A tetrahedrally coordinated AgI and NiII complex with a two‐dimensional framework containing one‐dimensional helical chains

The title complex, polybis(μ₆‐pyridine‐2,6‐dicarboxylato N‐oxide)nickel(II)disilver(I)], Ag₂Ni(C₇H₃NO₅)₂]_n or Ag₂Ni(pydco)₂]_n (H₂pydco = pyridine‐2,6‐dicarboxylic acid N‐oxide), has a two‐dimensional sheet structure. The two carboxylate groups adopt two coordination modes. The Ni^II ion displays a distorted octahedral geometry, bonded to two carboxylate O atoms of two different pydco ligands and four O donors from another two ligands, i.e. two carboxylate O atoms and two N‐oxide O atoms. The Ag^I ion adopts a tetrahedral coordination, linked by three O atoms of three different carboxylate groups and an N‐oxide O atom.