<?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>1870-249X</journal-id>
<journal-title><![CDATA[Journal of the Mexican Chemical Society]]></journal-title>
<abbrev-journal-title><![CDATA[J. Mex. Chem. Soc]]></abbrev-journal-title>
<issn>1870-249X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Química de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-249X2006000300009</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Synthesis, NMR and X-Ray Diffraction Analysis of Boron Complexes Derived from Hydroxychalcones]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes]]></surname>
<given-names><![CDATA[Horacio]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[Ma. Concepción]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores]]></surname>
<given-names><![CDATA[Blanca M.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Rebolledo]]></surname>
<given-names><![CDATA[Héctor]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santillán]]></surname>
<given-names><![CDATA[Rosa]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Farfán]]></surname>
<given-names><![CDATA[Norberto]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Investigación y de Estudios Avanzados Departamento de Química]]></institution>
<addr-line><![CDATA[México Distrito Federal]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Nacional Autónoma de México, Facultad de Química Departamento de Química Orgánica]]></institution>
<addr-line><![CDATA[México Distrito Federal]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2006</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2006</year>
</pub-date>
<volume>50</volume>
<numero>3</numero>
<fpage>106</fpage>
<lpage>113</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-249X2006000300009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-249X2006000300009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-249X2006000300009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[The synthesis of a series of "push-pull" boron complexes obtained by reaction of hydroxychalcones with borontrifluoride ether-ate and diphenylboronic acid is described. These derivatives have potential application in non-linear optics, since they present a conjugated &#960; system, a boron atom which can act as acceptor and a donor substituent at the para position.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[El presente trabajo describe la síntesis de una serie de complejos de boro "push-pull" preparados por reacción de hidroxichalconas con trifluoroboro eterato y ácido difenilborónico. Estos complejos podrían tener buenas propiedades de óptica no lineal, ya que presentan un sistema &#960;, un átomo de boro que puede actuar como el grupo aceptor y el sustituyente en la posición para que actúa como el grupo donador.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Boron complexes]]></kwd>
<kwd lng="en"><![CDATA[hydroxychalcones]]></kwd>
<kwd lng="en"><![CDATA[diphenylboronic acid]]></kwd>
<kwd lng="es"><![CDATA[Complejos de Boro]]></kwd>
<kwd lng="es"><![CDATA[hidroxichalconas]]></kwd>
<kwd lng="es"><![CDATA[ácido difenilborónico]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Article</font></p> 	    <p align="justify">&nbsp;</p> 	    <p align="center"><font face="verdana" size="4"><b>Synthesis, NMR and X&#45;Ray Diffraction Analysis of Boron Complexes Derived from Hydroxychalcones</b></font></p> 	    <p align="justify">&nbsp;</p> 	    <p align="center"><font face="verdana" size="2"><b>Horacio Reyes,<sup>1</sup> Ma. Concepci&oacute;n Garc&iacute;a,<sup>1</sup> Blanca M. Flores,<sup>1</sup> H&eacute;ctor L&oacute;pez&#45;Rebolledo,<sup>1</sup> Rosa Santill&aacute;n,<sup>1</sup> Norberto Farf&aacute;n*<sup>2</sup></b><sup></sup></font></p> 	    <p align="justify">&nbsp;</p> 	    <p align="justify"><font face="verdana" size="2"><sup><i>1</i></sup><i>&nbsp;Departamento de Qu&iacute;mica, Centro de Investigaci&oacute;n y de Estudios Avanzados del Instituto Polit&eacute;cnico Nacional, Apdo. Postal 14&#45;740, 07000 M&eacute;xico D.F., M&eacute;xico</i></font></p> 	    <p align="justify"><i><font face="verdana" size="2"><sup>2</sup> Departamento de Qu&iacute;mica Org&aacute;nica, Facultad de Qu&iacute;mica, Universidad Nacional Aut&oacute;noma de M&eacute;xico, Circuito Escolar, Ciudad Universitaria, M&eacute;xico 04510, D. F.</font></i><font face="verdana" size="2"></font></p> 	    <p align="justify">&nbsp;</p> 	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Recibido el 16 de febrero del 2006.     <br>     Aceptado el 31 de mayo del 2006.</font></p> 	    <p align="justify">&nbsp;</p> 	    <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p> 	    <p align="justify"><font face="verdana" size="2"> The synthesis of a series of "push&#45;pull" boron complexes obtained by reaction of hydroxychalcones with borontrifluoride ether&#45;ate and diphenylboronic acid is described. These derivatives have potential application in non&#45;linear optics, since they present a conjugated &pi; system, a boron atom which can act as acceptor and a donor substituent at the <i>para</i> position.</font></p> 	    <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> Boron complexes, hydroxychalcones, diphenylboronic acid</font>.</p> 	    <p align="justify">&nbsp;</p> 	    <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p> 	    <p align="justify"><font face="verdana" size="2"> El presente trabajo describe la s&iacute;ntesis de una serie de complejos de boro "push&#45;pull" preparados por reacci&oacute;n de hidroxichalconas con trifluoroboro eterato y &aacute;cido difenilbor&oacute;nico. Estos complejos podr&iacute;an tener buenas propiedades de &oacute;ptica no lineal, ya que presentan un sistema &pi;, un &aacute;tomo de boro que puede actuar como el grupo aceptor y el sustituyente en la posici&oacute;n <i>para</i> que act&uacute;a como el grupo donador</font>.</p> 	    <p align="justify"><font face="verdana" size="2"><b>Palabras clave:</b> Complejos de Boro, hidroxichalconas, &aacute;cido difenilbor&oacute;nico. </font></p> 	    ]]></body>
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