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The synthesis, spectroscopic properties and electrochemistry of (8-quinolinolato)-bis-{1-alkyl-2- (arylazoimidazole)}ruthenium(ii) hexafluorophosphate: single crystal X-ray structure of [ru(q)(meaaime) 2 ](PF 6 )·CH 2 Cl 2 [Q = 8-quinolinolate, meaaime = 1-methyl-2-( p -tolylazoimidazole)]

2004; Taylor & Francis; Volume: 57; Issue: 1 Linguagem: Inglês

10.1080/00958970410001662426

1029-0389

Sk. Jasimuddin, Prithwiraj Byabartta, Golam Mostafa, Jian-Cheng Liou, T.-H. Lu, Chittaranjan Sinha,

Click Chemistry and Applications

Abstract The reaction of [Ru(OH2)2(RaaiR′)2]2+ [RaaiR′ = 1-alkyl-2-(arylazo)imidazole, p-R–C6H4–N=N–C3H2–NN(1)–R′, R=H (1), Me (2), Cl (3); R′ = Me (a), Et (b), CH2Ph (c)] with 8-quinolinol (HQ) in acetone solution followed by the addition of NH4PF6 afforded violet, mixed ligand complexes of composition [Ru(Q)(RaaiR′)2](PF6). The structure of [Ru(Q)(MeaaiMe)2](PF6) (2a) has been confirmed by X-ray diffraction studies. Solution electronic spectra exhibit a strong MLCT band at 560–580 nm in MeCN. Cyclic voltammogrames show a Ru(III)/Ru(II) couple at 1.0–1.1 V versus SCE along with three successive ligand reductions. The electronic properties are correlated with EHMO results. Keywords: Ruthenium(II)1-Alkyl-2-(arylazo)imidazole8-QuinolinolX-ray structureElectrochemistry Acknowledgments Financial assistance from the Council of Scientific and Industrial Research (CSIR), and DSA phase-II, UGC, New Delhi, is gratefully acknowledged. One of us (SJ) is thankful to CSIR for a fellowship. THL and GM thank the National Science Council, ROC, for support. Supplementary Data Supplementary data are available from the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ. UK [Fax: (internet) +44-1223/336-033; E-mail: deposit@ccdc.cam.ac.uk] on request. The deposition number is 221832. These data can be obtained free of charge at www.ccdc.cam.ac.uk/conts/retrieving.html.