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Synthesis and Characterization of Octamethylenethiafulvalene Compounds with Osmium, Iridium, Platinium and Gold Chloride
Synthesis and Characterization of Octamethylenethiafulvalene Compounds with Osmium, Iridium, Platinium and Gold Chloride
Journal of the Korean Chemical Society. 2001. Oct, 45(5): 442-447
  • Published : October 00, 2001
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Jeong, Chan Kyou
Lee, Hong Kyou
Kim, Young Jin
Choi, Sung Nak
Kim, Young Inn

Abstract
The charge-transfer compound (OMTTF)AuCl$_4$ was prepared from the direct reaction of octamethylenethiafulvalene (OMTTF) with HAuCl$_4{\cdot}$xH$_2$O in THF. (OMTTF) $_2$PtCl$_4$, (OMTTF) $_2$Ir$Cl_6$${\cdot}$2H$_2$O, and (OMTTF)Os$Cl_5$${\cdot}$THF were also formed using H$_2$Pt$Cl_6$${\cdot}$xH$_2$O, H$_2$Ir$Cl_6$${\cdot}$xH$_2$O and H$_2$Os$Cl_6$, respectively. The prepared compounds were characterized by magnetic (EPR, magnetic susceptibility), spectroscopic (IR, UV-Vis), electrochemical (CV) methods, and the powdered electrical conductivity measurement. The powdered electrical conductivities at room temperature were ~$10^{-7}$ S${\cdot}$$cm^{-1}$. The experimental results show that $OMTTF^+$ monocation radicals exist in all of the prepared compounds. The redox potential of OMTTF supports that $OMTTF^+$ is relatively stable. The magnetic properties indicate that there are significant magnetic interactions between the localized odd electrons on the central metal (Ir and Os) ions and the odd electrons resided on $OMTTF^+$ cation radicals in both (OMTTF) $_2$Ir$Cl_6$${\cdot}$2H$_2$O and (OMTTF)Os$Cl_5$${\cdot}$THF.