Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Tetrathiafulvalene (TTF) Charge Transfer Compounds with Some Heavier Transition Metal (Au, Pt, Ir, Os) Chlorides

  • Published : 1996.11.20
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Abstract

The charge transfer compounds of tetrathiafulvalene (TTF) with the general formula of (TTF)mMCln, (M=Au, Pt, Ir, Os) were prepared by the direct reaction using excess HAuCl4·3H2O, H2PtCl6·xH2O, H2IrCl6·xH2O and H2OsCl6 respectively. The powdered electrical conductivities (σrt) at room temperature are given as follows; (TTF)3AuCl2, 4.53×10-3; (TTF)3.5AuCl2, 6.37×10-3; (TTF)3PtCl4, 5.51×10-4; (TTF)2IrCl4, 2.40×10-5; (TTF)OsCl4·1/2C2H5OH, 4.46×10-7 Scm-1. Magnetic susceptibility, electronic (UV-Vis.), vibrational (IR) and EPR spectroscopic evidences indicate that there is incomplete charge transfer from the TTF donor to gold, platinum, and iridium respectively, and that there is essentially complete charge transfer to osmium, thereby resulting a relatively low electrical conductivity in osmium compound. The EPR and magnetic susceptibility data reflect that the metals are in diamagnetic Au(Ⅰ), Pt(Ⅱ), Ir(Ⅲ), and Os(Ⅱ) oxidation states, and the odd electrons are extensively delocalized over the TTF lattices in each compound.

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References

  1. Molecular Metals; NATO Conference Series Hatfield, W. E.
  2. J. Solid State Commun. v.12 Coleman, L. G.;Cohen, M. J.;Sandman, D. J.;Yamagishi, F. G.;Garito, A. F.;Heeger, A. J.
  3. J. Am. Chem. Soc. v.95 Ferraris, J.;Cowan, D. O.;Valatka, V.;perstein, Jr., J. H.
  4. Acc. Chem. Res. v.12 Torrance, J. B.
  5. Inorganica Chimica Acta. v.188 Kim, Y. I.;Hatfield, W. E.
  6. Bull. Korean Chem. Soc. v.15 Kim, Y. I.;Choi, S. N.;Jung, W. S.
  7. Bull. Korean Chem. Soc. v.15 Moon, S. B.;Moon, J. D.
  8. Magnetic Properties of Coordination and Organometallic Transition complexex Konig, E.
  9. J. Chem. Soc., Chem. Commun. Wudl, F.;Smith, G. M.;Hufnagel, E. J.
  10. Helv. Chim. Acta. v.97 Carara, L.;Gerson, F.;Cowan, D. O.;Lerstrup, K.
  11. Bull. Am. Phys. Soc.B v.20 Tomkiewicz, Y.;Engler, E. M.
  12. Phys. Rev. B v.18 Tomkiewicz, Y.;Taranko, A. R.
  13. NATO Advanced Study Institute Series EPR of Organic Conductor; in The Physics and Chemistry of Low Dimensional Solids; by Alcacer Tomkiewicz, Y.
  14. Phys. Rev. Lett. v.53 Mehring, M.;Spengler, J.
  15. Am. Chem. Soc. v.98 Wheland, R. C.;Gillson, J. L.
  16. Chem. Phys. Lett. v.52 Bozio, R.;Gilando, A.;Pecile, C.
  17. Inorg. Chem. v.20 Seidle, A. R.;Candela, T. F.;Finnegan, T. F.;Van Duyne, R. P.;Cape, T.;Kokoszka, G. F.;Woyciejes, P. M.;Hashmall, J. A.
  18. Phys. Rev. B. v.19 Torrance, J. B.;Scott, B. A.;Welber, B.;Kaufman, F. B.;Seiden, P. E.
  19. Inorganica Chimica Acta. v.119 Bonai, R. D. R.;Brian, B. E.;Michael, A. H.