diplomsko delo
Nika Marinč (Author), Bojan Kozlevčar (Mentor)

Abstract

Sintetizirala sem tri kobaltove(II) koordinacijske spojine z anionom benzojske kisline (C7H6O2 = HL) iz izhodnega kobaltovega(II) nitrata heksahidrata. V dveh primerih sem uporabila tudi dodaten nevtralen dušikov donorski ligand nikotinamid oziroma 2-aminopiridin. Kot topilo sem uporabila vodo ali acetonitril. Nastale so spojina Co(L)(OH) 1, spojina [Co(L)2(C6H6N2O)2(H2O)2] 2 in spojina [Co(L)2(C5H6N2)2] 3. Prisotnost Co(II) pri vseh spojinah je najbolj jasna v UV-Vis spektru s trakom pri 500 nm. V IR spektrih opazimo O-H in N-H trakove nad 3000 cm-1 za različne dodatne ligande poleg benzoatnega aniona. Nižja vrednost magnetnega momenta pri spojini 1 od ostalih dveh se sklada z UV delom UV-Vis spektra, saj nakazuje drugačno, verjetno mostovno povezavo ligandov pri tej spojini.

Keywords

koordinacijske spojine;kobalt(II);ligandi;benzojska kislina;nikotinamid;2-aminopiridin;acetonitril;voda;diplomske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [N. Marinč]
UDC: 546.73:547.581.2(043.2)
COBISS: 16697091 Link will open in a new window
Views: 1146
Downloads: 311
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Other data

Secondary language: English
Secondary title: Cobalt compounds with bezoic acid
Secondary abstract: Three coordination compounds with benzoic acid anion (C7H6O2 = HL) were synthesized using cobalt(II) nitrate hexahydrate. A neutral nitrogen donor ligands nicotinamide and 2-aminopyridine were additionally added in two cases. Either water or acetonitrile were applied as a solvent. Thus, Co(L)(OH) 1, [Co(L)2(C6H6N2O)2(H2O)2] 2 and [Co(L)2(C5H6N2)2] 3 compounds were isolated. A Co(II) presence in all compounds is most clearly visible within UV-Vis spectra with a band ati 500 nm. The IR spectra reveal O-H and N-H bands above 3000 cm-1 due to different additional ligands besides the initial benzoat anion. A lower magnetic moment value for the compound 1 compared to the others, is in agreement with the UV section of the UV-Vis spectra, suggesting different, probably bridging ligand coordination, only for this compound.
Secondary keywords: cobalt(II);benzoic acid;nicotinamide;2-aminopyridine;acetonitrile;water;
Type (COBISS): Bachelor thesis/paper
Study programme: 1000374
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo
Pages: 35 f.
ID: 11724506