Two new Co coordination polymers with multifunctional 5-amino-2,4,6-tribromoisophthalic acid and flexible isomeric bis(imidazole) ligands: preparation, crystal structure and characterization.

Two new Co coordination polymers (CPs), namely, catena-poly[[[(5-amino-2,4,6-tribromobenzene-1,3-dicarboxylato-κO)aquacobalt(II)]-bis[μ-1,3-bis(imidazol-1-ylmethyl)benzene-κN:N']] 4.75-hydrate], {[Co(CHBrNO)(CHN)(HO)]·4.75HO}, (1), and poly[(μ-5-amino-2,4,6-tribromobenzene-1,3-dicarboxylato-κO:O)[μ-1,2-bis(imidazol-1-ylmethyl)benzene-κN:N']cobalt(II)], [Co(CHBrNO)(CHN)], (2), have been synthesized successfully by the assembly of multifunctional 5-amino-2,4,6-tribromoisophthalic acid (HATBIP) and Co ions in the presence of the flexible isomeric bis(imidazole) ligands 1,3-bis(imidazol-1-ylmethyl)benzene (mbix) and 1,2-bis(imidazol-1-ylmethyl)benzene (obix).