Self-assembly in tetrameric 1:1 silver(I) halide:tri-p-tolylphosphine complexes: An in-depth structural investigation

The reaction of silver(I) bromide with tri(p-tolyl)phosphine in MeCN solution in 1:1 molar ratios resulted in a complexes of the formula [AgBr{P(4-MeC6H4)3}]4. This compound has a tetrameric structure with a concave coordination polyhedron, in between a cube and a stella quadrangula. Weak silver–silver interactions were observed. The current compound is compared to the Cl and I analogs using distance–distance plots. The silver–silver interactions seem to dominate the geometry of these tetrameric type of complexes.