Priprava in karakterizacija koordinacijskih spojin kobaltovega(II) nitrata in 2-(hidroksimetil)piridina

Pečkaj, Anja (author), Počkaj, Marta (mentor)

Izvedli smo več reakcij med kobaltovim(II) nitratom heksahidratom in ligandom 2-(hidroksimetil)piridinom ob različnih množinskih razmerjih reaktantov v izbranih topilih: acetonu in acetonitrilu. Pripravili smo dve novi spojini [Co(OH2)2(2hmp)2](NO3)2 in [Co(2hmp)3](NO3)2. V primeru nastanka kompleksa, kjer je množinsko razmerje ligand:kovina 3:1, so se pojavili tudi kristali solvata. Nastale produkte smo okarakterizirali z infrardečo spektroskopijo, elementno CHN analizo, termogravimetrijo in rentgensko praškovno difrakcijo ter jim določili kristalno strukturo z difrakcijo na monokristalu. V primeru nastanka solvata smo zaradi njegove nestabilnosti lahko določili le kristalno strukturo.

• Language: Slovenian
• Keywords: kobalt, 2-(hidroksimetil)piridin, monokristal, koordinacijske spojine
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2021
• PID: 20.500.12556/RUL-129655
• COBISS.SI-ID: 76018691
• Publication date in RUL: 06.09.2021

Secondary language

• Language: English
• Title: Synthesis and characterization of coordination compounds of cobalt(II) nitrate and 2-(hydroxymethyl)pyridine

Abstract

Several reactions using different molar ratios of cobalt(II) nitrate hexahydrate and 2-(hydroxymethyl)pyridine in selected solvents (acetone and acetonitrile), were performed. Two new compounds, [Co(OH2)2(2hmp)2](NO3)2 and [Co(2hmp)3](NO3)2, have been prepared. When compound with ligand to metal molar ratio of 3:1 was synthetized, solvate crystals were also formed. The products were characterized by infrared spectroscopy, CHN elemental analysis, thermogravimetry and Xray powder diffraction, crystal structure determination from single-crystal diffraction data was also performed. In case of unstable solvate compound, only its crystal structure was determined.

• Keywords: cobalt, 2-(hydroxymethyl)pyridine, single crystal, coordination compounds