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Type: Artigo de periódico
Title: Reactivity Of Trans[ru(nh3)4p(oet) 3no]x3(x = Pf6 -, Cf 3coo-) : Mmmmodulation Of The Release Of No By The Trans-effect
Author: Lopes L.G.F.
Castellano E.E.
Ferreira A.G.
Davanzo C.U.
Clarke M.J.
Franco D.W.
Abstract: The synthesis, characterization and reactivity of trans-[Ru(NH3)4P(OEt)3NO] X3(X=PF6-andCF3COO-) are presented. The X-ray structure of trans-[Ru(NH 3)4P(OEt)3NO](CF3COO)3 • 3CF3COOH indicates coordination of the nitrosyl as NO . with a Ru-N-O angle of 175.1(8)° and a Ru-NO bond length of 1.774(8) Å. Loss of NO2- from trans-[Ru(NH3) 4P(OEt)3NO]3+ is pH dependent with k obs (s-1) = (k0Ka + k 1[H+])/([H+] + Ka)], where k 0 = 2 × 10-5 s-1, k1 = 0.40 ± 0.03 s-1, and pKa = 8.6 ± 0.3. The nitrosyl complex undergoes a one-electron reduction (E0 = 0.14 V versus NHE) involving the coordinated nitrosyl group followed by dissociation of NO, which is facilitated by the phosphito ligand (k-NO = 0.97 s -1 at 25 °C and pH 5.0). © 2004 Published by Elsevier B.V.
Citation: Inorganica Chimica Acta. , v. 358, n. 10, p. 2883 - 2890, 2005.
Rights: fechado
Identifier DOI: 10.1016/j.ica.2004.07.014
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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