Syntheses, crystal structures and magnetic properties of two adamantane-1,3-dicarboxylato bridged cobalt(II) phenanthroline complexes

Two adamantane-1,3-dicarboxylato bridged cobalt(II) phenanthroline complexes [Co2(H2O)2(phen)2(adc)2]·(C2H7N)·2H2O (1) and [Co(H2O)(phen)(adc)]H2O (2) were synthesized and characterized. They feature a centrosymmetric dinuclear complex molecule and a coordination polymeric chain, respectively. The magnetic characterizations exhibit an overall weak antiferromagnetic behavior for 1 and an weak ferromagnetic behavior over 300-75 K followed by antiferromagnetic behavior below 75 K for 2.