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Ru(0)-azoimine-carbonyl and Ru(II)-pyridyl-azo-imidazole complexes by T. Mathur; J. Dinda; P. Datta; G. Mostafa; T.-H. Lu; C. Sinha is a Chemistry article available to read on EtoBox.

What is Ru(0)-azoimine-carbonyl and Ru(II)-pyridyl-azo-imidazole complexes about?

The reaction of 2-(3 0 -pyridylazo)imidazole (3 0 -PyaiH) or its 1-alkyl derivative, 3 0 -PyaiR, with Ru(CO) 3 (PPh 3 ) 2 has synthesized air stable, moisture insensitive, diamagnetic Ru(0) complexes, [Ru(CO)(3 0 -PyaiR)(PPh 3 ) 2 ]. The ligands serve as an unsymmetric N,N 0 -chelating agent (N(imidazole) and N(azo) are abbreviated as N and N 0 , respectively). The X-ray structure determination of [Ru(CO)-(3 0 -PyaiH)(PPh 3 ) 2 ] shows a square pyramidal geometry. The square plane is made up of Ru, 2P, C(O), N(1), and with N(3) at the apex. Other spectroscopic studies (IR, UV-Vis, NMR) support the stereochemistry. Electrochemistry shows three consecutive anodic peaks (E pa ) and suggest irreversible redox responses of Ru(I)/Ru(0), Ru(II)/Ru(I), Ru(III)/Ru(II) and azo reductions. Oxidation by Cl 2 of [Ru(CO)(3 0 -PyaiR)(PPh 3 ) 2 ] has isolated the Ru(II)-complex as the perchlorate salt, [Ru(CO)(Cl)(3 0 -PyaiR)(PPh 3 ) 2 ](ClO 4 ). A solution of RuCl 3 and 3 0 -PyaiR in ethanol has isolated two isomers of the composition Ru(3 0 -PyaiR) 2 Cl 2 . They have been characterized by spectral and electrochemical data.

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Author

T. Mathur; J. Dinda; P. Datta; G. Mostafa; T.-H. Lu; C. Sinha

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0277-5387)

Published

2006

Language

EN

Field

Chemistry (Physical Sciences)