Coordination chemistry of Ag(i) with bridging ligands based on pyrazolyl–pyridine termini: polymers, helicates and a bow-tie

RSC Advances Pub Date: 2012-09-11 DOI: 10.1039/C2RA21757K

Abstract

A series of Ag(I) complexes has been prepared containing bridging ligands based on two pyrazolyl–pyridine ligands connected by a flexible spacer. Crystallographic investigations reveal a remarkable range of structural types from simple mononuclear complexes to dinuclear double helicates, a distorted ‘bow-tie’ metallamacrocycle, and one-dimensional chains including a triple helical chain based on double helical molecular units linked by Ag?Ag contacts. The different structures arise as a result of the different interactions dominating in each complex, including aromatic π-stacking, Ag?Ag interactions, exocyclic lone pair interactions and inter-ligand π-stacking.

Graphical abstract: Coordination chemistry of Ag(i) with bridging ligands based on pyrazolyl–pyridine termini: polymers, helicates and a bow-tie
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