Diphenylphosphine functionalized propionic acid was applied for the synthesis of heteromultimetallic dimolybdenum(ii) complexes. The ligand features both carboxylic acid and phosphine functionalities, allowing the selective synthesis of a tetracarboxylate bridged Mo2(ii)-paddlewheel structure in a first step. Due to the symmetrically arranged phosphine functionalities, the dimolybdenum(ii) complex was utilized as a metalloligand. Subsequent coordination of late transition metal ions, such as gold(i), rhodium(i), iridium(i) or ruthenium(ii) to the phosphine moieties allowed the formation of heteromultimetallic structures. The flexibility of the diphenylphosphino propionate ligand system enabled intermolecular aurophilic interactions in the Au(i) functionalized dimolybdenum(ii) complexes. Depending on the Au(i) species applied, either a dimeric structure or a 1D coordination polymer was formed in the solid state. These structures represent the first examples of heterometallic dimolybdenum(ii) complexes, forming supramolecular structures via aurophilic interactions.

中文翻译：

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二钼桨轮作为异多金属结构的基础。

二苯膦官能化的丙酸用于合成杂多金属二钼（ii）配合物。该配体同时具有羧酸和膦的功能性，从而可以在第一步中选择性合成四羧酸酯桥连的Mo2（ii）-叶轮结构。由于对称排列的膦官能团，二钼（ii）配合物被用作金属配体。随后的过渡金属离子如金（i），铑（i），铱（i）或钌（ii）与膦部分的配位允许形成杂多金属结构。二苯基膦酸丙酸酯配体系统的灵活性使Au（i）功能化的二钼（ii）配合物中的分子间亲油相互作用成为可能。根据所用的Au（i）种类，固态形成二聚结构或一维配位聚合物。这些结构代表了异金属二钼（ii）配合物的第一个实例，它们通过亲金相互作用形成超分子结构。