Concomitant crystallization of two polymorphs-a ring and a helix: concentration effect on supramolecular isomerism

摘要

For the first time in Ag coordination chemistry, two supramolecular isomers, a ring and a helix, are isolated from the same mother liquor as a result of concentration effects.During the past years,there has been considerable interest in the supramolecular architectures that can possibly be obtained by the combination of organic building blocks with transition metal ions.' In this context,it has been shown that coordination polymers constructed from rigid organic ligands show parallels with some standard inorganic compounds such as i.e.graphite,diamond or wurtziter However,with more flexible building blocks,the structures become less predictable/ When considering likely transition metal geometries,some predictions can be made,as to