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Sintetizirala in opisala sem eno modro-zeleno 1 in eno vijolično bakrovo(II) spojino 2 ter eno rožnato kobaltovo(II) koordinacijsko spojino 3 s fenoksiocetno kislino (= HL = C8H8O3). Sintezni postopek sem izvedla tako, da sem izhodnim spojinam bakra(II) in kobalta(II) dodajala nevtralno fenoksiocetno kislino, katero sem raztapljala v metanolu ali vodi. Uporabila sem tudi dodatni piridinski nevtralni ligand nikotinamid. Po sintezi sem izolirane spojine analizirala z različnimi metodami, in sicer: rentgensko praškovno difrakcijo, elementno analizo, IR spektroskopijo ter z UV-Vis spektroskopijo. Ugotovila sem, da se praškovna difraktograma spojin 1 in 3 ujemata z izračunanima difraktogramoma spojin [Cu(L)(L)]6 oziroma [Co(L)2(H2O)2]n z že določenima strukturama. Za spojino 2 takšnega ujemanja nisem našla. Glede na elementno analizo za 2 sklepam na formulo Cu(L)2(nia)2 (nia = nikotinamid = C6H6N2O). Prisotnost karboksilatnih nihanj v območju 1600 in 1400 cm-1 je v IR spektrih vseh treh spojin. Trakovom nad 3000 cm 1 v IR spektru spojine 2 pripisujem prisotnosti nikotinamida. Barva izoliranih spojin se sklada z absorbcijo rdeče svetlobe Cu(II) spojin in rumene do zelene svetlobe Co(II) spojin. One blue-green 1 and one purple copper(II) compound 2 along with and one pink cobalt(II) coordination compound 3 with phenoxyacetic acid ( = HL = C8H7O3) were synthesized and described. A neutral phenoxyacetic acid was added to the copper(II) and cobalt(II) starting compounds, which were dissolved in methanol or water. Additional pyridine neutral ligand nicotinamide was used as well. The isolated compounds were analysed with various methods thereafter, namely with: X-ray powder diffraction, elemental analysis, IR spectroscopy and UV-Vis spectroscopy. The powder difractograms of compounds 1 and 3 correspond to the calculated difractograms of compounds [Cu(L)(L)]6 and [Co(L)2(H2O)2]n, respectively, having structures already determined. No such match was found for the compound 2. According to the elemental analysis for 2, the formulae Cu(L)2(nia)2 (nia = nicotinamide = C6H6N2O) is proposed. A presence of the carboxylic vibrations in the 1600 and 1400 cm-1 range is found in IR spectra of all three compounds. The bands above 3000 cm-1 in the IR spectrum of compound 2 is attributed to the presence of nicotinamide. The colour of the isolated compounds is consistent with the absorption of red light for Cu(II) compounds and yellow to green light for Co(II) compound. |
