How well do we understand self-assembly algorithms? From prototype grid to polymers

Algorithms used for the assembly of metallosupramolecular constructs are simple and based upon well-established principles of coordination chemistry. The multinucleating ligand 3,6-bis(2-pyridyl)pyridazine forms a [2 x 2] grid with copper(l); the related ligand 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine (dptz) is expected to behave in a similar manner with silver(l). However, instead of the expected grid, [Ag(dptz)(2)](+) Solution species are formed. In the solid state, dinuclear [Ag-2(dPtZ)(2)](2+) and polymeric [{Ag(dptz-N,N')(mu-dptz)}(n)](n+) complexes have been structurally characterised.