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)

Abstract

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.