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<front>
<journal-meta>
<journal-id journal-id-type="publisher-id">SATNT</journal-id>
<journal-title-group>
<journal-title>Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie</journal-title>
</journal-title-group>
<issn pub-type="ppub">0254-3486</issn>
<issn pub-type="epub">2222-4173</issn>
<publisher>
<publisher-name>AOSIS</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="publisher-id">SATNT-36-1466</article-id>
<article-id pub-id-type="doi">10.4102/satnt.v36i1.1466</article-id>
<article-categories>
<subj-group subj-group-type="heading">
<subject>Referaatopsomming</subject>
</subj-group>
</article-categories>
<title-group>
<article-title>Fe-gekataliseerde alkeenoksidasie: Effek van steriese en elektroniese parameters op nieheemoksigenase-aktiwiteit</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author" corresp="yes">
<contrib-id contrib-id-type="orcid">http://orcid.org/0000-0002-5806-5152</contrib-id>
<name>
<surname>Swartzberg</surname>
<given-names>Lizette</given-names>
</name>
<xref ref-type="aff" rid="AF0001">1</xref>
</contrib>
<contrib contrib-type="author">
<contrib-id contrib-id-type="orcid">http://orcid.org/0000-0001-5786-5409</contrib-id>
<name>
<surname>van Sittert</surname>
<given-names>Cornie G.C.E.</given-names>
</name>
<xref ref-type="aff" rid="AF0001">1</xref>
</contrib>
<contrib contrib-type="author">
<contrib-id contrib-id-type="orcid">http://orcid.org/0000-0002-7942-8557</contrib-id>
<name>
<surname>Swarts</surname>
<given-names>Andrew J.</given-names>
</name>
<xref ref-type="aff" rid="AF0001">1</xref>
</contrib>
<aff id="AF0001"><label>1</label>Department of Chemistry, North-West University, South Africa</aff>
</contrib-group>
<author-notes>
<corresp id="cor1"><bold>Corresponding author:</bold> Lizette Swartzberg, <email xlink:href="lizetteswartzberg@gmail.com">lizetteswartzberg@gmail.com</email></corresp>
</author-notes>
<pub-date pub-type="epub"><day>04</day><month>07</month><year>2017</year></pub-date>
<pub-date pub-type="collection"><year>2017</year></pub-date>
<volume>36</volume>
<issue>1</issue>
<elocation-id>1466</elocation-id>
<permissions>
<copyright-statement>&#x00A9; 2017. The Authors</copyright-statement>
<copyright-year>2017</copyright-year>
<license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/2.0/">
<license-p>Licensee: AOSIS. This work is licensed under the Creative Commons Attribution License.</license-p>
</license>
</permissions>
<abstract>
<p><bold>Fe catalysed alkene oxidation: Effect of steric and electronic properties on non-heme oxygenase activity.</bold> The oxidation of C-H bonds is an important transformation in organic synthesis. A range of (<italic>R,R</italic>)-bis-heterocyclic diamine ligands and their corresponding Fe(II) complexes were synthesised and characterised. These complexes were evaluated as catalysts in the oxidation of <italic>cis</italic>-cyclooctene. This substrate was selectively oxidised to cyclooctene epoxide.</p>
</abstract>
</article-meta>
</front>
<body>
<sec id="s0001">
<title></title>
<p>Koolstof-heteroatoom- (C-X) bindings is algemeen in organiese verbindings wat as boustene in die chemiese en farmaseutiese industrie gebruik word (Correa, Manche&#x00F1;o &#x0026; Bolm <xref ref-type="bibr" rid="CIT0002">2008</xref>). Die fokus is tans op die transformasie van koolwaterstowwe (alkane en alkene) van verskillende bronne soos olie en natuurlike gas (Derouane et al. <xref ref-type="bibr" rid="CIT0003">2006</xref>). Deur hierdie alkane en alkene te transformeer, kan nuwe paaie na meer waardevolle produkte ontdek word. Produkte wat gevorm kan word, sluit in aldehiede, alkohole, ketone, epoksiede en <italic>cis</italic>-diole (Mac Leod et al. <xref ref-type="bibr" rid="CIT0005">2010</xref>). Vanwe&#x00EB; die verskillende toepassings van hierdie produkte, is die fokus om &#x2019;n katalisesisteem te vind wat &#x2019;n wye reeks van organiese substrate kan oksideer en funksionaliseer.</p>
<p>Die natuur het die probleem van selektiewe C-H-oksidasie opgelos deur gebruik te maak van ensieme. Hierdie ensieme dien as &#x2019;n inspirasie vir chemici en kan as &#x2019;n bloudruk gebruik word om soortgelyke verbindings in die laboratorium te sintetiseer. Alhoewel daar baie belangstelling in di&#x00E9; reaksies is, het die katalisesisteme wat geraporteer is, &#x2019;n paar beperkings. Van die belangrikste en algemeenste probleme van hierdie oksidasiereaksies is die lae produkselektiwiteit sowel as die swak regio- en stereoselektiwiteit (Bordeaux, Galarneau &#x0026; Drone <xref ref-type="bibr" rid="CIT0001">2012</xref>).</p>
<p>Die gebruik van omgewingsvriendelike reaksietoestande word al hoe belangriker en die fokus is daarom die ontwikkeling van &#x2019;n chemies effektiewe atoom-, energie- en oksidasieproses om alkane en alkene te transformeer (Fernandes et al. <xref ref-type="bibr" rid="CIT0004">2011</xref>).</p>
<p>&#x2019;n Stel van chirale <italic>R,R</italic>-bis(heterosikliese)diamienligande en hul Fe(II)-triflaatkomplekse (<xref ref-type="fig" rid="F0001">Figuur 1</xref>) is voorberei. Hierdie komplekse is met &#x2019;n verskeidenheid van spektroskopiese en analitiese tegnieke gekarakteriseer. Dit sluit in KMR (<sup>1</sup>H, <sup>13</sup>C), MS, UV-Vis-spektroskopie en elementanalise. Na die sintese van die gewenste komplekse, is dit ge&#x00EB;valueer as katalisatore in die oksidasie van <italic>cis</italic>-siklo-okteen. Die substraat word selektief na siklo-okteenepoksied geoksideer.</p>
<fig id="F0001">
<label>FIGUUR 1</label>
<caption><p>Fe(II)-bis(heterosikliese)diamien komplekse om as katalisatore te evalueer.</p></caption>
<graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="SATNT-36-1466-g001.tif"/>
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<fn-group>
<fn><p><bold>How to cite this article:</bold> Swartzberg, L., Van Sittert, C.G.C.E. &#x0026; Swarts, A.J., 2017, &#x2018;Fe-gekataliseerde alkeenoksidasie: Effek van steriese en elektroniese parameters op nieheemoksigenase-aktiwiteit&#x2019;, <italic>Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie</italic> 36(1), a1466. <ext-link ext-link-type="uri" xlink:href="https://doi.org/10.4102/satnt.v36i1.1466">https://doi.org/10.4102/satnt.v36i1.1466</ext-link></p></fn>
<fn><p><bold>Note:</bold> A selection of conference proceedings: Student Symposium in Science, 27&#x2013;28 October 2016, North-West University, South Africa. Organising committee: Mr Rudi Pretorius (Department of Geography, University of South Africa); Dr Hertzog Bisset (South African Nuclear Energy Corporation [Necsa]); Dr Andrew Swarts (School of Physical and Chemical Sciences, North-West University).</p></fn>
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