<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0120-6230</journal-id>
<journal-title><![CDATA[Revista Facultad de Ingeniería Universidad de Antioquia]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.fac.ing.univ. Antioquia]]></abbrev-journal-title>
<issn>0120-6230</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ingeniería, Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-62302018000400073</article-id>
<article-id pub-id-type="doi">10.17533/udea.redin.n89a10</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Enantioselective epoxidation of styrene using in-situ generated dimethyldioxirane and dimeric homochiral Mn(III)-Schiff base complex catalyst]]></article-title>
<article-title xml:lang="es"><![CDATA[Epoxidación enantioselectiva de estireno usando dimetildioxirano generado in-situ y un complejo de base de schiff homoquiral dimérico de Mn(III) como catalizador]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Verdugo-Torres]]></surname>
<given-names><![CDATA[Brayan David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cubillos-Lobo]]></surname>
<given-names><![CDATA[Jairo Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Sarmiento]]></surname>
<given-names><![CDATA[Hugo Alfonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Pedagógica y Tecnológica de Colombia Escuela de Ciencias Químicas ]]></institution>
<addr-line><![CDATA[Tunja ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<numero>89</numero>
<fpage>73</fpage>
<lpage>80</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-62302018000400073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-62302018000400073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-62302018000400073&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The enantioselective epoxidation of styrene using in-situ generated dimethyldioxirane (DMD) and dimeric homochiral Mn(III)-Schiff base catalyst 1 has been explored. The parameters evaluated were olefin/oxidant molar ration, catalyst loading, reaction temperature and presence of nitrogen coordinating co-catalysts. Conversions of more than 99% and enantiomeric excess 66% were obtained. The selectivity is complete towards styrene oxide using 2 mol% catalyst loading, 1.36 mmol KHSO5 in 8 ml of water, absence of co-catalyst and 17 °C as reaction temperature. Furthermore, the catalyst could be recycled up to three times with slightly decrease of catalytic activity due mainly to the physical loss of the catalyst during the recovery step and at a lesser extent as a consequence of its oxidative degradation.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se ha explorado la epoxidación enantioselectiva de estireno utilizando dimetildioxirano (DMD) generado in-situ y un complejo de base de Schiff homoquiral dimérico de Mn (III). Los parámetros evaluados fueron la relación molar olefina/oxidante, la cantidad de catalizador, la temperatura de reacción y la presencia de co-catalizadores coordinadores de nitrógeno. Se obtuvieron conversiones por encima de 99% y excesos enantioméricos cercanos al 66%. La reacción fue completamente selectiva hacia el óxido de estireno usando 2% en moles de carga de catalizador, 1.36 mmol de KHSO5 en 8 ml de agua, ausencia de co-catalizador y 17ºC como temperatura de reacción. Además, el catalizador puede reutilizarse hasta tres veces con una leve disminución de la actividad catalítica debido principalmente, a la pérdida física del catalizador durante la etapa de recuperación del catalizador, y en menor medida a su degradación oxidativa.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Enantioselective epoxidation]]></kwd>
<kwd lng="en"><![CDATA[Styrene]]></kwd>
<kwd lng="en"><![CDATA[Dimethyldioxirane]]></kwd>
<kwd lng="en"><![CDATA[Dimeric catalyst]]></kwd>
<kwd lng="en"><![CDATA[catalysts reusability]]></kwd>
<kwd lng="es"><![CDATA[Epoxidación enantioselectiva]]></kwd>
<kwd lng="es"><![CDATA[estireno]]></kwd>
<kwd lng="es"><![CDATA[dimetildioxirano]]></kwd>
<kwd lng="es"><![CDATA[catalizador dimérico]]></kwd>
<kwd lng="es"><![CDATA[reutilización del catalizador]]></kwd>
</kwd-group>
</article-meta>
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