SRX Chemistry

SRX Chemistry / 2010 / Article

Research Article | Open Access

Volume 2010 |Article ID 424392 | 6 pages | https://doi.org/10.3814/2010/424392

Gold-dppm-Arylazoimidazole Complexes: Synthesis, Spectra, and Redox Study

Received31 Jul 2009
Accepted23 Sep 2009
Published22 Dec 2009

Abstract

[Ag(tht)(OTf)]-assisted reaction produces [AuIII(dppm)(tht)2](OSO2CF3)2, reacts with RaaiR in dichloromethane medium followed by ligand addition, and leads to [AuIII(dppm)(RaaiR)](OTf)2(RaaiR=p–R–C6H4–N=N–C3H2–NN–1–R, (1–3), abbreviated as N,N-chelator, where N(imidazole) and N(azo) represent N and N, resp.; R = H (a), Me (b), Cl (c) and R= Me (1), CH2CH3(2), CH2Ph (3), dppm is diphenylphosphinomethane, OSO2CF3 is the triflate anion, and tht is tetrahydrothiophen). Ir spectra of the complexes show –C=N– and –N=N– stretching near at 1590 and 1370 cm1 and near at 1100, 755, 695, 545, and 505 cm1 due to the presence of dppm. The H1 NMR spectral measurements suggest that methylene, –CH2–, in RaaiEt gives a complex AB type multiplet while in RaaiCH2Ph it shows AB type quartets. Electrochemistry assigns ligand reduction.

References

  1. C. M. Che, H. L. Kwong, W. W. Yam, T. F. Lai, and C. M. Che, “A novel series of gold(III)-bis-triphenylphosphine-arylazoimidazole complexes: synthesis and spectroscopic and redox study,” Journal of the Chemical Society, Dalton Transactions, p. 3747, 1990. View at: Google Scholar
  2. H. Schmidbaur, Ed., Gold: Progress in Chemistry, Biochemistry and Technology, H. Schmidbaur, Ed., John Wiley & Sons, Chichester, UK, 1999.
  3. A. J. Lewis, J. Cottney, D. D. White et al., “Action of gold salts in some inflammatory and immunological models,” Agents and Actions, vol. 10, no. 1-2, pp. 63–77, 1980. View at: Publisher Site | Google Scholar
  4. C. K. Mirabelli, C.-M. Sung, J. P. Zimmerman, D. T. Hill, S. Mong, and S. T. Crooke, “Interactions of gold coordination complexes with DNA,” Biochemical Pharmacology, vol. 35, no. 9, pp. 1427–1433, 1986. View at: Publisher Site | Google Scholar
  5. C. K. Mirabelli, R. K. Johnson, C. M. Sung, L. Faucette, K. Muirhead, and S. T. Crooke, “Evaluation of the in vivo antitumor activity and in vitro cytotoxic properties of auranofin, a coordinated gold compound, in murine tumor models,” Cancer Research, vol. 45, no. 1, pp. 32–39, 1985. View at: Google Scholar
  6. P. Byabartta, “A novel series of sulphur-bridged ruthenium-molybdenum complexes: [(RaaiR)2Ru(μ-S)2Mo(OH)2]. Synthesis, spectroscopic and electrochemical characterization. RaaiR=1-alkyl-2-(arylazo) imidazole,” Transition Metal Chemistry, vol. 30, no. 5, pp. 575–581, 2005. View at: Publisher Site | Google Scholar
  7. P. Byabartta, “Synthesis, spectra and electrochemistry of dinitro-bis-{1-alkyl-2-(arylazo) imidazole} ruthenium(II). Nitro-nitroso derivatives and reactivity of the electrophilic {Ru-NO}6system,” Transition Metal Chemistry, vol. 30, no. 7, pp. 804–813, 2005. View at: Publisher Site | Google Scholar

Copyright © 2010 Prithwiraj Byabartta. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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