NEW, STABLE, CHELATED, TETRACOORDINATED SILVER(I) COMPLEXES OF THE 2-(ARYLAZO)PYRIDINE LIGAND SYSTEM - SYNTHESIS, CHARACTERIZATION AND ASSESSMENT OF BONDING AND STRUCTURE

The 2-(arylazo)pyridines (L, 1) in methanol gave bis-chelated silver complexes, [AgL2]+ (2), as the crystalline perchlorate salts which were characterized by elemental analyses. The complexes are 1:1 electrolytes in methanol. In contrast to the copper analogue, there is only a small shift of v(NN) to low energy in the IR spectrum of [AgL2]+ as compared to that of uncoordinated L, indicating a negligible dπ-π*(L) interaction. The high resolution 1H NMR spectra of silver complexes with different substituted ligands (L1-L3) are reported. The complexes are quite stable and solutions in methanol and chloroform obey Beer's law. © 1990.