Cadmium carboxycinnamate coordination polymers with dimensionality differences depending on dipyridyl ligand

Cu-PDC-bpa solid coordination frameworks (PDC=2,5-pyrindinedicarboxylate; bpa=1,2-DI(4-pyridil)ethane)): 2D and 3D structural flexibility producing a 3-c herringbone array next to ideal

“…Furthermore, we identified the structural parameters defining the 3-c herringbone arrays, correlating angles and distances (Scheme 2) [39,[48][49][50][51][52][53][54][55][56].…”

CuII–PDC-bpe frameworks (PDC = 2,5-pyridinedicarboxylate, bpe = 1,2-di(4-pyridyl)ethylene): mapping of herringbone-type structures

“…The term "herringbone" is used in the literature to describe a variety of 2D arrays with four-connected nodes (4-c) [30][31][32][33] and three-connected nodes (3-c). [34][35][36][37][38][39][40][41][42] Scheme 2 shows that both arrays consist of the 2D packing of fourvertex polygons that exhibit nodes with three (3-c) and four connections (4-c), respectively.…”

Metal‐Dependent Topologies and Water Aggregations in Copper and Nickel Carboxycinnamate Coordination Polymers with a Long‐Spanning Dipyridylamide Ligand

“…These are anchored to the coordination polymer network by donating hydrogen bonds to both unligated cca carboxylate oxygen atoms and 4‐bpfp formyl groups. Although the analogous cadmium coordination polymer [Cd(cca)(4‐bpfp)] n also shows {MO 4 N 2 } octahedral coordination environment similar to that of 2 ,13 its lack of aqua ligands encourages formation of {Cd 2 (OCO) 2 } dimeric units and a non‐interpenetrated pcu topology similar to 1 , instead of the twofold interpenetrated diamondoid net of 2 . The 3D structure of 2 also contrasts with the 2D layered structure of {[Co(pht)(4‐bpfp)(H 2 O) 2 ] · H 2 O} n ,11 although { M O 4 N 2 } octahedral coordination arrangements are present in both.…”

“…[Cd(cca)(bpy)] n possesses a (4,4) grid 2D layer built from [Cd 2 (cca) 2 ] double chains pillared by bpy ligands, [12] while use of the longer bis(4-pyridylmethyl)piperazine (4-bpmp) ligand produced the (6,3) herringbone layered phase {[Cd(cca)(4-bpmp)(H 2 O)]· 2H 2 O} n . [13] [Cd(cca)(4-bpfp)] n manifests a {Cd 2 (OCO) 2 } dimer-based 6-connected 4 12 6 3 pcu 3D network, [13] different from the 2D topologies seen in the bpy and 4-bpmp cases. The π bond within the long carboxylate arm of cca also proved susceptible to in situ reaction chemistry under hydrothermal conditions, likely via nucleophilic attack at antibonding π* orbitals.…”

“…In contrast to the ortho ‐dicarboxylate ligand pht, the 2‐carboxycinnamate ligand (cca, Scheme ), in which one carboxylate arm is a conformationally rigid three‐carbon chain containing a trans π bond, has been employed far less frequently in the construction of dual‐ligand dicarboxylate/dipyridyl coordination polymers. [Cd(cca)(bpy)] n possesses a (4, 4) grid 2D layer built from [Cd 2 (cca) 2 ] double chains pillared by bpy ligands,12 while use of the longer bis(4‐pyridylmethyl)piperazine (4‐bpmp) ligand produced the (6, 3) herringbone layered phase {[Cd(cca)(4‐bpmp)(H 2 O)] · 2H 2 O} n 13. [Cd(cca)(4‐bpfp)] n manifests a {Cd 2 (OCO) 2 } dimer‐based 6‐connected 4 12 6 3 pcu 3D network,13 different from the 2D topologies seen in the bpy and 4‐bpmp cases.…”