1. INCT-Catálise, Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina 88040-900, Brazil, Universidade Federal de São João Del-Rei, Sao Joao Del Rei, MG, 36301-160, Brazil, ThoMSon Mass Spectrometry Laboratory, Institute of Chemistry, University of Campinas-UNICAMP, Campinas, SP, Brazil 88040-900, and University Chemical Laboratory, Cambridge CB2 1EW, U.K.