catena-Poly[[bis­(nitrato-κ²O,O′)zinc(II)]-μ-4,4′-bis­(pyrazol-1-ylmeth­yl)biphenyl-κ²N²:N^2′]

In the title compound, [Zn(NO₃)₂(C₂₀H₁₈N₄)]_n, the Zn^II atom lies on a crystallographic twofold axis and the coordination geometry can be considered as a slightly distorted tetra­hedron defined by two O atoms from two nitrate groups and two N atoms from two ligand mol­ecules. A distorted octa­hedron may be assumed when two of the symmetry-related nitrate O atoms, with Zn—O distances of 2.528 (2) Å, are added to the coordination environment. Another twofold axis, passing through the middle of the biphenyl bonds, is observed in the crystal structure. A chain along [101] is built up by the ligands linking the Zn^II ions.

catena-Poly[[bis­(nitrato-κ²O,O′)cobalt(II)]-μ-4,4′-bis­(pyrazol-1-ylmeth­yl)biphenyl-κ²N²:N^2′]

In the title compound, [Co(NO₃)₂(C₂₀H₁₈N₄)]_n, the Co^II atom lies on a crystallographic twofold axis and the coordination geometry can be considered as a slightly distorted tetra­hedron defined by two O atoms from two nitrate groups and two N atoms from two ligand mol­ecules. A distorted octa­hedron may be assumed when two of the symmetry-related nitrate O atoms with Co—O distances of 2.3449 (19) Å are added to the coordination environment. Another twofold axis, passing through the middle of the biphenyl bonds, is observed in the crystal structure. A chain is built up by the ligands linking the Co^II ions along [101].