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Ruthenium Complexes of the Scorpionate Ligand Bis(3,5-dimethylpyrazol-1-yl)dithioacetate and the Effect of Nitric Oxide Coordination

✍ Scribed by Mayreli Ortiz; Ariadna Penabad; Alicia Díaz; Roberto Cao; Antonio Otero; Antonio Antiñolo; Agustín Lara

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
125 KB
Volume
2005
Category
Article
ISSN
1434-1948

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✦ Synopsis

Abstract

Six new ruthenium(II) complexes with the scorpionateligand bis(3,5‐dimethylpyrazol‐1‐yl)dithio‐κ^3^N,N,S‐acetate (bdmpzdta) were obtained by treatment of the ligand with RuCl~3~ or [RuCl~3~(NO)] in 1:1 or 2:1 molar ratios in the presence or absence of ethylenediamine. In all six complexes the pyrazolic rings lie in the equatorial plane. The mononitrosyl complexes present a sharp ν(NO) band in the range 1864–1859 cm^–1^ for samples prepared either as KBr tablets or dichloromethane solutions. In the case of [Ru(NO)(bdmpzdta)~2~]Cl (7), the dithiocarboxylate group of one of the ligands is not coordinated (κ^2^N,N). In the other five complexes, however, bdmpzdta behaves as a κ^3^N,N,S scorpionate ligand. When the complexes obtained from RuCl~3~ were dissolved in dichloromethane and NO was bubbled through the solution, a high degree of coordination of NO^+^ was observed, according to IR, UV and voltammetric studies. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)

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