Solvent Dependent Crystallization of Isomeric Chain Coordination Polymers in the Ce-Zn/Cd-dipic System.

Six linear chain coordination polymers containing alternating Ce IVand Zn II/Cd IIcoordination polyhedra are formed with dipicolinic acid (dipicH 2) depending upon the crystallization conditions. They belong to three isomeric types that differ in the way the tricapped trigonal prismatic polyhedra of [Ce(dpic) 3] 2−are linked with the Zn/Cd octahedra. The different isomers differ in complexity as reflected in their angularity and repeat units. Highly angular chains lead to porous structures, one of which incorporates a 16-water cluster. [ABSTRACT FROM AUTHOR]