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Nitrosalicylatocopper(II) complexes with chelating pyridine derivatives

Flóra Jozefíková *, Milan Mazúr a, Miroslava Puchoňová, Dušan Valigura b

Department of Inorganic Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovakia
a Department of Physical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovakia
b Department of Chemistry, University of SS Cyril and Methodius in Trnava, J. Herdu 2, 917 01 Trnava, Slovakia

E-mail: * flora.jozefikova@stuba.sk

Abstract: Three new nitrosalicylatocopper(II) complexes have been prepared and characterized. Compounds of the composition Cu(5-NSal)2(2-ampy)2 (1), Cu(5-NSal)2(2-hmpy)2 (2) and Cu(3,5-DNSal)2(2-hmpy)2 (3), where 2-ampy = (2-aminomethyl)pyridine, 2-hmpy = (2-hydroxymethyl)pyridine, 5-NSal = 5-nitrosalicylate anion and 3,5-DNSal = 3,5-dinitrosalicylate anion, were characterized by elemental analyses, EPR and IR spectroscopy. EPR spectra are consistent with the dx2–y2 ground electronic state. Spectral properties have shown “classic” monodentate coordination of 5-nitrosalicylate anion. Similarly, bonding mode of the 3,5-dinitrosalicylate anion in (3) is assumed to be unidentate via the carboxyl group, which is surprising compared with the previously studied complex, where the preferred coordination via the phenolate group anion was observed.

Keywords: nitrosalicylatocopper(II) complexes, (2-aminomethyl)pyridine, (2-hydroxymethyl)pyridine, spectral properties

Full paper in Portable Document Format: acs_0295.pdf

Acta Chimica Slovaca, Vol. 11, No. 1, 2018, pp. 21—25, DOI: 10.2478/acs-2018-0004