Hidroksipiridinski kompleksi bakrovih(II) 5-sulfosalicilatov

Štante, Špela (author), Kozlevčar, Bojan (mentor)

Sintetizirala sem tri bakrove(II) spojine s 5-sulfosalicilno kislino (C7H6O6S = H3L). Sinteze so potekale v vodi ob prisotnosti treh hidroksipiridinov (2-, 3- ali 4OHpy). Poleg naštetih izhodnih spojin, sem za sintezo uporabila tudi gvanidinijev karbonat (CH6N3)2CO3. Izolirane spojine imajo formule: {(CH6N3)[Cu(L)(H2O)](2OHpy)2}n 1, Cu(HL)(3OHpy)2(H2O) 2, (CH6N3)Cu(L)(H2O) 3. Spojina 1 ima znano strukturo s prisotnim ligandom L3- ter nekoordiniranima 2OHpy in gvanidinijevim kationom (CH6N3+). Istovetnost z znano strukturo sem preverila s praškovno XRD analizo. Spojini 2 in 3 nimata znane strukture, a glede na IR in CHN analize sklepam, da je v 2 prisoten poleg HL2- še 3OHpy in brez CH6N3+, v 3 pa brez 4OHpy a z CH6N3+. Z UV-Vis spektroskopijo sem ugotovila, da imata spojini in 1 in 2 različno koordinacijsko sfero, kar se vidi že po različnem zelenem odtenku barve spojin in po različnem položaju d-d traku.

• Language: Slovenian
• Keywords: baker(II), koordinacijske spojine, hidroksipiridin, 5-sulfosalicilna kislina
• 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-149194
• COBISS.SI-ID: 167177219
• Publication date in RUL: 05.09.2023

Secondary language

• Language: English
• Title: Hydroxypyridine complexes of copper(II) 5-sulfosalicylates

Abstract

Three copper(II) compounds with 5-sulfosalicylic acid (C7H6O6S = H3L) were synthesized. The syntheses took place in water in the presence of three hydroxypyridines (2-, 3- or 4OHpy). Besides these initial starting compounds, guanidinium carbonate (CH6N3)2CO3 was also used for the syntheses. These isolated compounds are formulated as: {(CH6N3)[Cu(L)(H2O)](2OHpy)2}n 1, Cu(HL)(3OHpy)2(H2O) 2, (CH6N3)Cu(L)(H2O) 3. The structure of the compound 1 is known, showing a presence of L3- ligand, while 2OHpy and guanidinium cation CH6N3+ being noncoordinated. Identity with the known structure was checked with the XRD analysis. On the other hand, the compounds 2 and 3 reveal no report of their structure, though based on the IR and CHN analysis, HL2- and 3OHpy are present in 2 but without CH6N33+. Differently, L3- and CH6N3+, but not 4OHpy are found in 3. Using UV-Vis spectroscopy for the compounds 1 and 2, different coordination spheres are suggested for them. This is seen by their different green coloration, as well as by a different position of their d-d band.

• Keywords: copper(II), coordination compounds, hydroxypyridine, 5-sulfosalicylic acid