A novel cobalt(II) coordination polymer with an unusual four‐connected 42.63.8 topology

In the cobalt(II) coordination polymer poly(μ₂‐benzene‐1,3‐dicarboxylato){μ₂‐1,1′‐2,2′‐oxybis(ethane‐2,1‐diyl)]di‐1H‐imidazole}cobalt(II)] monohydrate], {Co(C₁₀H₁₄N₄O)(C₈H₄O₄)]·H₂O}_n, two crystallographically distinct Co^II cations are four‐coordinated by N₂O₂ donor sets in distorted tetrahedral geometries. The Co^II centers are connected by benzene‐1,3‐dicarboxylate (m‐BDC) anions, giving two types of linear chains, which are further joined via meso‐helical 1,1′‐2,2′‐oxybis(ethane‐2,1‐diyl)]di‐1H‐imidazole ligands to yield a thick two‐dimensional slab. The compound displays a two‐dimensional four‐connected 4².6³.8 topology, which is unprecedented in coordination polymers.