Mustafa Sertçelik

Tetra-aqua-bis(isonicotinamide-κN)cobalt(II) bis-(4-formyl-benzoate) dihydrate.

The asymmetric unit of the crystal structure of the title complex, [Co(C6H6N2O)2(H2O)4](C8H5O3)2·2H2O, contains one-half of the complex cation with the CoII ion located on an inversion center, a 4-formylbenzoate (FB) counter-anion and an uncoordinated water molecule. The four O atoms in the equatorial plane around the CoII ion form a slightly distorted square-planar arrangement with an average Co—O bond length of 2.086 Å; the slightly distorted octahedral coordination is completed by the two N atoms of the isonicotinamide (INA) ligands at a slightly longer distance [2.1603 (14) Å] in the axial positions. The dihedral angle between the carboxylate group and the attached benzene ring is 5.93 (13)°, while the pyridine and benzene rings are oriented at a dihedral angle of 3.09 (6)°. In the crystal structure, O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds link the molecules into a three-dimensional network. π–π Contacts between the benzene and pyridine rings [centroid–centroid distance = 3.758 (1) Å] may further stabilize the crystal structure.

catena-Poly[[(4-formyl-benzoato-κO)(isonicotinamide-κN)zinc(II)]-μ-4-formyl-benzoato-κO:O].

In the title compound, [Zn(C8H5O3)2(C6H6N2O)]n, the ZnII ion is tetrahedrally coordinated by two formylbenzoate (FB) and one isonicotinamide (INA) ligands while symmetry-related FB ligands bridge adjacent ZnII ions, forming polymeric chains along the b axis. The carboxylate groups in the two FB ions are twisted away from the attached benzene ring by 9.07 (2) and 26.2 (2)°. The two benzene rings of the FB ions are oriented at a dihedral angle of 81.30 (5)°. In the crystal, adjacent polymeric chains interact via N—H⋯O and C—H⋯O hydrogen bonds, π–π contacts between the formylbenzoate rings [centroid–centroid distance = 3.7736 (8) Å] and weak C—H⋯π interactions, forming a three-dimensional network.

Tetraaquabis(isonicotinamide-κN1)cobalt(II) bis(4-formylbenzoate) dihydrate

The asymmetric unit of the title complex, [Ni(C6H6N2O)2(H2O)4](C8H5O3)2·2H2O, contains one-half of the complex cation with the NiII atom located on an inversion center, a 4-formylbenzoate (FB) counter-anion and an uncoordinated water molecule. The four O atoms in the equatorial plane around the Ni atom form a slightly distorted square-planar arrangement and the slightly distorted octahedral coordination is completed by the two N atoms of the isonicotinamide (INA) ligands at a sligthly longer distance in the axial positions. The dihedral angle between the carboxylate group and the attached benzene ring is 8.14 (11)°, while the pyridine and benzene rings are oriented at a dihedral angle of 3.46 (6)°. In the crystal structure, O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds link the molecules into a three-dimensional network. π–π Contacts between the benzene and pyridine rings [centroid–centroid distance = 3.751 (1) Å] may further stabilize the crystal structure.

Diaqua­bis­(4-formyl­benzoato-κO1)bis­(nicotinamide-κN1)zinc

In the title complex, [Zn(C8H5O3)2(C6H6N2O)2(H2O)2], the ZnII cation is located on an inversion center and is coordinated by two 4-formylbenzoate (FB) anions, two nicotinamide (NA) ligands and two water molecules. The four O atoms in the equatorial plane around the ZnII cation form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by the two N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxylate group and the adjacent benzene ring is 24.13 (8)°, while the pyridine ring and the benzene ring are oriented at a dihedral angle of 88.52 (4)°. The coordinating water molecule links with the carboxylate group via an O—H⋯O hydrogen bond. In the crystal, N—H⋯O and O—H⋯O hydrogen bonds, and a weak C—H⋯π interaction link the molecules into a two-dimensional network parallel to (010). These networks are linked via C—H⋯O and π–π interactions between inversion-related benzene rings [centroid–centroid distance = 3.8483 (7) Å], forming a three-dimensional supramolecular structure.

