Poly[[bis­(dimethyl­formamide)[μ(7)-5,5′-(methyl­enedi­oxy)diisophthalato]dizinc] dimethyl­formamide monosolvate]

In the crystal structure of the title coordination polymer, {[Zn(2)(C(17)H(8)O(10))(C(3)H(7)NO)(2)]·C(3)H(7)NO}(n), the mol­ecular build­ing block (MBB), viz. {Zn(2)(CO(2))(4)(C(3)H(7)NO)(2)}, comprises two zinc atoms, each bridged by three carboxyl­ate groups. These two Zn atoms exhibit different coordination environments: a distorted coordination intermediate between trigonal–pyramidal, and square–pyramidal formed by the two coordinated dimethyl­formamide mol­ecules and three carboxylate groups, and a distorted tetra­hedral coordination defined by carboxy­late groups of which three are bidentate bridging and the fourth is a monodentate ligand. Thus, each ligand connects four MBBs, forming the three-dimensional polymer.