Preparation of an Organometallic Molecular Square by Self-Assembly of Phosphorus-Containing Building Blocks

摘要

Molecular squares are among the most common supramolecular architectures, but phospha-organometallic complexes have not been used as building blocks for this type of structure. Herein we describe the formation of the molecular square [Au{Co(P2C2tBu2)2}]4 (1) by the self-assembly of anionic 1,3-diphosphacyclobutadiene cobalt complexes and gold(I) cations. The X-ray crystallographic determination of the molecular structure of 1 is complemented by solid-state ~(31)P and ~(13)C NMR investigations. High-level DFT calculations confirm the assignment of the ~(31)P and ~(13)C NMR resonances.