N,Nc-DIPYRIDOXYL(1,2-DIAMINOCYCLOHEXANE) AND ITS Cu(II) COMPLEX: SYNTHESIS, EXPERIMENTAL AND THEORETICAL STUDIES

dipyridoxyl Schiff base copper IR assignment NMR DFT.

ТЕПЛОЕМКОСТЬ, ЭЛЕКТРОПРОВОДНОСТЬ И СТРУКТУРНЫЕ ИЗМЕНЕНИЯ МИКРОЭМУЛЬСИЙ ВОДА—ДОДЕЦИЛСУЛЬФАТ НАТРИЯ—ТРИЭТАНОЛАМИН— 1-ПЕНТАНОЛ—1,1,2,2-ТЕТРАФТОРДИБРОМЭТАН, ИЗУЧЕНИЕ ВЛИЯНИЯ ИОННОГО ОБМЕНА НА СОРБЦИОННЫЕ СВОЙСТВА ЦЕОЛИТА РОДА ГЕЙЛАНДИТА—КЛИНОПТИЛОЛИТА, ...

2015. 56, 2 - – - UDC 541.6:547.13:546.56 N,N-DIPYRIDOXYL(1,2-DIAMINOCYCLOHEXANE) AND ITS Cu(II) COMPLEX: SYNTHESIS, EXPERIMENTAL AND THEORETICAL STUDIES S.A. Beyramabadi, A. Morsali, A. Shams Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran E-mail: beiramabadi6285@mshdiau.ac.ir; beiramabadi@yahoo.com (Beyramabadi) Received June, 27, 2013 Revised — September, 17, 2013 In this work, the N,N-dipyridoxyl(1,2-diaminocyclohexane) [=H2L] Schiff-base ligand and its square complex [Cu(L)] are newly synthesized and characterized by IR, mass spectroscopy, 1H NMR, and elemental analysis. <...> The ful optimization of geometries, the 1H NMR chemical shifts (for the H2L) and their vibrational frequencies are calculated using the density functional theory (DFT) method. <...> The optimized geometry of the ligand is not planar, but each of two pyridine rings and the cyclohexane moiety are in the separate planes. <...> The tetradentate-dianionic L2– ligand occupies the four coordination positions of the square comlex in the N, N, O–, O– manner. <...> INTRODUCTION Due to a variety of applications, including the analytical [ 1 ] and industrial use as catalysts [ 2, 3 ], the Schiff-base ligands and their complexes are of great importance. <...> Manganese dipyridoxyl diphosphate is a contrast agent for the magnetic resonance imaging of the liver [ 8 ] and a copper(II) complex of pyridoxal is used in the treatment of diabetic complications [ 9 ]. <...> Coordination of Schiff-base ligands to metal ions improves their biological activities [ 10 ]. <...> In continuation of our studies [15—19 ] and hopping to biological and catalytic applications, we report here the synthesis and spectroscopic characterization of the H2L Schiff-base of pyridoxal and its Cu(II) complex, where H2L is N,N-dipyridoxyl(1,2-diaminocyclohexane). <...> The determined structural parameters of the ligand and its Cu(II) complex, and the assignment of the IR bands and 1H NMR chemical shifts can be used as databases for the identification of similar compounds. . 259 – 265 Beyramabadi S.A., Morsali A., Shams A., 2015 260 S.A. BEYRAMABADI, A. MORSALI, A. SHAMS EXPERIMENTAL Material and methods. <...> Then, the gas phase optimized geometries were used to compute theoretical vibrational frequencies of the H2L ligand and its <...>

• Похожие документы из РУАЭСТ
• |
• Похожие документы из Руконт