Transformacije mononuklearnih, dinuklearnih i polinuklearnih kompleksa molibdena(VI) u čvrstom stanju i u otopini

master's thesis

• Title (english): Transformations of mononuclear, dinuclear and polynuclear molybdenum(VI) complexes in solid state and solution
• Author: Lucija Podrug
• Mentor: Jana Pisk (mentor)
• Committee member: Jana Pisk (predsjednik povjerenstva)
• Committee member: Nives Galić (član povjerenstva)
• Committee member: Đani Škalamera (član povjerenstva)
• Committee member: Mirta Rubčić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2020-10-23, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

U sklopu ovog diplomskog rada pripravljena su i okarakterizirana dva hidrazonska liganda,
(E)-N'-(2,3-dihidroksibenziliden)-2-hidroksibenzohidrazon (H2L1) i (E)-N'-(2,4-
dihidroksibenziliden)-2-hidroksibenzohidrazon (H2L2). U reakcijama sa [MoO2(acac)2] i 4,4-
bipiridinom pripravljeni su različiti kompleksi molibdena(VI). U metanolnim otopinama su
sintetizirani mononuklearni kompleksni spojevi, [MoO2(L)(MeOH)]. Reakcijom u etanolu su
nastali mononuklearni, [MoO2(L2)(EtOH)] i polinuklearni kompleksni spoj, [MoO2(L1)]n. U
acetonitrilou nastaju polinuklearni [MoO2(L1)]n i [MoO2(L2)]nxCH3CN, dinuklearni
[MoO2(L2)]2x(4,4-byp) i mononuklearni kompleksni spoj [MoO2(L2)(H2O]. Također,
polinuklearni [MoO2(L1)]n i dinuklearni [MoO2(L2)]2 kompleksni spojevi nastaju u
diklormetanu. Reakcije sa 4,4-bipiridinom rezultiraju nastankom dimernih struktura sa ili bez
kristalnog otapala (metanol ili acetonitril). Ligandi i kompleksni spojevi analizirani su
infracrvenom spektroskpijom, difrakcijom rendgenskog zračenja na polikristalnom uzorku,
termogravimetrijskom analizom, diferencijalnom skenirajućom kalorimetrijom te nuklearnom
magnetskom rezonancijom. Difrakcijom rendgenskog zračenja na jediničnom kristalu
određena je molekulska i kristalna struktura 5 kompleksnih spojeva molibdena(VI).

Abstract (english)

As part of this diploma thesis, two hydrazone ligands, (E)-N'-(2,3-dihydroxybenzylidene)-2-
hydroxybenzohydrazone (H2L1) and (E)-N'-(2,4-dihydroxybenzylidene)-2-
hydroxybenzohydrazone (H2L2), were prepared and characterized. In reactions with
MoO2(acac)2 and 4,4-bipyridne were prepared various molybdenum(VI) complexes. In
methanol solutions were synthesized mononuclear complexes, [MoO2(L)(MeOH)]. Reactions
in ethanol gave mononuclear, [MoO2(L2)(EtOH)] and polynuclear complex [MoO2(L1)]n.
With acetonitrile are formed polynuclear [MoO2(L1)]n and [MoO2(L2)]nxCH3CN, dinuclear
[MoO2(L2)]2 x (4,4-byp) and mononuclear complex [MoO2(L2)(H2O)]. Also, polynuclear
[MoO2(L1)]n and dinuclear [MoO2(L2)]2 are formed in dichloromethane. Reactions with 4,4-
bipyridine result in the formation of dmeric structures with or without crystalline solvend
(methanol or acetonitrile). Ligands and complexes were analyzed by infrared spectroscopy,
X-ray diffraction on a polycrystalline sample, thermogravimetric analysis, differential
scanning calorimetry and nuclear magnetic resonance. Molecular and crystal structure of 5
molybdenum(VI) complexes were determined by single-crystal X-ray diffraction.

• Keywords: 4; 4-bipiridin; dinuklearni kompleksi; hidrazoni; kompleksi molibdena(VI); mononuklearni kompleksi; polinuklerani kompleksi; transformacije
• Keywords (english): 4; 4-bipyridine; dinuclear complex; hydrazone; molybdenum(VI) complex; mononuclear complex; polynuclear complex; transformations
• Language: croatian
• URN:NBN: urn:nbn:hr:217:931235
• 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: 2022-10-23
• Created on: 2020-11-03 13:27:33