Polymeric Molecular Pattern in the Crystals of a Calcium(ii) Complex With Pyridine-3,4-Dicarboxylate and Water Ligands

Dimeric Molecules in the Crystals of Calcium Complex with Pyridine-3,5-Dicarboxylate Ligand

“…Like the structure of the Ca(II) complex with pyridine-3,4-dicarboxylate [1] only one carboxylate group participates in chelating the metal ion, the second group being active in the hydrogen bond network. The atoms of this group, the atoms constituting the pyridine ring and the atoms of the bridging carboxylate group are coplanar: the mean deviation from the best plane is 0.028 î A.…”

“…The maximum deviation from the average plane is shown by the atoms: O1 ( 0.541 î A) and O9 (À 0.533 î A), the minimum shift is 0.026 î A (O6). The oxygen atoms O2 and O7 constitute the apices of the pyramid: the angle O2 ± Ca ± O7 is 168.4 (1) . Table III contains more details of this coordination geometry.…”

“…In this paper we report the results of an X-ray diraction structural investigation of the Ca(II) complex with pyridine-3,5-dicarboxylate (3,5-PDDC or dinicotinate). It follows our previous study of the crystal and molecular structure of a Ca(II) complex with pyridine-3,4-dicarboxylate (cinchomeronate) ligand [1]. It is also a part of a series of papers reporting the crystal structures of Ca(II) complexes with pyridine dicarboxylate ligands [3].…”

A new mixed ligand coordination polymer of Mn(II): structural aspect and cryomagnetic study

“…In this regard, pyridine dicarboxylic acids have been shown to be interesting and versatile ligands [16,17], as they exhibit various coordination modes, and have been used to prepare a variety of structures with different dimensionalities [18,19]. However unlike pyridine-2,4-, 2,5-, 2,6-and 3,4-, dicarboxylic acids [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] which are widely reported as bridging ligands in the assembly of various coordination polymer complexes, pyridine-2,3-dicarboxylic acid acts as a chelating bidentate and bridging ligand (Scheme 1) to form rare discrete, 1-D chain, 2-D layer and 3-D structures [19,[40][41][42].…”

A polymeric Mn complex with mixed pyridine-3,4-dicarboxylate/4,4′-bipyridine ligands: [Mn2(C7H3NO4)2(C10H8N2)2]n·2nH2O

“…As a ligand, pyridine-3,4-dicarboxylic acid contains the merits of p-pyridinecarboxylic acid and m-pyridinecarboxylic acid, showing an excellent building block with charge and multi-connecting ability. As far as we are aware, there are only several reports on the structures of transition metal complexes with pyridine-3,4-dicarboxylic acid ligand [7][8][9][10][11][12][13].…”