Synthesis, Structure, and Magnetic Properties of Tetranuclear Cubane-like and Chain-like Iron(II) Complexes Based on the N<sub>4</sub>O Pentadentate Dinucleating Ligand 1,5-Bis[(2-pyridylmethyl)amino]pentan-3-ol
作者:Juan M. Clemente-Juan、Christine Mackiewicz、Marc Verelst、Françoise Dahan、Azzedine Bousseksou、Yiannis Sanakis、Jean-Pierre Tuchagues
DOI:10.1021/ic010787+
日期:2002.3.1
bridging ligands (4): they are the first examples of cyanato and azido bridged discrete polynuclear ferrous compounds, respectively. The Mössbauer spectra of 1 are consistent with four different high-spin iron(II) sites in the Fe(4)O(4) cubane-type structure. The Mössbauer spectra of 3 are consistent with two high-spin iron(II) sites (N(5)O and N(4)O). Below 190 K, the Mössbauer spectra of 4 are consistent
Synthesis, Structure, and Magnetic Properties of the Low-Symmetry Tetranuclear Cubane-like Nickel Complex [Ni<sub>4</sub>(pypentO)(pym)(μ<sub>3</sub>-OH)<sub>2</sub>(μ-Oac)<sub>2</sub>(NCS)<sub>2</sub>(OH<sub>2</sub>)]
作者:Juan M. Clemente-Juan、Benoît Chansou、Bruno Donnadieu、Jean-Pierre Tuchagues
DOI:10.1021/ic0005442
日期:2000.11.1
and J3 superexchange interactions is in good agreement with the different types of faces present in this Ni4O4 cubane core. The two faces of the cube, including two mu 3-OR bridges associated with one acetate bridge, exhibit ferromagnetic interactions, while the four faces which include only mu 3-OR bridges exhibit antiferromagneticinteractions. The very small zerofieldsplitting may be attributed to