Aktivacijski parametri i kinetički izotopni efekt dimerizacije para-bromnitrozobenzena u kriogenim uvjetima

master's thesis

• Title (english): Activation parameters and kinetic isotope effect for dimerization of para-bromonitrosobenzene under cryogenic coonditions
• Author: Barbara Bogović
• Mentor: Hrvoj Vančik (mentor)
• Committee member: Hrvoj Vančik (predsjednik povjerenstva)
• Committee member: Iva Juranović Cindrić (član povjerenstva)
• Committee member: Josip Požar (član povjerenstva)
• Committee member: Ivana Biljan (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2018-07-13, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

Istraživanje u okviru ovog rada usmjereno je na proširenje znanja o kinetici i mehanizmima
reakcije dimerizacije aromatskih nitrozo spojeva u čvrstom stanju te na određivanje
aktivacijskih parametara reakcije dimerizacije. Kao modelni spoj za kinetička istraživanja
sintetiziran je p-bromnitrozobenzen, a radi određivanja kinetičkog izotopnog efekta
sintetiziran je i 15N izotopno obilježen analog p-bromnitrozobenzena. Praćena je kinetika
dimerizacije p-bromnitrozobenzena pri kriogenim temperaturama te je za dodatno pojašnjenje
strukturnih promjena koje se događaju na molekulskoj razini određen i kinetički izotopni
efekt za reakciju dimerizacije p-bromnitrozobenzena u čvrstom stanju. Reakcija dimerizacije
istražena je nakon kriogene fotodisocijacije dimera pri čemu su nastale molekule monomera u
najpovoljnijoj topokemijskoj konfiguraciji za reakciju, a sve kinetike reakcija praćene su
vremenski razlučenom infracrvenom spektroskopijom.

Abstract (english)

The main goal of the research presented in the thesis was to find out more about the kinetics
and mechanisms of dimerization of the aromatic nitroso compounds in solid state together
with the estimation of the reaction activation parameters. p-bromonitrosobenzene was
synthesized as a model compound for kinetic studies, while 15N isotope labeled analogue of
p-bromonitrosobenzene was prepared te estimate the kinetic isotope effect. The kinetics of
the dimerization of p-bromonitrosobenzene was studied at cryogenic temperatures. For
further explanation of the structural changes occurring at the molecular level kinetic isotopic
effect for the studied dimerization in solid state was measured. Dimerization itself was
investigated after cryogenic photodissociation of dimer molecules, where monomer molecules
were formed in the most favorable topochemical reaction configuration. Kinetics of the
reaction was monitored by time-depended infrared spectroscopy.

• Keywords: aktivacijski parametri; aromatski Cnitrozo spojevi; čvrsto stanje; dimerizacija; fototermičke reakcije; kinetički izotopni efekt; topokemija
• Keywords (english): activation parameters; aromatic C-nitroso compounds; dimerization; kinetic isotope effect; photothermal reactions; solid state; topochemistry
• Language: croatian
• URN:NBN: urn:nbn:hr:217:161890
• 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: 2019-01-14
• Created on: 2018-09-12 09:46:45