Redox-active ligands are of interest for their ability to link metal centres and generate electroactive materials. We report the synthesis of 9-hydrogen-2,3,7-trihydroxyfluorone, which is able to serve as a bridging ligand and has the potential to exist in multiple oxidation states. Anionic [4+4] metallocycles in which Mo or W centres are linked by the trianion of this ligand are also described.

中文翻译：

---

一种新的基于氟酮的桥连配体，用于分立和聚合物组件，包括基于Mo和W的[4 + 4]金属环

氧化还原活性配体因其连接金属中心和生成电活性材料的能力而受到关注。我们报告了9-氢-2,3,7-三羟基芴的合成，它能够作为桥联配体，并具有以多种氧化态存在的潜力。还描述了其中Mo或W中心通过该配体的三阴离子连接的阴离子[4 + 4]金属环。