Barbosa, Sandro L.Hurtado, Gabriela R.Klein, Stanlei Ivair [UNESP]Junior, Valdemar L.Dabdoub, Miguel J.Guimaraes, Carlos F.2014-05-202014-05-202008-04-01Applied Catalysis A-general. Amsterdam: Elsevier B.V., v. 338, n. 1-2, p. 9-13, 2008.0926-860Xhttp://hdl.handle.net/11449/40973Alcohols and acids can be switched to produce ethers or esters by varying the alcohol to catalyst mol ratio, in a new etherification and esterification method using NbCl5/Al2O3 catalyst under "solvent free" conditions and promoted by MW (microwave) irradiation. A "two sites" mechanism for the reaction is proposed, in an attempt to clarify the tendency of the catalyst to be dependent on the alcohol alone during the esterification process. (c) 2008 Elsevier B.V. All rights reserved.engesterificationetherificationsolid phase catalysismicrowavesolvent freeArtigo10.1016/j.apcata.2007.12.013WOS:000254905200002Acesso restrito2545904877423127