title: DFT simulations and vibrational spectra of 2-amino-2-methyl-1,3-propanediol.
abstract: The FTIR and FT-Raman spectra of 2-amino-2-methyl-1,3-propanediol were recorded in the regions 4000-400cm(-1) and 4000-50cm(-1) respectively. The structural and spectroscopic data of the molecule in the ground state were calculated using Hartee-Fock and density functional method (B3LYP) with the augmented-correlation consistent-polarized valence double zeta (aug-cc-pVDZ) basis set. The most stable conformer was optimized and the structural and vibrational parameters were determined based on this. The complete assignments were performed on the basis of the Potential Energy Distribution (PED) of the vibrational modes, calculated using Vibrational Energy Distribution Analysis (VEDA) 4 program. With the observed FTIR and FT-Raman data, a complete vibrational assignment and analysis of the fundamental modes of the compound were carried out. Thermodynamic properties and Mulliken charges were calculated using both Hartee-Fock and density functional method using the aug-cc-pVDZ basis set and compared. The calculated HOMO-LUMO energy gap revealed that charge transfer occurs within the molecule. (1)H and (13)C NMR chemical shifts of the molecule were calculated using Gauge-Independent Atomic Orbital (GIAO) method and were compared with experimental results.
authors.affiliation: Department of Physics, Women's Christian College, College Road, Chennai 600006, TN, India. Electronic address: devi_renuga@yahoo.com.
authors.forename: T S
authors.initials: TS
authors.lastname: Renuga Devi
authors.affiliation: P.G. Department of Physics, Women's Christian College, College Road, Chennai 600006, TN, India; Department of Physics, Periyar University, Salem 636011, TN, India.
authors.forename: J
authors.initials: J
authors.lastname: Sharmi kumar
authors.affiliation: Department of Physics, C. Kandaswami Naidu College for Men in Anna Nagar East, Chennai 600102, TN, India.
authors.forename: G R
authors.initials: GR
authors.lastname: Ramkumaar
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D011409:Propylene Glycols / Q000032:analysis*; D011789:Quantum Theory; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman
chemical_list: D011409:Propylene Glycols; C019250:2-amino-2-methyl-1,3-propandiol
keywords: AMPD; FT-Raman; FTIR; Hyperpolarizability; NMR