Cis-trans isomerization in the syntheses of ruthenium cyclam complexes with nitric oxide

Author(s)

Vidal, Robson da Silva ^[1] ; Doro, Fabio Gorzoni ^{[1, 2]} ; Ferreira, Kleber Queiroz ^{[1, 2]} ; da Rocha, Zenis Novais ^[2] ; Castellano, Eduardo Ernesto ^[3] ; Nikolaou, Sofia ^[4] ; Tfouni, Elia ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Quim, Fac Filosofia Ciencias & Letras Ribeirao Preto, BR-14040901 Ribeirao Preto, SP - Brazil

^[2] Univ Fed Bahia, Inst Quim, BR-40170290 Salvador, BA - Brazil

^[3] Univ Sao Paulo, Dept Fis & Informat, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil

^[4] Univ Sao Paulo, Dept Fis & Quim, Fac Ciencias Farmaceut Ribeirao Preto, BR-14040903 Ribeirao Preto, SP - Brazil

• Document type: Journal article
• Source: Inorganic Chemistry Communications; v. 15, p. 93-96, JAN 2012.
• Web of Science Citations: 1

Abstract

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 (176.75 degrees) and v( 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)center dot 2 H2O is also reported. Results presented here support the cis-trans isomerization observed for the first time with ruthenium cyclam complexes. (C) 2011 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 06/53266-4 - Chemistry, photochemistry and biological applications of ruthenium complexes with nitric oxide and related species. From solution to materials
• Grantee: Elia Tfouni
• Support Opportunities: Research Projects - Thematic Grants