Arene‐Sandwiched Silver(I) Pyrazolates

Abstract

A silver filling: The π‐acidic, trinuclear silver(I) pyrazolate [{[3,5‐(CF3)2pz]Ag}3] readily reacts with simple electron‐rich aromatic hydrocarbon compounds to form sandwich complexes. The type of complex formed depends on the solvent and the arene, and includes supramolecular stacks. Additionally, some of these complexes appear to have interesting luminescence properties.

1,1′‐Bis(pyrazol‐4‐yl)ferrocenes: Potential Clip Ligands and Their Supramolecular Structures

“…Intermolecular d 10 –d 10 interactions usually lead to the formation of ordered supramolecular aggregates of polymeric [M(µ‐pz)] ⋡ , or trimeric [M(µ‐pz)] 3 units in the solid state . If the electronic characteristics of the ligands are changed, these complexes can act either as π‐acids or π‐bases,[7c] and several supramolecular adducts with aromatic molecules[7c], [7d], or metal‐based Lewis acids have been reported. Moreover, intra‐ and intermolecular metallophilic contacts are the main factors responsible for the fascinating luminescence properties associated with this class of compounds ,.…”

Revealing High-Lying Intersystem Crossing in Brightly Luminescent Cyclic Trinuclear CuI/AgI Complexes

“…2.8 Å), whereas Cu-4 stacks as a stair-like column. The coordination configuration and packing mode of Ag-2 are similar to those of Cu-2 , but the Ag–Ag contacts are weaker than the Cu analogues, which is common in the literature. − …”

Interaction between Trinuclear Regium Complexes of Pyrazolate and Anions, a Computational Study

“…Triangular structures corresponding to nine-membered rings (three metal atoms and six atoms of the ligands) are well-known and they were reported in the literature (Figure 1, left hand side), for instance, imidazolates with coinage metals [56], phenylenes (most examples correspond to o-tetrafluorophenylene) with mercury [57,58] and 1,2-dicarba-closo-dodecaboranes with gold(I) [59,60]. Pyrazolate ligands (Py) with coinage metals, forming regium bonds, are also common, in any oxidation state: Cu(I)/Cu(II), Ag(I) and Au(I)/Au(III) [56,[61][62][63][64][65][66]. Particularly, cyclic [Py-M(I)] 3 systems with M = Cu, Ag and Au were studied [67] and the experimental evidences of the (Py-Cu) 3 systems with simultaneous interactions of the three copper atoms with one hydroxyl group were recently reviewed [68].…”