Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Synthesis and Magnetic Relaxation of [Mn12O12(O2CCH2CH2CH2Cl)16(H2O)4] Complex

  • Jeon, Won-Suk (Department of Chemistry-BK21 and the Institute of Basic Science, Sungkyunkwan University) ;
  • Jin, Mi-Kyung (Department of Chemistry-BK21 and the Institute of Basic Science, Sungkyunkwan University) ;
  • Kim, Yoo-Jin (Department of Chemistry-BK21 and the Institute of Basic Science, Sungkyunkwan University) ;
  • Jung, Duk-Young (Department of Chemistry-BK21 and the Institute of Basic Science, Sungkyunkwan University) ;
  • Suh, Byoung-Jin (Department of Physics, The Catholic University of Korea) ;
  • Yoon, Seok-Won (Department of Physics, The Catholic University of Korea)
  • Published : 2004.07.20
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Abstract

$Mn_{12}O_{12}(O_2CCH_2CH_2CH_2Cl)_{16}(H_2O)_4]$ (noted as $Mn_{12}$-BuCl), a new polynuclear complex of manganese chlorobutyrate has been successfully prepared by substitution of acetate with 4-chlorobutyric acid. The $Mn_{12}-BuCl$ crystallizes into triclinic space group P-1 with a = 14.5560(11) ${\AA}$, b = 14.5819(11) TEX>${\AA}$, c = 27.265(2) ${\AA}$, ${\alpha}\;=\;84.1140(10)^{\circ}\;,\;{\beta}\;=\;88.805(2)^{\circ},\;{\gamma}\;=\;89.8820(10)^{\circ}$, and Z = 2. The local environments of manganese 3+ and 4+ ions of the title compound are close to those of other $Mn_{12}$ compounds. The electrochemical data for $Mn_{12}-BuCl$ involve reversible reactions of two-electron reductions. The $Mn_{12}-BuCl$ also presents magnetic relaxation below 10 K implying that each molecule behaves as a single molecule magnet.

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