Supramolecular architecture and regularities of crystal packings of the heterocyclic gold(III) iminatoamine complexes

A Polymorphic Gold(III) Complex Comprising a Multifunctional Triazolylpropanamide Ligand

“…The van der Waals distance of two chlorine atoms is 350 pm . The existence of attractive halogen–halogen interactions in metal complexes has been previously discussed , , …”

“…The highest feasible coordination number of Au 3+ is six, even though it is realized in only very few square‐bipyramidal complexes , . In the majority of gold(III) complexes, the metal atom displays a square‐planar coordination . In this mode, the Au atom can formally be regarded as coordinatively unsaturated, and the two unoccupied coordination sites allow for secondary bonding interactions.…”

“…Gold(III) compounds also attracted attention due to their rich structural chemistry, as many of them form supramolecular assemblies in the solid state. These supramolecular complexes often contain sulfur ligands such as dithiocarbamate anions, although structures with nitrogen ligands have also been reported . The significant tendency toward supramolecular aggregation can not only be addressed to hydrogen bonding,, , , but also to characteristic coordination features of gold(III).…”

“…These supramolecular complexes often contain sulfur ligands such as dithiocarbamate anions, [13][14][15][16][17][18][19] although structures with nitrogen ligands have also been reported. [20][21][22][23] The significant tendency toward supramolecular aggregation can not only be addressed to hydrogen bonding, [20,21,24,25] but also to characteristic coordination features of gold(III). The highest feasible coordination number of Au 3+ is six, even though it is realized in only very few square-bipyramidal complexes.…”

“…In this mode, the Au atom can formally be regarded as coordinatively unsaturated, and the two unoccupied coordination sites allow for secondary bonding interactions. The latter do not only include attractive interactions with free σ-donating sites of adjacent molecules, [11,[13][14][15][16][17][18][19][21][22][23] but also with π-donating systems. [28] In contrast, aurophilic Au•••Au interactions, that have attracted broad interest in the past 20 years, [29,30] are of minor importance in the trivalent oxidation state of gold.…”