Pintado-Zaldo Cristina, Bureller Louise, de Joz-Latorre Gonzalo, Gómez-García Carlos J, Benmansour Samia
Departamento de Química Inorgánica, Universidad de Valencia, Dr. Moliner 50, 46100 Burjasot, Spain.
Cryst Growth Des. 2025 Mar 24;25(7):2215-2226. doi: 10.1021/acs.cgd.5c00210. eCollection 2025 Apr 2.
Herein, we show how it is possible to prepare a monomer, a dimer, a trimer and a chain with cobalt-(II) and the ligand nitranilato (3,6-dinitro-2,5-dihydroxy-1,4-benzoquinone dianion = CO(NO) = NA) by simply changing the counter-cations. Thus, we show that when we combine the ligand NA with cobalt-(II) in the presence of a bulky cation as PPh , we obtain compound (PPh)[Co-(NA)] (), which contains the first monomeric anion of the type [Co-(L)] (L = any anilato ligand). With a smaller cation as NMe , we obtain (NMe)[Co(NA)(HO)] (), a rare example of anilato-containing dimer based on a transition metal (TM). With a larger cation as NPr , we obtain a trinuclear cobalt-nitranilato complex formulated as (NPr)[Co(NA)(HO)] () and finally, when using the small NH cation, we obtain the neutral chain: [Co-(NA)-(HO)] (). This work presents the synthesis and structure of these compounds and the magnetic characterization of compounds - that show the presence of very weak antiferromagnetic interactions between the cobalt centers through the anilato bridges.
在此，我们展示了如何通过简单地改变抗衡阳离子，用钴（II）和配体硝酰苯胺（3,6 - 二硝基 - 2,5 - 二羟基 - 1,4 - 苯醌二阴离子 = CO(NO) = NA）制备单体、二聚体、三聚体和链状化合物。因此，我们表明，当我们在大体积阳离子如PPh存在下将配体NA与钴（II）结合时，我们得到化合物（PPh）[Co-(NA)] （），它包含第一个[Co-(L)] 型（L = 任何苯胺基配体）的单体阴离子。用较小的阳离子如NMe时，我们得到（NMe）[Co(NA)(HO)] （），这是基于过渡金属（TM）的含苯胺基二聚体的罕见例子。用较大的阳离子如NPr时，我们得到一种三核钴 - 硝酰苯胺配合物，化学式为（NPr）[Co(NA)(HO)] （），最后，当使用小的NH阳离子时，我们得到中性链：[Co-(NA)-(HO)] （）。这项工作展示了这些化合物的合成、结构以及化合物 - 的磁性表征，这些表征表明通过苯胺基桥在钴中心之间存在非常弱的反铁磁相互作用。
