Journal of the Brazilian Chemical Society v.12 n.5 2001 Journal of the Brazilian Chemical Society Sociedade Brasileira de Química (SBQ) instacron:SBQ Journal of the Brazilian Chemical Society, Volume: 12, Issue: 5, Pages: 571-585, Published: OCT 2001 Journal of the Brazilian Chemical Society, Vol 12, Iss 5, Pp 571-585 (2001)