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Coordination compounds of some 3d metals with 3-methyl-1-phenyl-4-formylpyrazol-5-one |
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| Authors: | V F Shulgin N S Pevzner O V Konnik O I Konshina G G Aleksandrov I L Eremenko A S Bogomyakov |
| Institution: | 1. Taurida National V.I. Vernadsky University, pr. Vernagskogo 4, Simferopol, Crimea, 95007, Ukraine 2. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991, Russia 3. International Tomography Center, Siberian Branch, Russian Academy of Sciences, Institutskaya ul. 3a, Novosibirsk, 630090, Russia |
| Abstract: | CuL2 · 1.5H2O and ML2 · 2H2O · 2EtOH (M = Co2+, Ni2+, Mn2+) coordination compounds were synthesized via the exchange reaction between the sodium salt of 3-methyl-1-phenyl-4-formylpyrazol-5-one (HL) and metal chlorides.The synthesized compounds were studied by thermogravimetry, magnetochemistry, and electron and IR spectroscopy. The complexes CuL2 · 2Py and CoL2 · 2Py · MeOH were obtained via recrystallization from a methanol-pyridine mixture, and their structures were studied by X-ray diffraction. Pyrazolone was found to be coordinated in the deprotonated enol form and to form six-membered chelate rings with a metal. The coordination polyhedron of a metal cation was found to be a square bipyramid (Cu2+) or an axially elongated octahedron (Co2+) with its vertices occupied by the oxygen atoms of 3-methyl-1-phenyl-4-formylpyrazol-5-one and the nitrogen atoms of pyridine. |
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