Copper dimethylmalonate coordination polymers with 4,4′-bipyridine coligands: Kinetic and thermodynamic products with different dimensionalities

• Published in: Inorganica Chimica Acta Vol. 438; pp. 52 - 57
• Main Authors: Stone, Brandon S., Sample, Alexander D., LaDuca, Robert L.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.11.2015
• Subjects: Bipyridine; Coordination polymer; Copper; Crystal structure; Copper; Coordination polymer; Bipyridine; Crystal structure
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/j.ica.2015.08.034

{[Cu2(dmmal)2(bpy)1.5(H2O)]·2H2O}n (1), the kinetic product, displays a 2D layer with an unprecedented topology comprising alternating rows of hexagonal and rectangular circuits (pictured). The thermodynamic product, {[Cu3(dmmal)3(bpy)3(H2O)4]·H2O}n (2), manifests a 4-connected self-penetrated 658 cds topology. [Display omitted] •Copper dimethylmalonate coordination polymers with 4,4′-bipyridine.•Solvent-diffusion self-assembly synthetic method.•Kinetic product displays a 2D layer with an unprecedented topology.•Thermodynamic product manifests a 4-connected self-penetrated 658 cds topology. Slow diffusion of an ethanolic solution of 4,4′-bipyridine (bpy) into an aqueous solution of copper dimethylmalonate (dmmal) afforded two different coordination polymer complexes as time elapsed. These were structurally characterized via single-crystal X-ray diffraction. A small amount of light blue crystals of {[Cu2(dmmal)2(bpy)1.5(H2O)]·2H2O}n (1) were initially deposited at the solution interface. Compound 1 displays a 3,4-connected 2D layer with an unprecedented (426)(42638) topology comprising alternating rows of hexagonal and rectangular circuits. These crystals dissolved as the reaction continued, with dark blue crystals of {[Cu3(dmmal)3(bpy)3(H2O)4]·H2O}n (2) forming at the bottom of the reaction vessel. Compound 2 manifests a 4-connected self-penetrated 658 cds topology. Thermal properties of 2 are also reported.