Lampropoulos Christos, Stamatatos Theocharis C, Abboud Khalil A, Christou George
Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA.
Inorg Chem. 2009 Jan 19;48(2):429-31. doi: 10.1021/ic802005a.
An unusual Mn(IV)Gd(III)(2)(mu(3)-O(2-)) triangular complex has been prepared from the initial use of 2,6-diacetylpyridine dioxime (dapdoH(2)) in 3d/4f cluster chemistry. The complex has an S = (13)/(2) ground state, with exchange parameters J = +0.49 cm(-1) and J' = -0.12 cm(-1) [H = -2J(S(i) x S(j)) convention] for the Gd(III)...Mn(IV) and Gd(III)...Gd(III) interactions, respectively. The origin of this ground state has been rationalized by consideration of the spin frustration occurring within the complex as a function of the relative magnitude of the competing interactions.
通过在3d/4f簇化学中首次使用2,6 - 二乙酰吡啶二肟（dapdoH₂）制备了一种不寻常的Mn(IV)Gd(III)₂(μ₃ - O²⁻)三角配合物。该配合物具有S = 13/2基态，对于Gd(III)…Mn(IV)和Gd(III)…Gd(III)相互作用，交换参数J = +0.49 cm⁻¹和J' = -0.12 cm⁻¹ [采用H = -2J(Sᵢ×Sⱼ)惯例]。通过考虑配合物中作为竞争相互作用相对大小函数的自旋阻挫，对该基态的起源进行了合理化解释。
