Computational and spectroscopic studies of a new Schiff base 3-hydroxy-4-methoxybenzylidene(2-hydroxyphenyl)amine and molecular structure of its corresponding zwitterionic form

Mohammad Hossein Habibi, Elahe Shojaee, Mahnaz Ranjbar, Hamid Reza Memarian, Akihiko Kanayama, Takayoshi Suzuki

    Research output: Contribution to journalArticlepeer-review

    20 Citations (Scopus)

    Abstract

    Computational and spectroscopic properties of a novel Schiff base compound, 3-hydroxy-4-methoxybenzylidene(2-hydroxyphenyl)amine were studied. The crystal structures of the title compound and its corresponding zwitterionic form were analyzed by X-ray diffraction. The presence of NH, CO and CN stretching vibrations in IR spectrum strongly suggest that the title compound has zwitterionic form in the solid state. Molecular geometry of the title compound in the ground state has been calculated using the density functional method (DFT) at B3LYP 6-31++G(d,p) basis set and was compared with the experimental data. The calculated results of the title compound show that the optimized geometry can well reproduce the crystal structure. The molecule shows absorption bands at 345 and 363 nm in EtOH. The shoulder-shaped bands at 415 nm can be assigned to n → π- transitions. The absorption band is observed at 285 nm in EtOH corresponds to the π → π- transitions.

    Original languageEnglish
    Pages (from-to)563-568
    Number of pages6
    JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
    Volume105
    DOIs
    Publication statusPublished - Mar 15 2013

    Keywords

    • DFT study
    • Intramolecular proton transfer
    • Schiff base
    • Zwitterionic

    ASJC Scopus subject areas

    • Analytical Chemistry
    • Atomic and Molecular Physics, and Optics
    • Instrumentation
    • Spectroscopy

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