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

Abstract 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)]·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 ]·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 .