Spojine bakra, kobalta in cinka z izonikotinamidom in 5-sulfosalicilno kislino

Pasar, Manca (author), Kozlevčar, Bojan (mentor)

Sintetizirane so bile tri koordinacijske spojine z anionom 5-sulfosalicilne kisline (H3L) in izonikotinamidom (C6H6N2O). Te spojine so modro-zelena bakrova(II) 1, rožnata kobaltova(II) 2 in bela cinkova(II) spojina 3. Spojinama z bakrom in cinkom je bila že določena struktura, in sicer polimerna {[Cu(HL)(C6H6N2O)(H2O)2]·2H2O}n, oziroma monomerna [Zn(HL)(C6H6N2O)2(H2O)2]∙H2O. Praškovna posnetka in CHN elementne analize izoliranih spojin se skladajo z znanima strukturama. Spojini 2 s kobaltom nisem našla znane strukture, zato svojih praškovnih posnetkov za to spojino nisem primerjala z znano strukturo. Glede na podobnost CHN analize, ki se najbolje ujema s formulo Co(HL)(C6H6N2O)(H2O)5 in tako tudi s podatki za spojino 1 pa lahko predlagam, da ima strukturo verjetno podobno, kot jo ima spojina 1. IR spektri kažejo prisotnost vseh ligandov, ki so v formulah teh spojin. Elektronski spektri treh spojin se zelo razlikujejo, kar je posledica treh različnih kovin prehoda ter različne razporeditve ligandov v koordinacijskih sferah. Barva spojin, ki sem jih izolirala se sklada z absorbcijo rdeče svetlobe Cu(II) spojin, rumeno-zelene svetlobe Co(II) spojin in odsotnostjo d-d trakov za Zn(II) spojino.

• Language: Slovenian
• Keywords: baker(II), kobalt(II), cink(II), izonikotinamid, 5-sulfosalicilna 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-149518
• COBISS.SI-ID: 163615491
• Publication date in RUL: 07.09.2023

Secondary language

• Language: English
• Title: Copper, cobalt and zinc compounds with isonicotinamide and 5-sulfosalcylic acid

Abstract

Three coordination compounds with 5-sulfosalicylic acid (H3L) and isonicotinamide (C6H6N2O) were synthesized. These compounds are blue-green copper(II) 1, pink cobalt(II) 2 and white zinc(II) compound 3. The structures of copper and zinc compound have already been determined as polymeric {[Cu(HL)(C6H6N2O)(H2O)2]·2H2O}n, and monomeric Zn(HL)(C6H6N2O)2(H2O)2]·2H2O. Powder diffractograms and CHN elemental analyses of the isolated compounds corroborate with the known structures. No known structure for the compound 2 with cobalt was found, so its powder diffractogram cannot be compared with the known structure. Due to a similarity of the CHN analysis of 2, with the proposed formulae of Co(HL)(C6H6N2O)(H2O)5, and the CHN data for the compound 1, similar structures for them are suggested. The IR spectra of all three title compounds are in accordance with a presence of all ligands written in their respective formulae. On the other hand, the electronic spectra of all three compounds differ clearly, being in agreement with three different metals and different arrangement of the ligands in their coordination spheres. The colours of the isolated compounds are consistent with the absorption of red light for Cu(II) compound, yellow-green for Co(II) compound along with an absence of the d-d bands for the Zn(II) compound.

• Keywords: copper(II), cobalt(II), zinc(II), isonicotinamide, 5-sulfosalicylic acid, coordination compounds