title: Structural and vibrational investigation of para-nitraminopyridine N-oxide. A combined experimental and theoretical studies.
abstract: The X-ray and vibrational spectroscopic analysis of para-nitraminopyridine N-oxide are reported. The crystals of investigated compound belong to P2(1) of the monoclinic system, Z=4, a=3.735 A, b=11.767 A, c=14.679 A and beta=93.27 degrees . Room temperature powder infrared and Raman spectra of the title compound and its deuterated analogue were measured. The molecular structure of p-nitraminopyridine N-oxide has been calculated with the aid of density functional (B3LYP) method with the extended 6-311++G(d,p) basis set. The calculated geometrical parameters of investigated molecule in gas phase were compared with experimental X-ray data. The harmonic frequencies, potential energy distribution (PED) and IR intensities of p-nitroaminopyridine N-oxide and its deuterated analogue were calculated with B3LYP method. The assignment of the experimental spectra has been made on the basis of the calculated PED. The time depend Hartree-Fock (TDHF) method was used for calculations of hyperpolarizability beta coefficient.
authors.affiliation: Department of Bioorganic Chemistry, University of Economics, 118/120 Komandorska str., 53-345 Wrocław, Poland.
authors.forename: J
authors.initials: J
authors.lastname: Oszust
authors.forename: J
authors.initials: J
authors.lastname: Baran
authors.forename: A
authors.initials: A
authors.lastname: Pietraszko
authors.forename: M
authors.initials: M
authors.lastname: Drozd
authors.forename: Z
authors.initials: Z
authors.lastname: Talik
mesh_terms: D000631:Aminopyridines / Q000737:chemistry*; D016880:Anisotropy; D003460:Crystallization; D003903:Deuterium / Q000032:analysis; D006860:Hydrogen Bonding; D008956:Models, Chemical; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D013696:Temperature; D014732:Vibration
chemical_list: D000631:Aminopyridines; C508718:para-nitraminopyridine N-oxide; D003903:Deuterium