Application of Hydrazine Hydrate in the Synthesis of Octaaminophenylsilsesquioxane OAPS PossReportar como inadecuado




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Octaaminophenylsilsesquioxane OAPS was prepared from octaphenyl silsesquioxane OPS in two steps, first nitration to obtain Octanitrophenylsilsesquioxane ONPS then reduction by using the stable, inexpensive, and readily available hydrazine hydrate as the reducing agent in the presence of IronIIIChloride catalyst with a yield of around 87%. Hydrazine is a two-electron reducing agent whereas nitro group is a four-electron reduction process. The activated carbon serves as an adsorbent and electrical conductor enabling the reaction to occur by acting as a mediator between a two-electron reagent and a four-electron process. Adsorption provides a reducing potential and a supply of electrons from many hydrazines making possible the initial four-electron process even though each individual hydrazine is a two-electron donor. The product was characterized by FTIR and 1H NMR. The time period for preparation of ONPS from octaphenyl silsesquioxane was considerably shortened to avoid double nitration of the aromatic rings.



KEYWORDS

Octaaminophenylsilsesquioxane; Octanitrophenylsilsesquioxane; Hydrazine; Nanocomposite; IronIIIChloride; Reduction

Cite this paper

J. Koech, Q. Shao, F. Mutua and Y. Wang -Application of Hydrazine Hydrate in the Synthesis of Octaaminophenylsilsesquioxane OAPS Poss,- Advances in Chemical Engineering and Science, Vol. 3 No. 1, 2013, pp. 93-97. doi: 10.4236-aces.2013.31011.





Autor: Jacob Kiptanui Koech, Qun Shao, Fredrick Nzioka Mutua, Yimin Wang

Fuente: http://www.scirp.org/



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