Artigo de Periódico
Conformational isomers of cis-chloro(nitrosyl)(1,4,7,10-tetraazacyclododecene)ruthenium(II), cis-[RuIICl(imcyclen)(NOþ)]2þ. Oxidation of the coordinated 1,4,7,10-tetraazacyclododecane (cyclen) ligand
Date
2004Registration in:
1387-7003
v. 7, n. 2
Author
Ferreira, Kleber Queiroz
Santos, Flavia Gouveia
Rocha, Zênis Novais da
Guaratini, Thais
Silva, Roberto Santana da
Tfouni, Elia
Ferreira, Kleber Queiroz
Santos, Flavia Gouveia
Rocha, Zênis Novais da
Guaratini, Thais
Silva, Roberto Santana da
Tfouni, Elia
Institutions
Abstract
The reaction of cis-dichloro(1,4,7,10-tetraazacyclododecane)ruthenium(III), cis-[RuIIICl2(cyclen)]þ, in acidic aqueous solution,in the presence of nitric oxide, results in cis-[RuIICl(imcyclen)(NOþ)]2þ. The cis nitrosyl complex is precipitated as a mixture of two conformational isomers, which are separated by high performance liquid chromatography. Electrochemical, infrared spectroeletrochemistry,
and infrared, UV–Vis, 1H NMR, and EPR spectra results indicate the presence of coordinated nitric oxide in the form
of nitrosonium (NOþ), and that the macrocyclic ligand (cyclen) is in the oxidized form in the complexes.