Influence of geometric isomerism within dipyridylamide coligands on topology of copper adipate coordination polymers, including a new simple self-penetrated network

Hydrothermal reactions of a divalent copper salt, adipic acid (H(2)adp), and a dipyridylamide coligand have afforded four new crystalline coordination polymer solids, whose topologies depend critically on the specific dipyridylamide geometric isomer. [Cu(adp)(3-pina)](n) (1, 3-pina = 3- pyridylisonicotinamide) has a standard (4,4) grid layer topology, while {[Cu(adp)(3-pna)]center dot 2.5H(2)O}(n) (2, 3-pna = 3-pyridylnicotinamide) possesses a dimer-based 3-D network with 6(5)8 cds topology. Use of 4-pyridylnicotinamide (4-pna) as coligand afforded {[Cu-3(adp)(3)(4-pna)(2)]center dot 2H(2)O}(n) (3), which manifests a unique binodal 4,6-connected self-penetrated (6(5)8)(4(4)6(11)) 3-D topology. {[Cu(adp)(4-pna)(2)](n) (4) is a simple 1-D chain polymer, obtained as a minor product during the synthesis of 3. Thermal properties of these materials are also discussed, along with the variable temperature magnetic properties of 2 and 3. (C) 2014 Elsevier B.V. All rights reserved.