Lescouëzec Rodrigue, Vaissermann Jacqueline, Toma Luminita Marilena, Carrasco Rosa, Lloret Francesc, Julve Miguel
Departament de Química Inorgànica/Instituto de Ciencia Molecular, Facultat de Química de la Universitat de València, Dr. Moliner 50, 46100-Burjassot, València, Spain.
Inorg Chem. 2004 Apr 5;43(7):2234-6. doi: 10.1021/ic030284z.
The novel mononuclear complex PPh(4)-mer-[Fe(III)(bpca)(3)(CN)(3)].H(2)O (1) [PPh(4)(+) = tetraphenylphosphonium cation and bpca = bis(2-pyridylcarbonyl)amidate anion] and ladder-like chain compound [[Fe(III)(bpca)(micro-CN)(3)Mn(II)(H(2)O)(3)] [Fe(III)(bpca)(CN)(3)]].3H(2)O (2) have been prepared and characterized by X-ray diffraction analysis. Compound 1 is a low-spin iron(III) compound with three cyanide ligands in mer arrangement and a tridentate N-donor ligand building a distorted octahedral environment around the iron atom. Compound 2 is an ionic salt made up of cationic ladder-like chains [Fe(III)(bpca)(micro-CN)(3)Mn(II)(H(2)O)(3)] and uncoordinated anions Fe(III)(bpca)(3)(CN)(3). The magnetic properties of 2 correspond to those of a ferrimagnetic chain with significant intrachain antiferromagnetic coupling between the low-spin iron(III) centers and the high-spin manganese(II) cations. This compound exhibits ferrimagnetic ordering below 2.0 K.
新型单核配合物四苯基鏻-三聚-[铁(III)(双(2-吡啶基羰基)氨基甲酸酯)3(氰基)3]·水(1) [四苯基鏻阳离子和双(2-吡啶基羰基)氨基甲酸酯阴离子]以及梯状链状化合物[[铁(III)(双(2-吡啶基羰基)氨基甲酸酯)(μ-氰基)3锰(II)(水)3][铁(III)(双(2-吡啶基羰基)氨基甲酸酯)(氰基)3]]·3水(2)已通过X射线衍射分析制备并表征。化合物1是一种低自旋铁(III)化合物，有三个呈面式排列的氰化物配体和一个三齿氮供体配体，在铁原子周围构建了一个扭曲的八面体环境。化合物2是一种离子盐，由阳离子梯状链[[铁(III)(双(2-吡啶基羰基)氨基甲酸酯)(μ-氰基)3锰(II)(水)3]]⁺和未配位的阴离子[铁(III)(双(2-吡啶基羰基)氨基甲酸酯)3(氰基)3]⁻组成。化合物2的磁性与具有低自旋铁(III)中心和高自旋锰(II)阳离子之间显著链内反铁磁耦合的亚铁磁链的磁性相对应。该化合物在2.0 K以下表现出亚铁磁有序。
