Structure and Physical Properties of Two- and Three-Dimensional Divalent Metal Adipate Coordination Polymers with Bis(4-pyridylmethyl)piperazine Tethers

Abstract

ACKNOWLEDGMENTWe acknowledge the donors of the American Chemical Society Petroleum Research Fund for funding this work. We thank Chaun Gandolfo and Amy Pochodylo for acquiring the variable temperature magnetic susceptibility data. R.L.L. thanks Aldo Tagliapietra for assistance in manuscript preparation.

A one-dimensional zinc(II) coordination polymer based on mixed multidentateN- andO-donor ligands

“…For aliphatic dicarboxylic acids, which have two carboxylic acid groups, the great richness and variation of coordination modes can generate unforeseen structure patterns and packing frameworks. In addition, the two carboxylic acid groups are separated by -(CH 2 ) n -spacers which can bend and rotate freely, generating conformational changes to accommodate the coordination environment (Zhang et al, 2014;Banisafar et al, 2011). For example, in the complexes [Cd 2 Cl 2 (suc)(imb) 2 -(H 2 O)] n , {[Cd(glu)(imb)]H 2 O} n and {[Cd 2 Cl 2 (adi)(imb) 2 ]Á-2H 2 O} n {imb = 2-[(1H-imidazol-1-yl)methyl]-1H-benzimidazole, H 2 suc = succinic acid, H 2 glu = glutaric acid and H 2 adi = adipic acid; Zhang et al, 2014}, suc 2À exists in an anti conformation and bridges two Cd II ions in chelating and monodentate modes, glu 2À displays a gauche-anti conformation and bridges three Cd II ions in tridentate bridging and monodentate modes, and adi 2À features an anti-anti-anti conformation and bridges two Cd II ions in a chelating mode.…”

Crystal structure of catena-poly[hexaaquabis(μ2-3-nitrophthalate-κ2 O:O′)-(μ2-1,4-bis(4-pyridylmethyl)piperazine-κ2 N:N′)dimanganese(II)] dihydrate, C32H42Mn2N6O20

“…Though the nitro group does not participate in coordination, NbdcH 2 may provide the potential to construct unpredictable and interesting network structures due to the existence of an electronwithdrawing nitro-group on the aromatic backbone. In the title compound we use 3-nitrophthalate as a main ligand, and 1,4-bis(4-pyridylmethyl)piperazine (bpmp) as coligand to construct a new coordination polymer not only because bpmp has twisted conformation, also its four nitrogen atoms may improve the structures and properties of coordination polymers [15,16]. The title structure is a 1D coordination polymer with dinuclear units.…”

A three-dimensional supramolecular framework based on the interlinkage of an interpenetrating diamondoid coordination network

“…This is because of the conformational flexibility through energetically facile -bond rotation within the polymethylene chains which can result in a great diversity of coordination modes and conformations in response to specific supramolecular environments during selfassembly. In particular, synergistic interactions between aliphatic chains and ancillary pyridyl-based ligands have promoted the generation of a wide variety of topologies in metal-adipate coordination compounds (Shyu et al, 2009;Banisafar et al, 2011;Wilson et al, 2013). Among the previously reported metal-adipate compounds, the topologies of cadmium-adipate compounds have revealed a critical dependence on the nature of the ancillary dipyridyl ligand.…”

“…For example, with the capping 4,4 0 -dipyridylamine ligand, a twofold interpenetrating pcu network could be obtained (Shyu et al, 2009). When the long ligand bis(pyridin-4-ylmethyl)piperazine was used, a simple sql net or a fivefold 6 6dia framework was produced (Banisafar et al, 2011). If other dipyridyl ligands are used, can the reaction system generate other different structural motifs?…”