SYNTHESES OF COBALT AND NICKEL COORDINATION POLYMERS COMPOSED OF 1,3-ADAMANTANEDICARBOXYLATE AND BIS(4-(1H-IMIDAZOL-1-YL)PHENYL) METHANONE LIGANDS

Abstract Two coordination polymers, {[Co 2 (L 1 ) 2 (adc) 2 ]·5H 2 O} n ( 1 ) and {[Ni(L 1 ) 2 (Hadc) 2 ]} n ( 2 ) (L 1  = bis(4-(1 H -imidazol-1-yl)phenyl)methanone, H 2 adc = adamantane-1,3-dicarboxylic acid), have been synthesized and structurally characterized. In 1 , Co1 is five-coordinated by three oxygen atoms of two adc 2– and two nitrogen atoms from two L 1 ligands. The neighboring [Co(adc)] 2 dimers are linked through four L 1 ligands to form a 1D ladder structure. In 2 , Ni1 is six-coordinated by two oxygen atoms from two Hadc – ligands, four nitrogen atoms from four distinct L 1 ligands to give a slight distorted octahedral geometry. The [Ni(Hadc) 2 ] units are bridged by L 1 ligands to form 1D looped chains.