Artigo de Periódico
Cis–trans isomerization in the syntheses of ruthenium cyclam complexes with nitric oxide
Fecha
2012Autor
Vidal, Robson da Silva
Doro, Fabio Gorzoni
Ferreira, Kleber Queiroz
Rocha, Zênis Novais da
Castellano, Eduardo Ernesto
Nikolaou, Sofia
Tfouni, Elia
Vidal, Robson da Silva
Doro, Fabio Gorzoni
Ferreira, Kleber Queiroz
Rocha, Zênis Novais da
Castellano, Eduardo Ernesto
Nikolaou, Sofia
Tfouni, Elia
Institución
Resumen
The cis to trans isomerizations during the syntheses of trans-[Ru(NO)(OH)(cyclam)](PF6)2, from cis-[RuCl2(cyclam)]Cl, and [Ru(NO)Cl(cyclam)] (PF6)2, from cis-[RuCl2(dmso)4], are reported. The novel trans-[Ru(NO)(OH)(cyclam)](PF6)2 complex was characterized by X-ray crystallography and vibrational infrared and nuclear magnetic resonance spectroscopies. The Ru–N–O bond angle (176.75º) and ν(NO) (1835 cm− 1) suggest a nitrosonium character for this hydroxo complex. The crystal and molecular structure of trans-[Ru(NO)Cl(cyclam)](ClO4)2·2 H2O is also reported. Results presented here support the cis–trans isomerization observed for the first time with ruthenium cyclam complexes.