Reakcije nastajanja oksalatomolibdata s Co(III) etilendiaminskim kationima

master's thesis

• Title (english): Formation reactions of oxalatomolybdates with Co(III) ethylenediamine cations
• Author: Glorija Medak
• Mentor: Marina Cindrić (mentor)
• Committee member: Marina Cindrić (predsjednik povjerenstva)
• Committee member: Sanda Rončević (član povjerenstva)
• Committee member: Ivan Kodrin (član povjerenstva)
• Committee member: Višnja Vrdoljak (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2018-06-06, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

U okviru ovog diplomskog rada ispitivani su uvijeti nastajanja kompleksnih soli s
[Co(EDDA)(en)]+ kationom i oksalatomolibdatima, [Mo2O5(ox)2(H2O)2]2- i [MoO3(ox)]2-, kao
anionima. Reakcije su provedene u otopini i to pri sobnoj temperaturi te u uvijetima
povišenog tlaka i temperature te mehanokemijski, odnosno u čvrstom stanju s i bez dodatka
male količine otapala, vode, odnosno acetona. Reakcije provedene u otopni dale su kao
produkte dihidratni i tetrahidratni solvat [Co(EDDA)(en)]2[Mo2O5(ox)2(H2O)2. Reakcije s
[MoO3(ox)]2- u vodenoj otopini nisu dale produkt, no mehanokemijskom sintezom uz dodatak
male količine acetona u kombinaciji sa starenjem kao produkt reakcije dobiven je
[CoEDDA(en)]2(enH2)[CoMo6O24]·3H2O. Svi izolirani produkti identificirani su na osnovi
rezultata kemijske analize, termogravimetrijske analize i podataka iz infracrvenih spektara.
Izoliranim kompleksima odreĎena je i molekulska i kristalna struktura metodom difrakcije
rentgenskih zraka na jediničnom kristalu.

Abstract (english)

In this diploma thesis we researched conditions for formation of complex salts containing
[Co(EDDA)(en)]+ as cation and oxalatomolybdates, [Mo2O5(ox)2(H2O)2]2- i [MoO3(ox)]2-, as
anions. Reactions were conducted in solution at room temperature, in the conditions of high
pressure and high temperature, and in the solid state as liquid assisted grinding with water or
acetone. Reactions in the solution resulted in formation of dihydrate and tetrahydrate solvate
of [Co(EDDA)(en)]2[Mo2O5(ox)2(H2O)2. Reactions with [MoO3(ox)]2- in water solution
didn’t result in the formation of product, but liquid assisted grinding with few drops of
acetone in the combination with aging resulted in formation of
[CoEDDA(en)]2(enH2)[CoMo6O24]·3H2O. All products were identified by chemical analysis,
termogravimetric analysis and infrared spectroscopy. Crystal and molecular structure of
isolated products was determined using single crystal X-ray diffraction.

• Keywords: heteropolioksometalati; kompleksi kobalta(III); kristalna stuktura. mehanokemija; oksalatomolibdati
• Keywords (english): cobalt(III) complexes; crystal structure; heteropolyoxometalates; mechanochemistry; oxalatomolybdates
• Language: croatian
• URN:NBN: urn:nbn:hr:217:821903
• Study programme: Title: Graduate university studies in chemistry; specializations in: Research programme; Course: Research programme; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra kemije (magistar/magistra kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2020-06-06
• Created on: 2018-06-07 09:30:11