Theoreti̇cal investi̇gati̇ons on the molecular geometri̇c structure and vi̇brati̇onal spectral analysi̇s of 4,4´ methylenedi̇ani̇li̇ne

The FT-IR and FT-Raman spectra of 4,4' methylenedianiline molecule was recorded and analyzed. The tautomeric, structural and spectroscopic analysis of the molecule was made by using density functional harmonic calculations. For the molecule, only one tautomeric form was found most stable structure by using B3LYP level with the cc-pVDZ,cc-pVTZ and cc-pVQZ as basis set. Selected experimental bands were assigned and characterized based on the scaled theoretical wave numbers by their total energy distribution (TED). DFT using the MDA molecule electron potential surfaces of the model molecule shapes, sizes, and electrostatic potential values with a three-dimensional map of the surface of the izoelektron molecule density were drawn to the potential (MESP). A molecule to interact with other molecules is an important parameter of quantum chemistry for viewing molecules with the highest occupied molecular orbital (HOMO),molecular orbital (LUMO) of the lowest unoccupied calculations were made.