Artículos de revistas
Vibrational studies (FTIR and Raman), conformational analysis, NBO, HOMO–LUMO and reactivity descriptors of S-methyl thiobutanoate, CH3CH2CH2C(O)SCH3
Fecha
2015-10-05Registro en:
Gil, Diego Mauricio; Tuttolomondo, María Eugenia; Ben Altabef, Aída; Vibrational studies (FTIR and Raman), conformational analysis, NBO, HOMO–LUMO and reactivity descriptors of S-methyl thiobutanoate, CH3CH2CH2C(O)SCH3; Pergamon-Elsevier Science Ltd; Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy; 149; 5-10-2015; 408-418
0584-8539
1386-1425
CONICET Digital
CONICET
Autor
Gil, Diego Mauricio
Tuttolomondo, María Eugenia
Ben Altabef, Aída
Resumen
In the present article, the molecular structure of S-methyl thiobutanoate, CH3CH2CH2C(O)SCH3 was determined by ab initio (MP2) and DFT calculations using different basis sets. The infrared and Raman spectra for the liquid phase were also recorded and the bands observed were assigned to the vibrational normal modes. The experimental and calculations confirm the presence of two most stable conformers, one with pseudo anti–syn conformation and another with gauche–syn conformation. The study was completed using natural bond orbital (NBO) and AIM analysis. The molecular properties like dipole moment, molecular electrostatic potential surface (MEP) and HOMO–LUMO molecular orbitals were calculated to get a better insight of the properties of the title molecule. Global and local reactivity descriptors were computed in order to predict reactivity and reactive sites on the molecule for nucleophilic, electrophilic and radical attacks.