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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 25, Number 7
BKCSDE 25(7)
July 20, 2004 

Synthesis and Magnetic Relaxation of [Mn12O12(O2CCH2CH2CH2Cl)16(H2O)4] Complex
WonSuk Jeon, Mi Kyung Jin, YooJin Kim, Duk-Young Jung*, Byoung Jin Suh, Seokwon Yoon
Single-molecule magnets, Manganese, Magnetic relaxation, Chlorobutyric acid
Mn12O12(O2CCH2CH2CH2Cl)16(H2O)4] (noted as Mn12-BuCl), a new polynuclear complex of manganese chlorobutyrate has been successfully prepared by substitution of acetate with 4-chlorobutyric acid. The Mn12-BuCl crystallizes into triclinic space group P-1 with a = 14.5560(11) A, b = 14.5819(11) A, c = 27.265(2) A, α = 84.1140(10)°, β = 88.805(2)°, γ = 89.8820(10)°, and Z = 2. The local environments of manganese 3+ and 4+ ions of the title compound are close to those of other Mn12 compounds. The electrochemical data for Mn12-BuCl involve reversible reactions of two-electron reductions. The Mn12-BuCl also presents magnetic relaxation below 10 K implying that each molecule behaves as a single molecule magnet.
1036 - 1040
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