Synthesis, Reactivity, X-ray Crystal Structures and Electrochemical Behaviour of Water-Soluble [Tris(pyrazolyl)borato]ruthenium(II) Complexes of 1,3,5-Triaza-7-phosphaadamantane (PTA)

✍ Scribed by Sandra Bolaño; Jorge Bravo; Jesus Castro; M. Mar Rodríguez-Rocha; M. Fátima C. Guedes da Silva; Armando J. L. Pombeiro; Luca Gonsalvi; Maurizio Peruzzini

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 659 KB
• Volume: 2007
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200700672

✦ Synopsis

Abstract

A series of chloridoruthenium(II) complexes bearing the tripodal ligand tris(pyrazolyl)borate (Tp), the water‐soluble cage phosphane 1,3,5‐triaza‐7‐phosphaadamantane (PTA) and its N‐boranyl adduct PTA(BH~3~), together with PPh~3~, have been synthesised. The corresponding monohydrido complexes have also been obtained by treating the chlorides withNaOMe. The X‐ray crystal structures of [TpRuCl(PTA)(PPh~3~)] (2) and [TpRuCl(PTA)~2~] (3) are also described. Cyclic voltammetry (CV) studies in MeCN and dmso generally show reversible Ru^II/III^ oxidation waves and the values of E~1/2~^ox^ reflect the electron‐donating character of the ligands [Tp (each arm) > PTA > PTA(BH~3~)], whose Lever electrochemical parameter (E~L~) has been estimated for the first time.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)