Silver(I) complexes of 6-methyl-2-pyridinecarboxylic acid: the crystal structure of [Ag(MeC5H3NCOO)(MeC5H3NCOOH)]

Silver(I) complexes of 6-methyl-2-pyridinecarboxylic acid (HL) have been pr epared, and the crystal structure of [Ag(L)(LH)] has been determined from X -ray diffraction data. This complex crystallizes in the monoclinic space gr oup P2(1)/n, with a = 13.4055(13), b = 7.1012(7), c = 15.588(2) Angstrom, b eta = 112.779(2)degrees, and Z = 4. Anionic [AgL2](-) units are linked toge ther by protons in approximately symmetrical linear O-H-O hydrogen bonds in volving uncoordinated carboxylate oxygen atoms, to give polymeric chains. T he most significant intermolecular interaction between adjacent parallel ch ains is offset ring stacking of pairs of aromatic rings with a perpendicula r distance of 3.27 Angstrom. The Ag coordination geometry is highly distort ed tetrahedral, from two pyridine N atoms and two carboxylate O atoms, each Ligand forming a five-membered chelate ring.