Magnetization dynamics of a heterometallic Dy-isocarbonyl complex

Abstract

The reaction of Dy(N(Si(CH₃)₃)₂)₃ with three equivalents of HW(CO)₃Cp (Cp = cyclopentadienyl) furnished the first structurally characterized isocarbonyl complex of Dy³⁺, [{CpW(CO)₂(μ-CO)}₃Dy(thf)₅] (1). Solid dilution via cocrystallization with the isostrucutral Y³⁺ analogue of 1 allowed for the observation of temperature dependent signals in the out-of-phase component of the ac magnetic susceptibility in the presence of an applied dc field. An effective barrier to magnetization reversal of 12.6 cm⁻¹ could be extracted for compound 1 under these conditions.