Catena-poly[[dinitratocadmium(II)]bis[mu-bis(2-methyl-1H-imidazol-1-yl)methane-kappa(2)N(3):N(3')]].

The title compound, [Cd(NO(3))(2)(C(9)H(12)N(4))(2)](n), has a one-dimensional double-bridged chain polymer structure with a 16-membered macrometallacyclic tetragonal structural motif. The Cd(II) ion occupies a crystallographic inversion centre and is coordinated by four equatorial N atoms from four distinct bis(2-methylimidazol-1-yl)methane ligands and two apical nitrate O atoms to form a slightly distorted octahedral coordination geometry.