Crystal structure and magnetic behavior of decamethylferrocenium bis(2-thioxo-1,3-dithiole-4,5-diselenolato)nickelate(III)
摘要:
The synthesis, crystal structure and magnetic properties of the charge transfer salt [Fe(Cp*)(2)][Ni(dSit)(2)], dsit = (2-thioxo-1,3-dithiole-4,5-diselenolato) are described. The crystal structure consists of layers composed by parallel chains, where side-by-side pairs of cations, alternate with face-to-face pairs of anions, . . . D(+)D(+)A(-)A(-)D(+)D(+)A(-)A(-). . . The acceptors in the AA pairs are strongly dimerized through a Ni-Se bond. Short interdimer contacts (Se-Se and S-S) give rise to a porous 3D network, and the [Fe(CP*)(2)](+) pairs are located in the cavities of the acceptors network. The [Fe(Cp*)(2)](+) donors are relatively isolated leading to weak DA and DD interactions and the magnetic behavior of this compound can be basically described as the sum of two contributions: one from nearly independent donors, and the second from the acceptors network, with strong AA AFM coupling, both intradimer and between dimers in adjacent chains. (c) 2007 Elsevier B.V. All rights reserved.