Carbon monoxide releasing molecules (CO-RMs) are a newly emerging class of compounds of pharmacological interest. Among the transition metal-based CO-RMs, 17-electron complexes of general formula cis-trans-[ReII(CO)2Br2L2] are promising candidates but their poor hydrophilicity hampers future applications. In an effort to increase water solubility of d5 dicarbonyl rhenium CO-RMs, the reaction of the cis-[ReII(CO)2Br4]2â anion with bridging aromatic ligands of the pyridine and diazine type was investigated. Mononuclear and binuclear complexes are presented and it is shown that the nature of the bridging ligand critically dictates the formation of either species. Most complexes retained their fundamental CO-releasing properties. The synthesis of the molecules together with structural, spectroscopic and theoretical details are discussed.
一氧化碳释放分子(CO-RMs)是一类新兴的药理化合物。在过渡
金属基 CO-RMs 中,通式为顺反-[ReII(CO)2Br2
L2]的 17 电子配合物是很有前途的候选化合物,但它们亲
水性差,阻碍了未来的应用。为了提高 d5 二羰基
铼 CO-RMs 的
水溶性,我们研究了顺式-[ReII(CO)2Br4]2â 阴离子与
吡啶和重氮类型的桥接芳香
配体的反应。研究提出了单核和双核络合物,结果表明桥接
配体的性质在很大程度上决定了两种络合物的形成。大多数络合物保留了其基本的
一氧化碳释放特性。文中讨论了分子的合成以及结构、光谱和理论细节。