Synthesis and characterization of trans-[Ru(dmazpy)₂Cl₂]
การสังเคราะห์และยืนยันโครงสร้างของสารประกอบเชิงซ้อน [Ru(dmazpy)₂Cl₂]

Kanidtha Hansongnern, D. of Chemistry, F. of Sci., PSU.
Paul A. Keller, D. of Chemistry, F. of Sci., U. of Wollongong, Australia
Nararak Leesakul, Graduate Student, D. of Chemistry, F. of Sci., PSU.
Corresponding e-mail : hkanidth@ratree.psu.ac.th

Grant : TRF, Postgraduate Education and Research Program in Chemistry
Presented : The 26th Congress on Science and Technology of Thailand, 18-20 October 2000, Bangkok
Key words : ruthenium complex, 2-(4'-N,N-dimethylaminophenylazo)pyridine

2-(4'-N,N-dimethylaminophynylazo)pyridine (dmazpy) is a chelating ligand containing the azoimine group (N=N-C=N). It is also the derivative of 2-(phenylazo)pyridine (azpy). The complex of trans-[Ru(dmazpy)₂Cl₂] was synthesized by interaction between Ru(dmso)₄Cl₂ (dmso = N,N'-dimethyl sulfoxide) with dmazpy ligand in chloroform as a solvent. The complex was purified by chromatography. ES-MS, IR and Visible spectral data have been employed to characterize the com-plex. The complex exhibits t₂Ru(II) ฎ p*(L) MLCT transition in the visible region at lower energy than that of Ru(azpy)₂Cl₂. This could be the result of the substituent N,N-dimethyl group which shifted the p* orbital of dmazpy shift to lower energy than that in azpy.

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