121 research outputs found
Bis(4-carboxypyridine-2-carboxylato-κ2 N,O 2)copper(II) dimethyl sulfoxide disolvate
In the title complex, [Cu(C7H4NO4)2]·2C2H6OS, the CuII atom is situated on an inversion centre and is N,O-chelated by two monoanionic 4-carboxypyridine-2-carboxylate ligands in a slightly distorted square-planar coordination geometry. The dimethyl sulfoxide solvent molecules and CuII complex molecules are linked by O—H⋯O hydrogen bonding. In addition, C—H⋯O contacts and π–π interactions [centroid–centroid distance = 3.590 (1) Å] occur
Bis(2-amino-4-methylpyridinium) bis(pyridine-2,6-dicarboxylato)cuprate(II)
The asymmetric unit of the title compound, (C6H9N2)2[Cu(C7H3NO4)2], contains half of a [Cu(pydc)2]2− (pydcH2 is pyridine-2,6-dicarboxylic acid) anion and one protonated 2-amino-4-methylpyridine (2a4mpH)+ counter-ion. The anion is a six-coordinated complex with a distorted CuN2O4 octahedral geometry around the CuII ion. N—H⋯O and C—H⋯O hydrogen bonds along with π–π contacts between the pyridine rings of the (2a4mpH)+ cations [centroid–centroid distance = 3.573 (2) Å] stabilize the crystal structure
Benzene-1,3-diammonium bis(pyridine-2,6-dicarboxylato)nickelate(II) pentahydrate
In the title compound, (C6H10N2)[Ni(C7H3NO4)2]·5H2O, the NiII ion is six-coordinated by two N and four O atoms from two pyridine-2,6-dicarboxylate ligands in a distorted octahedral fashion. The crystal packing is stabilized by intermolecular O—H⋯O and N—H⋯O and weak C—H⋯O hydrogen bonds and π–π interactions [centroid–centroid distances = 3.4669 (19) and 3.764 (2) Å]
2,2′-Azanediyldiethanaminium pyridine-2,5-dicarboxylate
The crystal structure of the title compound, C4H15N3
2+·C7H3NO4
2−, consists of diethylenetriaminium (2,2′-azanediyldiethanaminium) cations and pyridine-2,5-dicarboxylate anions, which are linked by N—H⋯O, N—H⋯N and C—H⋯O hydrogen bonds. C—H⋯π interactions are also observed. In the anion, the carboxylate groups are oriented at dihedral angles of 11.04 (15) and 6.31 (14)° with respect to the pyridine ring
Bis{2-[(2,4-dimethylphenyl)iminomethyl]pyridine-κ2 N,N′}bis(thiocyanato-κN)cadmium
The title compound, [Cd(NCS)2(C14H14N2)2], features crystallographic inversion symmetry with the CdII ion located on a centre of inversion. The CdII ion is six-coordinated in a slightly distorted octahedral geometry with the thiocyanate anions in axial positions. The angle between the benzene and pyridine rings is 69.64 (9)°. An intermolecular C—H⋯S hydrogen bond stabilizes the crystal structure
Dibromido(2,9-dimethyl-1,10-phenanthroline-κ2 N,N′)zinc
The reaction of equimolar amounts of zinc bromide and 2,9-dimethyl-1,10-phenanthroline in dry methanol provided the title compound, [ZnBr2(C14H12N2)], in good yield. The ZnII ion is coordinated in a distorted tetrahedral environment by two N atoms from the chelating 2,9-dimethyl-1,10-phenanthroline ligand and two bromide ions. There is intermolecular π–π stacking between adjacent phenanthroline units, with centroid–centroid distances of 3.594 (3) and 3.652 (3) Å
Poly[aqua(dimethyl sulfoxide)(μ4-pyridine-2,5-dicarboxylato)calcium(II)]
In the polymeric title compound, [Ca(C7H3NO4)(H2O)(C2H6OS)]n, the CaII ion is coordinated in a distorted pentagonal–bipyramidal CdNO6 geometry. The crystal packing is stabilized by O—H⋯O hydrogen bonds and π–π stacking interactions between the aromatic rings of pyridine-2,5-dicarboxylate with centroid–centroid distances of 3.6166 (13) Å
Dichlorido[2,4-dimethyl-N-(pyridin-2-ylmethylidene)aniline-κ2 N,N′]dimethyltin(IV)
The asymmetric unit of the title compound, [Sn(CH3)2Cl2(C14H14N2)], contains two crystallographically independent molecules. In each molecule, the SnIV atom is six-coordinated in a distorted octahedral geometry by one bidentate 2,4-dimethyl-N-(pyridin-2-ylmethylidene)aniline ligand, two methyl groups and two Cl atoms. In the crystal, intermolecular C—H⋯Cl hydrogen bonds link the molecules. There are π–π contacts between the pyridine rings of the ligands [centroid–centroid distance = 3.761 (4) Å]
Propane-1,2-diaminium bis(pyridine-2,6-dicarboxylato-κ3 O 2,N,O 6)cadmate dihydrate
The reaction of cadmium nitrate dihydrate, propane-1,2-diamine and pyridine-2,6-dicarboxylic acid in a 1:1:2 molar ratio in an aqueous solution resulted in the formation of the title compound, (C3H12N2)[Cd(C7H3NO4)2]·2H2O or (p-1,2-daH2)-[Cd(pydc)2]·2H2O (where p-1,2-da is propane-1,2-diamine and pydcH2 is pyridine-2,6-dicarboxylic acid). The CdII ion is coordinated by four O and two N atoms of two pydc ligands in a distorted octahedral environment. The structure also contains two uncoordinated water molecules. In the crystal, there are several intermolecular N—H⋯O, O—H⋯O and weak C—H⋯O hydrogen bonds. There are also π–π stacking interactions between the pyridine rings of pydc units, with centroid–centroid distances of 3.4708 (16) Å
{4,4′-Dibromo-2,2′-[2,2-dimethylpropane-1,3-diylbis(nitrilomethanylylidene)]diphenolato-κ4 O,N,N′,O′}nickel(II)
In the title compound, [Ni(C19H18Br2N2O2)], the NiII ion, lying on a twofold rotation axis, is coordinated by two N atoms and two O atoms from the Schiff base ligand in a distorted square-planar geometry. Weak intermolecular C—H⋯O hydrogen bonds stabilize the crystal structure
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