Počet záznamů: 1  

Dihydroxycoumarin Schiff base synthesis and structure determination from powder diffraction data

  1. 1. 0398855 - FZU-D 2014 RIV NL eng J - Článek v odborném periodiku
    Rohlíček, Jan - Ketata, I. - Ben Ayed, T. - Ben Hassen, R.
    Dihydroxycoumarin Schiff base synthesis and structure determination from powder diffraction data.
    Journal of Molecular Structure. Roč. 1051, NOV (2013), s. 280-284 ISSN 0022-2860
    Grant ostatní:AV ČR(CZ) AP0701
    Program:Akademická prémie - Praemium Academiae
    Institucionální podpora: RVO:68378271
    Klíčová slova: powder diffraction * structure solution * Schiff base * dihydroxycoumarine
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 1.599, rok: 2013

    The titled compound with systematic name 4-hydroxy-3-((E)-1-(2-((E)-1-(4-hydroxy-2-oxo-2H-chromen-3-yl)ethylideneamino)ethylimino) ethyl)-2H-chromene-2-one is a new tetradentate (ONNO) Schiff-base which was synthesized by condensation of ethylenediamine and 3-acethyl 4-hydroxycoumarin. Its crystal structure was ab initio determined from laboratory X-ray powder diffraction data by using the direct space approach. The structure is monoclinic with space group P21/n and unit cell parameters a = 10.4153(4) Å, b = 12.8319(4) Å, c = 7.48229(15) Å, b = 98.892(3) Å, V = 987.97(5) Å3. The symmetric part of the structure contains one half of the centrosymmetric molecule. The obtained product was also characterized by infrared, UV–VIS and 1H NMR spectroscopy.
    Trvalý link: http://hdl.handle.net/11104/0226205