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Papers by Kleber Ferreira

Research paper thumbnail of Solvent dependent conformational isomerism and ligand oxidation of novel Ru (II) cyclen complexes

Research paper thumbnail of Cis–trans isomerization in the syntheses of ruthenium cyclam complexes with nitric oxide

Inorganic Chemistry Communications, 2012

The cis to trans isomerizations during the syntheses of trans-[Ru(NO)(OH)(cyclam)](PF 6 ) 2 , fro... more The cis to trans isomerizations during the syntheses of trans-[Ru(NO)(OH)(cyclam)](PF 6 ) 2 , from cis-[RuCl 2 (cyclam)]Cl, and [Ru(NO)Cl(cyclam)] (PF 6 ) 2 , from cis-[RuCl 2 (dmso) 4 ], are reported. The novel trans-[Ru(NO) (OH)(cyclam)](PF 6 ) 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)] (ClO 4 ) 2 ·2 H 2 O is also reported. Results presented here support the cis-trans isomerization observed for the first time with ruthenium cyclam complexes.

Research paper thumbnail of Solvent dependent conformational isomerism and ligand oxidation of novel Ru (II) cyclen complexes

Research paper thumbnail of Cis–trans isomerization in the syntheses of ruthenium cyclam complexes with nitric oxide

Inorganic Chemistry Communications, 2012

The cis to trans isomerizations during the syntheses of trans-[Ru(NO)(OH)(cyclam)](PF 6 ) 2 , fro... more The cis to trans isomerizations during the syntheses of trans-[Ru(NO)(OH)(cyclam)](PF 6 ) 2 , from cis-[RuCl 2 (cyclam)]Cl, and [Ru(NO)Cl(cyclam)] (PF 6 ) 2 , from cis-[RuCl 2 (dmso) 4 ], are reported. The novel trans-[Ru(NO) (OH)(cyclam)](PF 6 ) 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)] (ClO 4 ) 2 ·2 H 2 O is also reported. Results presented here support the cis-trans isomerization observed for the first time with ruthenium cyclam complexes.

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