Heterometallic hexanuclear cluster with an S=8 spin ground state: Mn-II{Mn-II(hfac)(2)}(3){Ni-II(pao)(3)}(2) (hfac(-) = hexafluoroacetylacetonate, pao(-) = pyridine-2-aldoximate)

Miyasaka H; Nezu T; Iwahori F; Furukawa S; Sugimoto K; Clerac R; Sugiura K; Yamashita M

Inorganic Chemistry, Vol.42, No.15, 4501-4503, 2003

Miyasaka H, Nezu T, Iwahori F, Furukawa S, Sugimoto K, Clerac R, Sugiura K, Yamashita M

The heterometallic (Mn4Ni2II)-Ni-II title compound has been synthesized and characterized by X-ray crystallography. The compound consists of a Ni-Mn-Ni linear moiety, [{Ni-(mu-NO)(3)}(2)-Mn], linked by oximate bridges and three Mn(11) hfac terminal units attached by oximate oxygens in a di-mu-oxo fashion, forming a novel heterometallic cluster. Mn{Mn(hfac)(2)}(3){Ni(pao)(3)}(2) (1). Magnetic measurements reveal the antiferromagnetic nature of the oximate pathway between Mn(11) and Ni(II) metal ions, which imposes an unusual high-spin ground state (S = 8) for 1.