Volume : 4, Issue : 3, March - 2015

Friedel-Craft's Acylation of Deactivated Benzenes over Solid Acid Catalysts

Nishamol Kanat, Chandana Basu

Abstract :

<p>&lt;p&gt;&amp;nbsp;The cobalt manganese ferrospinels with the general formula CoxMn(1&amp;ndash;x)Fe2O4(x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0 has been&amp;nbsp;&lt;/p&gt; &lt;div&gt;successfully synthesized by controlled low temperature hydroxide co&amp;ndash;precipitation method. The cobalt manganese&amp;nbsp;&lt;/div&gt; &lt;div&gt;ferrospinels exhibit a well defined crystalline structure with high surface area. The physicochemical properties of the&amp;nbsp;&lt;/div&gt; &lt;div&gt;ferrospinels are characterized by X&amp;ndash;ray diffraction, Inductively coupled plasma analysis and surface area determination by BET method. The&amp;nbsp;&lt;/div&gt; &lt;div&gt;stoichiometry of the samples was in good agreement with the theoretical values. The surface acidity of the systems was determined by NH3&amp;ndash;&lt;/div&gt; &lt;div&gt;TPD method. The addition of cobalt ions into the pure manganese ferrospinels enhances the acidity in the weak and medium regions. These&amp;nbsp;&lt;/div&gt; &lt;div&gt;ferrospinel systems were found to be active for the liquid phase Friedel&amp;ndash;Craft&amp;rsquo;s acylation of deactivated benzenes with benzoyl chloride giving&amp;nbsp;&lt;/div&gt; &lt;div&gt;corresponding ketones. Acidity of the catalysts in the weak and medium regions is mainly responsible for the good catalytic performance .&lt;/div&gt;</p>