Abstract
Iron(III) supported on nano silica as a new catalyst has been synthesized. Structural properties of this complex have been studied by TEM, SEM and EDX. The average crystalline size of Iron(III) supported on nano silica is 30–50 nm. Catalytic activity of this catalyst has been investigated by synthesis of benzimidazoles from 1, 2-diaminobenzene and aromatic aldehydes, and also the other variables investigated such as the amount of catalyst, reaction temperature and the effect of various solvents are also studied. The present procedure offers several advantages such as short reaction time, simple workup, recovery and reusability of the catalyst.
Highlights
Solid-supported reagents are completely acid catalysts that have become known over the last decades
The average crystalline size of Iron(III) supported on nano silica is 30–50 nm. Catalytic activity of this catalyst has been investigated by synthesis of benzimidazoles from 1, 2-diaminobenzene and aromatic aldehydes, and the other variables investigated such as the amount of catalyst, reaction temperature and the effect of various solvents are studied
Methods of synthesis benzimidazole include the reaction between o-aryldiamines and aldehyde in refluxing nitrobenzene [17, 20], the condensation of o-aryldiamines with carboxylic acids or their derivatives in the presence of robust acids such as polyphosphoric acid [14] or inorganic acids [8]
Summary
Solid-supported reagents are completely acid catalysts that have become known over the last decades. Abstract Iron(III) supported on nano silica as a new catalyst has been synthesized. The average crystalline size of Iron(III) supported on nano silica is 30–50 nm.
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