in the rings, and a trimer by the B3LYP method was obtained. The charges, relative energy, and volumes of groups are compared using the "quantum theory of atoms in molecules" (QTAIM). The change in the integral electronic characteristics of carbon and the methine group, which depends on the position and distance between sulfur atoms in thiophene rings, is considered.