Journal of the Brazilian Chemical Society, Volume: 16, Issue: 6b, Pages: 1406-1409, Published: NOV 2005 Journal of the Brazilian Chemical Society v.16 n.6b 2005 Journal of the Brazilian Chemical Society Sociedade Brasileira de Química (SBQ) instacron:SBQ Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP