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Synthesis, Structure, and Redox Properties of a New Aqua Ruthenium Complex Containing the Tridentate [9]aneS 3 and the Didentate 1,10‐Phenanthroline Ligands
Author(s) -
Sala Xavier,
Poater Albert,
Romero Isabel,
Rodríguez Montserrat,
Llobet Antoni,
Solans Xavier,
Parella Teodor,
Santos Teresa M.
Publication year - 2004
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200300137
Subject(s) - chemistry , ruthenium , phenanthroline , oxidizing agent , redox , benzyl alcohol , benzaldehyde , octahedron , inorganic chemistry , octahedral molecular geometry , coordination complex , crystallography , nuclear magnetic resonance spectroscopy , metal , medicinal chemistry , stereochemistry , catalysis , organic chemistry , crystal structure
The synthesis of a new Ru−H 2 O complex [Ru(phen)(H 2 O)([9]aneS 3 )](ClO 4 ) 2 , 2 , (phen = 1,10‐phenanthroline, [9]aneS 3 = 1,4,7‐trithiacyclononane) is described. The complex is characterized by UV/Vis and 1‐D and 2‐D NMR spectroscopy in solution. The complex has been further characterized in the solid‐state by X‐ray diffraction analysis which displays a distorted octahedral coordination geometry around the Ru metal center. The cyclic voltammetric experiments of the complex show a pH‐dependent chemically irreversible wave at E p, a = 0.82 V, at pH = 7.0, indicating the low stability of the higher oxidation states. Nevertheless, before the complex decomposes, it is capable of electrocatalytically oxidizing benzyl alcohol (BzOH) to benzaldehyde with a second‐order rate constant of 19.8 M −1 s −1 . (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)