Cinkove spojine s pirazinojsko kislino

Derganc, Klara (author), Petriček, Saša (mentor)

Izvedli smo reakcije med cinkovim kloridom ali cinkovim acetatom dihidratom in pirazinojsko kislino (pyzaH) v različnih topilih, etanolu ali acetonitrilu. V nekaterih poskusih smo za boljše raztapljanje dodali vodo. Množinska razmerja med cinkovimi ioni in pyzaH so bila 1 : 2. Izolirali smo kristale nove spojine [ZnCl$_2$(pyzaH)$_2$·2H$_2$O] in kristale že znane spojine [Zn(H$_2$O)$_2$(pyza)$_2$], kar smo potrdili z rentgensko strukturno analizo. Nastale produkte smo okarakterizirali še z infrardečo spektroskopijo, CHN in termično analizo. Ugotovili smo, da je potekala deprotonacija pyzaH in vezava anionskega liganda pyza$^−$ na cinkov ion, če smo organskemu topilu dodali vodo.

• Language: Slovenian
• Keywords: cink, pirazinojska kislina, koordinacijske spojine
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2023
• PID: 20.500.12556/RUL-149232
• COBISS.SI-ID: 167360259
• Publication date in RUL: 05.09.2023

Secondary language

• Language: English
• Title: Zinc compounds with pyrazinoic acid

Abstract

We performed reactions between zinc chloride or zinc acetate dihydrate and pyrazinoic acid (pyzaH) in different solvents, ethanol or acetonitrile. In some experiments, water was added for better dissolution. The mol ratio between zinc ions and pyzaH was 1 : 2. Crystals of the new compound [ZnCl$_2$(pyzaH)$_2$·2H$_2$O] and crystals of the already known compound [Zn(H$_2$O)$_2$(pyza)$_2$] were isolated, which was confirmed by X-ray structural analysis. Infrared spectroscopy, CHN and thermal analysis were used to further characterize the resulting products. We found that the deprotonation of pyzaH and the binding of the anionic ligand pyza$^−$ to the zinc ion took place when water was added to the organic solvent.

• Keywords: zinc, pyrazinoic acid, coordination compounds