Two New Cu(II) Coordination Polymers Based on 1,2-bi(4-pyridyl)ethene and 4-R-phthalic acid (R = –C(CH₃)₃ or -CH₃): Syntheses, Structures, and Characteristics

Crystal structure of poly-[(μ2-((1,3-bis(benzimidazol-1-yl)propane-κ2 N:N′)(μ2-4-tert-butyl-phthalato-κ2 O:O′)cobalt(II)] monohydrate, C29H30CoN4O5

“…Phthalic acid (benzene-1,2-dicarboxylic acid) and its derivatives have been used to construct coordination polymers [6,7]. We have explored the structural transformation mediated by 4-R-phthalic acid (R = −C(CH 3 ) 3 or −CH 3 ) and N-donor ligands [8]. Among diimine-type N-donor co-ligands, 1,3-bis(benzimidazol-1-yl)propane (bbip) is a flexible ligand, with the potential to serve as bridging ligand, which are employed to construct new CPs [9][10][11].…”

Solvent-Mediated Synthesis of M(II)-Coordination Polymer Part 1: Crystal Structure of Poly(1,2-di(4-pyridyl)ethylene-k2N,N')-bis(1,4-benzenediacetato-k4O,O′,O′′,O′′')zinc(II)], C22H18ZnN2O4

“…Versatile carboxylate ligands derived from 1,4-benzenedicarboxylic acid, 1,3,5-benzenetricarboxylic acid, 1,2,4,5-benzenetetracarboxylic acid, or pyridine-2,4-dicarboxylic acid are commonly used owing to their abundant carboxylate groups possessing high affinity to metal cations [7][8][9]. Other functionalized ligands such as 1,2-bis(4-pyridyl)ethylene, 1,4-benzenediacetic acid, 4,4 -bipyridylethene, or 3-nitro-1,2-benzenedicarboxlic acid have also been extensively used under diverse synthetic conditions to prepare MOFs [10][11][12][13][14][15][16][17], which are used in several applications [18][19][20][21][22]. The interest in the use of phenylenediacetic acid as ligand in the synthesis of coordination polymers stems from the presence of the flexible −CH 2 spacer that enables the −CO 2 − units to freely bend and rotate to meet the requirements of the coordination geometries of metal ions in the assembly process [23].…”