How many structures are there for {[AgL](NO3)(H2O)n}?: Water-content dependent variations in the structure of {[AgL](NO3)(H2O)n}, n=0, 1, 2; L = ethanediyl bis(isonicotinate)

Three compounds of the composition [AgL](NO3)(H2O)(n), n = 0 ( 1), 1 ( 2), 2 ( 3) have been obtained with different structures each. Whereas 1 builds single chains of ...-Ag-L-Ag-L-... crosslinked by NO3- anions to form two-dimensional layers, the conformation of L changes from anti to syn in 2, yielding pairs of chains with close Ag-Ag contacts. The anti conformation of the ligand L is again adopted in 3, and pairs of chains are now arranged in a parallel fashion. Calculations give a qualitative understanding of involved forces.