<?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>S1870-249X2007000200014</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[(Chloromethyl)diphenylphosphine Oxide Complexes of Tin and Uranium]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kapoor]]></surname>
<given-names><![CDATA[Ramesh N.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cervantes-Lee]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pannell]]></surname>
<given-names><![CDATA[Keith H.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,University of Texas Department of Chemistry ]]></institution>
<addr-line><![CDATA[El Paso Texas]]></addr-line>
<country>USA</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2007</year>
</pub-date>
<volume>51</volume>
<numero>2</numero>
<fpage>122</fpage>
<lpage>128</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-249X2007000200014&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-249X2007000200014&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-249X2007000200014&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[The reactions between (chloromethyl)diphenylphosphine oxide, ClCH2P(O)Ph2 (L) and Me2SnCl2, Ph2SnCl2, Ph3SnCl and UO2(NO3)2 form complexes 1, 2, 3 and 4 respectively. The organotin complexes 1, 2, 3, exhibit a 1:1 ligand metal stoichiometry while the uranyl nitrate (4) complex is a 2:1 complex. The complexes have been characterized by 13C, 119Sn and 31P NMR spectroscopy and their single crystal X-ray structures have also been determined. The chlorine atom of the (chloromethyl)diphenylphosphine oxide does not directly interact either intramolecularly or intermolecularly with either the uranium or tin center as determined by the internuclear distances being greater than the sum of their respective Van der Waal's radii. However, in 1 and 4 there are clear dipolar interactions that result in conformational and molecular alignments due to the presence of the CH2Cl group.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Las reacciones entre el óxido de (clorometil)difenilfosfina ClCH2P(0)Ph2 (L), y Me2SnCl2, Ph2SnCl2, Ph3SnCl y UO2(NO3) forman los complejos 1, 2, 3 y 4 respectivamente. Los complejos de organoestaño 1, 2 y 3, exhiben una estequiometría metal ligando 1:1 mientras que en el complejo de nitrato de uranilo (4) esta es 2:1. Los complejos se han caracterizado por RMN de 13C, 119Sn y 31P y su estructura cristalina ha sido determinada por difracción de rayos X de sus respectivos monocristales. El átomo de cloro del óxido de (clorometil)difenilfosfina no interactúa, ya sea intramolecular o intermolecularmente con el centro métalico uranio o estaño dado que las distancias internucleares son mayores que la suma de los correspondientes radios de Van der Waal's. Sin embargo, en 1 y 4 se manifiesta una clara interacción dipolar que da como resultado un alineamiento conformacional de las moléculas en la estructura cristalina debido a la presencia del grupo CH2Cl.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[(Chloromethyl)diphenyl phosphine oxide]]></kwd>
<kwd lng="en"><![CDATA[Tin]]></kwd>
<kwd lng="en"><![CDATA[Uranium]]></kwd>
<kwd lng="en"><![CDATA[complexes]]></kwd>
<kwd lng="en"><![CDATA[stoichiometry]]></kwd>
<kwd lng="es"><![CDATA[(Clorometil)difenilfosfina]]></kwd>
<kwd lng="es"><![CDATA[estaño]]></kwd>
<kwd lng="es"><![CDATA[uranio]]></kwd>
<kwd lng="es"><![CDATA[complejos]]></kwd>
<kwd lng="es"><![CDATA[estequiometría]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Article</font></p>      <p align="center"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="4"><b>(Chloromethyl)diphenylphosphine Oxide Complexes of Tin and Uranium</b></font></p>  	    <p align="center"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="2"><b>Ramesh N. Kapoor, Francisco Cervantes&#45;Lee and Keith H. Pannell*</b></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><i>Department of Chemistry, The University of Texas at El Paso, El Paso, Texas, 79968, USA.</i> Email: <a href="mailto:kpannell@utep.edu">kpannell@utep.edu</a></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2">Recibido el 15 de enero de 2007    ]]></body>
<body><![CDATA[<br> 	Aceptado el 30 de mayo de 2007</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>  	    <p align="justify"><font face="verdana" size="2">The reactions between (chloromethyl)diphenylphosphine oxide, ClCH<sub>2</sub>P(O)Ph<sub>2</sub> (<b>L</b>) and Me<sub>2</sub>SnCl<sub>2</sub>, Ph<sub>2</sub>SnCl<sub>2</sub>, Ph<sub>3</sub>SnCl and UO<sub>2</sub>(NO<sub>3</sub>)<sub>2</sub> form complexes <b>1, 2, 3</b> and <b>4</b> respectively. The organotin complexes <b>1, 2, 3,</b> exhibit a 1:1 ligand metal stoichiometry while the uranyl nitrate (<b>4</b>) complex is a 2:1 complex. The complexes have been characterized by <sup>13</sup>C, <sup>119</sup>Sn and <sup>31</sup>P NMR spectroscopy and their single crystal X&#45;ray structures have also been determined. The chlorine atom of the (chloromethyl)diphenylphosphine oxide does not directly interact either intramolecularly or intermolecularly with either the uranium or tin center as determined by the internuclear distances being greater than the sum of their respective Van der Waal's radii. However, in <b>1</b> and <b>4</b> there are clear dipolar interactions that result in conformational and molecular alignments due to the presence of the CH<sub>2</sub>Cl group.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> (Chloromethyl)diphenyl phosphine oxide, Tin, Uranium, complexes, stoichiometry.</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">Las reacciones entre el &oacute;xido de (clorometil)difenilfosfina ClCH<sub>2</sub>P(0)Ph<sub>2</sub> (<b>L</b>), y Me<sub>2</sub>SnCl<sub>2</sub>, Ph<sub>2</sub>SnCl<sub>2</sub>, Ph<sub>3</sub>SnCl y UO<sub>2</sub>(NO<sub>3</sub>) forman los complejos <b>1, 2, 3</b> y <b>4</b> respectivamente. Los complejos de organoesta&ntilde;o <b>1, 2</b> y <b>3,</b> exhiben una estequiometr&iacute;a metal ligando 1:1 mientras que en el complejo de nitrato de uranilo (<b>4</b>) esta es 2:1. Los complejos se han caracterizado por RMN de <sup>13</sup>C, <sup>119</sup>Sn y <sup>31</sup>P y su estructura cristalina ha sido determinada por difracci&oacute;n de rayos X de sus respectivos monocristales. El &aacute;tomo de cloro del &oacute;xido de (clorometil)difenilfosfina no interact&uacute;a, ya sea intramolecular o intermolecularmente con el centro m&eacute;talico uranio o esta&ntilde;o dado que las distancias internucleares son mayores que la suma de los correspondientes radios de Van der Waal's. Sin embargo, en <b>1</b> y <b>4</b> se manifiesta una clara interacci&oacute;n dipolar que da como resultado un alineamiento conformacional de las mol&eacute;culas en la estructura cristalina debido a la presencia del grupo CH<sub>2</sub>Cl.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Palabras clave:</b> (Clorometil)difenilfosfina, esta&ntilde;o, uranio, complejos, estequiometr&iacute;a.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    ]]></body>
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