A novel cobalt(Π) coordination polymer {Co(phen)(H 20) [C8H 14(COO)2]}" (CH3θH)" has been hydrother-mally synthesized by the reaction of (lS,3i?)-l,2,2-trimethyl-l,3- cyclopentanedicarboxyric acid [(lS,3i?)-camphoric acid, C 8H 14(COOH) 2], l,10-phenanthroline(phen) and hydrous cobalt sulfate in the solvent mixture of water and methanol. Crystal data for this complex: monoclinic, space group P2 1/n, α= 1.230 33(11) nm, b = 1.363 18(12) nm, c=1.38891(12) nm, ß= 106.5700(10)°, V=2.2327(3) nm 3, D c=1.450 gcm- 3, Z=4, F(000)=1 020, final GooF...