Diaqua­bis­(4-formyl­benzoato-κO1)bis­(nicotinamide-κN1)copper(II)

In the title complex, [Cu(C8H5O3)2(C6H6N2O)2(H2O)2], the CuII cation is located on an inversion center and is coordinated by two 4-formylbenzoate (FB) anions, two nicotinamide (NA) ligands and two water molecules in an elongated distorted octahedral geometry. The dihedral angle between the carboxylate group and the adjacent benzene ring is 23.00 (10)°, while the pyridine ring and the benzene ring are oriented at a dihedral angle of 85.34 (4)°. An intramolecular O—H⋯O hydrogen bond occurs between coordinating water molecule and the carboxylate group. In the crystal, N—H⋯O, O—H⋯O and weak C—H⋯O hydrogen bonds link the molecules into a three-dimensional supramolecular network. A weak C—H⋯π interaction also occurs in the crystal.

Diaquabis(4-formylbenzoato-κO1)bis(nicotinamide-κN1)cobalt(II)

In the title complex, [Co(C8H5O3)2(C6H6N2O)2(H2O)2], the CoII cation is located on an inversion center and is coordinated by two 4-formylbenzoate (FB) anions, two nicotinamide (NA) ligands and two water molecules. The four O atoms in the equatorial plane around the CoII cation form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by the two N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxylate group and the adjacent benzene ring is 23.91 (9)°, while the pyridine and benzene rings are oriented at a dihedral angle of 88.84 (4)°. The coordinating water molecule links with the carboxylate group via an intramolecular O—H⋯O hydrogen bond. In the crystal, N—H⋯O, O—H⋯O and weak C—H⋯O hydrogen bonds link the molecules into a three-dimensional supramolecular network. π–π stacking between the parallel benzene rings of adjacent molecules [centroid–centroid distance = 3.8505 (8) Å] may further stabilize the structure. A weak C—H⋯π interaction also occurs in the crystal.

Crystal structure and Hirshfeld surface analysis of hexa­kis­(μ-benzoato-κ2O:O′)bis­(pyridine-3-carbo­nitrile-κN1)trizinc(II)

The asymmetric unit of the title complex contains one half of the complex molecule, one and a half ZnII cations, three benzoate (Bnz) and one pyridine-3-carbonitrile (CPy) molecule; the Bnz anions act as bidentate ligands through the carboxylate O atoms, while the Cpy anion acts as a monodentate N(pyridine)-bonding ligand. The complete centrosymmetric trinuclear complex thus comprises a linear array of three ZnII cations. In the crystal, the Bnz anions link to the Cpy N atoms via weak C—H⋯N hydrogen bonds, forming a two-dimensional network. The Hirshfeld surface analysis confirms the role of H-atom contacts in establishing the packing.

Crystal structure of trans-di­aqua­bis­(4-cyano­benzoato-κO)bis­(N,N-di­ethyl­nicotinamide-κN)cadmium

The CdII atom in the title complex, [Cd(C10H14N2O)2(C8H4NO2)2(H2O)2], is located on an inversion centre and is coordinated by an N2O4 donor set from pairs of water, 4-cyanobenzoate and N,N-diethylnicotinamide ligands.

Crystal structure oftrans-diaquabis(4-cyanobenzoato-κO)bis(N,N-diethylnicotinamide-κN)cadmium

In the crystal, the title centrosymmetric ZnII complex molecules are linked by O—H⋯O hydrogen bonds into supramolecular chains propagating along the [110] direction.

Bis(μ-4-formylbenzoato-κ2O:O′)bis[(4-formylbenzoato-κ2O,O′)bis(isonicotinamide-κN1)copper(II)]

The asymmetric unit of the centrosymmetric dinuclear title compound, [Cu2(C8H5O3)4(C6H6N2O)4], contains one half of the complex mol-ecule. The Cu(II) atoms are bridged by the carboxyl-ate groups of two 4-formyl-benzoate (FOB) anions. Besides the two bridging FOB anions, one additional chelating FOB anion and two isonicotinamide (INA) ligands complete the distorted CuN2O4 octa-hedral coordination of each Cu(2+) cation. Within the asymmetric unit, the benzene and pyridine rings are oriented at dihedral angles of 25.1 (3) and 12.6 (3)°, respectively. In the crystal, N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network. π-π contacts between the pyridine rings [shortest centroid-centroid distance = 3.821 (3) Å] may further stabilize the crystal structure. One of the formyl groups of the two FOB anions is disordered over two sets of sites with an occupancy ratio of 0.65:0.35.