New silver(I) complexes of Schiff base with hydrogen-bonding interactions: effects of anions on the framework formations of complexes

Two new one-dimensional AgI complexes, [AgL(NO3)]∞ (1) and {[AgL](ClO4)}∞ (2) (L=N,N′-bis(2-hydroxyethy)-p-phenylenedimethyleneamine), have been synthesized and their structures were determined by single-crystal X-ray diffraction analysis. 1 crystallizes in the monoclinic system, space group Cc, with a=13.305(5), b=14.107(5), c=7.608(3) Å, β=97.226(6)° and Z=4, while 2 crystallizes in the monoclinic space group C2/c, with a=12.902(5), b=8.671(3), c=27.776(11) Å, β=97.796(6)° and Z=8. In 1, the AgI atom adopts distorted N2O2 tetrahedral coordination geometry, while in 2, the AgI center is coordinated by two nitrogen atoms from two different L ligands. The structural differences of 1 and 2 suggest that counter anions have a profound effect upon the framework formations of AgI complexes with the ligand L. The strong and weak hydrogen-bonding interactions in 1 and 2 extend two one-dimensional complexes into two quasi two-dimensional networks, and such weak interactions further stabilized two complexes.