Synthesis, characterization and structure of the complex: nickel hexakis (imidazole) bis(trifluoromethanesulfonate) - Souza, H K S; Araújo Melo, D M; Silva, Z R; Alves, W A; Zinner, Lea Barbieri; Vicentini, Geraldo; Zukerman-Schpector, Júlio (Anais da ABQ, 2000)