<?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>S1870-249X2019000300056</article-id>
<article-id pub-id-type="doi">10.29356/jmcs.v63i3.535</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Electrocatalytic Production of Hydrogen Gas by a Cobalt Formamidinate Complex]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Wu]]></surname>
<given-names><![CDATA[Yanyu]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguirre Quintana]]></surname>
<given-names><![CDATA[Luis M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ventura]]></surname>
<given-names><![CDATA[Karen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barraza Alvarez]]></surname>
<given-names><![CDATA[Isabel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Metta-Magaña]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villagrán]]></surname>
<given-names><![CDATA[Dino]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,The University of Texas at El Paso Department of Chemistry and Biochemistry ]]></institution>
<addr-line><![CDATA[El Paso Texas]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<volume>63</volume>
<numero>3</numero>
<fpage>56</fpage>
<lpage>69</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-249X2019000300056&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-249X2019000300056&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-249X2019000300056&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A molecular cobalt complex, Co(DippF)2 (where DippF is the anion of N,N&#8217;-bis[2,6-diisopropylphenyl]-formamidine), (1), is able to electrochemically produce hydrogen gas from the reduction of organic acids in homogeneous solutions. Compound 1 has a distorted square planar structure as evidenced through X-ray crystallography studies, and an effective magnetic moment of 4.13, obtained by the Evans method, that corresponds to three unpaired electrons. Compound 1 shows an irreversible cathodic peak at -1.59 V vs Fc/Fc+ which is assigned to the reduction of CoII to CoI. In the presence of organic acids the onset of catalytic current is observed at -1.2 V, -1.45 V and -1.89 V vs. Fc/Fc+ with p-toluenesulfonic acid, benzoic acid and phenol as the proton source, respectively, in MeCN as the solvent. Detection of hydrogen gas was obtained by GC-MS with Faradaic efficiencies ranging from 85% to 100%. Kinetic studies using foot-of-the-wave analysis (FOWA) reveal a linear dependence of the observed rate constant, k obs, against acid concentration in the range of 0.065 to 10.02 s-1 .]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Un complejo molecular de cobalto, Co(DippF)2 (donde DippF es el anión de la N,N&#8217;-bis[2,6-diisopropilfenil]-formamidina), (1), es capaz de producir gas hidrógeno electroquímicamente mediante la reducción de ácidos orgánicos en soluciones homogéneas. El compuesto 1 tiene una estructura cuadrada plana distorsionada como se evidencia por estudios de cristalografía de rayos-X, y un momento magnético efectivo de 4.13, obtenido por el método de Evans, que corresponde a tres electrones no apareados. El compuesto 1 muestra un pico catódico irreversible a -1.59 V contra Fc/Fc+ que es asignado a la reducción de CoII a CoI. En la presencia de ácidos orgánicos el principio de corriente catalítica se observa a -1.2 V, -1.45 V y -1.89 V vs. Fc/Fc+ con ácido p-toluensulfónico, ácido benzoico y fenol como la fuente de protones, respectivamente, en MeCN como el solvente. La detección de gas hidrógeno fue obtenida por GC-MS con eficiencias faradaicas de 85% a 100%. Estudios cinéticos usando análisis de base de onda (FOWA por sus siglas en inglés) revelan una dependencia lineal de la constante de reacción observada, kobs, contra la concentración de ácido en el rango de 0.065 a 10.02 s-1.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[cobalt]]></kwd>
<kwd lng="en"><![CDATA[formamidinate]]></kwd>
<kwd lng="en"><![CDATA[electrocatalytic]]></kwd>
<kwd lng="en"><![CDATA[hydrogen gas]]></kwd>
<kwd lng="es"><![CDATA[cobalto]]></kwd>
<kwd lng="es"><![CDATA[formamidinato]]></kwd>
<kwd lng="es"><![CDATA[electrocatalítico]]></kwd>
<kwd lng="es"><![CDATA[gas hidrógeno]]></kwd>
</kwd-group>
</article-meta>
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<issue>0</issue>
<page-range>3729-41</page-range></nlm-citation>
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