Multifunctional Pyrazolate Ligands for Controlling d10–d10 Interactions of Oligonuclear Coinage Metal Complexes

Pyrazoles hold a prominent position as ligands in coordination
chemistry and their complexes with monovalent
coinage metal ions (CuI, AgI, and AuI) have attracted
widespread interest in the last decades. These compound
can adopt a variety of structures, ranging from polymeric
chain to oligomeric aggregates of different nuclearities. Besides,
they often show fascinating luminescence properties
and tendency to aggregate in the solid state forming supramolecular
structures. Both phenomena are mainly due to attractive
interactions between the closed shell orbitals of the
monovalent d10 coinage metal atoms. The intermolecular,
ligand unsupported, metallophilic interactions are anyway
weak forces highly sensitive to factors other than just the
metal ion and are thus difficult to predict and control. This
work investigates the strategies to direct and maximize the
metallophilic contacts within this family of complexes.