Strukturne transformacije mononuklearnih kompleksa molibdena(VI) s derivatima 4-aminobenzhidrazida

master's thesis

• Title (english): Structural transforamtions of mononuclear molybdenum(VI) complexes with 4-aminobenzhydrazide derivatives
• Author: Katarina Zrnc
• Mentor: Višnja Vrdoljak (mentor)
• Committee member: Višnja Vrdoljak (predsjednik povjerenstva)
• Committee member: Morana Dulić (član povjerenstva)
• Committee member: Iva Juranović Cindrić (član povjerenstva)
• Committee member: Marina Cindrić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2018-11-30, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

Sintetizirano je pet novih molibdenskih(VI) kompleksa s derivatima 4-aminobenzhidrazida koji sadrže O i N donorne atome i proučavani su uvjeti njihovih nastajanja. Okarakterizirani su kao mononuklearni [MoO2(Sal‒4‒HBNHacac)(MeOH)] (1), [MoO2(Sal‒4‒HBNHacac)(EtOH)] (2), [MoO2(Sal‒4‒HBNHacac)(i‒PrOH)] (3) i [MoO2(Sal‒4‒HBNH2)(MeOH)] (4) ili dinuklearni [MoO2(Sal‒4‒HBNH2)]2 (5) kompleksi. Dinuklearni kompleks [MoO2(Sal‒4‒HBNH2)]2 (5) je također pripremljen strukturnom transformacijom mononuklearnog kompleksa [MoO2(Sal‒4‒HBNH2)(MeOH)] (4) u acetonitrilu, dok su kompleksi 1‒3 također dobiveni transformacijom kompleksa 4 u prisutnosti acetilacetona. U svim kompleksima MoO22 + jezgra je koordinirana tridentatim ONO ligandom i O‒donornom molekulom (MeOH, EtOH ili i‒PrOH) ili amino skupinom susjedne molekule. Molekularna i kristalna struktura svih spojeva određena je rentgenskom difrakcijom na monokristalnom uzorku. Difrakcijom rentgenskog zračenja na prahu pokazala je izostrukturnost 1‒3 kompleksa. Svi kompleksi dodatno su okarakterizirani kemijskom analizom, infracrvenom spektroskopijom i termičkom analizom.

Abstract (english)

Five new molybdenum(VI) complexes with 4‒aminobenzhydrazide derivatives containing O and N donor atoms were synthesized and the conditions of their formation were studied. They were characterized as mononuclear [MoO2(Sal‒4‒HBNHacac)(MeOH)] (1), [MoO2(Sal‒4‒HBNHacac)(EtOH)] (2), [MoO2(Sal‒4‒HBNHacac)(i‒PrOH)] (3) and [MoO2(Sal‒4‒HBNH2)(MeOH)] (4) or dinuclear [MoO2(Sal‒4‒HBNH2)]2 (5) complexes. The dinuclear complex [MoO2(Sal‒4‒HBNH2)]2 (5) was prepared also by the structural transformation of the mononuclear complex [MoO2(Sal‒4‒HBNH2)(MeOH)] (4) in acetonitrile, whereas complexes 1‒3 were obtained also by the transformation of 4 in the presence of acetylacetone. In all complexes the MoO22+ core is coordinated by a tridentate ONO ligand and the O‒donor molecule (MeOH, EtOH or i‒PrOH) or amino group of the neighboring molecule. Molecular and crystal structure of all compounds was determined by the single‒crystal X‒ray diffraction method. Powder X-ray diffraction showed isostructurality of 1‒3 complexes. All complexes were additionally characterized by chemical analysis, infrared spectroscopy and thermal analysis.

• Keywords: derivati 4‒aminobenzhidrazida; dioksomolibden(VI) kompleksi
• Keywords (english): 4‒aminobenzhydrazide derivatives; dioxomolybdenum(VI) complexes
• Language: croatian
• URN:NBN: urn:nbn:hr:217:440065
• 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: 2020-12-01
• Created on: 2018-12-03 13:17:08