New α,ω-dicarboxylate coordination polymers with 4,4′-bipyridine: Cu(bpy)(C5H6O4), Zn(bpy)(C5H6O4), Zn(bpy)(C6H8O4) and Mn(bpy)(C8H12O4) · H2O

Metal dimers are co-bridged by 4,4-bipyridine (bpy) and dicarboxylate anions such as glutarate, adipate and suberate anions into (4,4) open layers in Cu(bpy)(C5H6O4) 1, Zn(bpy)(C5H6O4) 2 and Mn(bpy)(C8H12O4) · H2O 4 as well as into 3D frameworks in Zn(bpy)(C6H8O4) 3. Twofold interpenetration of 3D frameworks completes the crystal structure of 3.