Vedat Adıgüzel

NaCl+NaH2PO2+H2O Üçlü Sisteminin 333 K’de Çözünürlük ve Fizikokimyasal Özellik Değişimlerinin İncelenmesi

NaCl+NaH 2 PO 2 +H 2 O uclu sisteminin 333 K’de kati-sivi denge verileri ve fizikokimyasal ozellikleri izotermal yontem kullanilarak arastirilmistir. Kati faz bilesimleri Schreinemaker yontemi ile belirlenmistir. NaCl+NaH 2 PO 2 +H 2 O uclu sisteminin basit otonik yapiya sahip oldugu tespit edilmistir. Faz egrisinde, bir otonik nokta, iki invariant egrisi ve iki kristallenme bolgesi gorulmustur. Kristallenme bolgelerinde NaCl ve NaH 2 PO 2 .H2O yapilari tespit edilmistir. NaCl+NaH 2 PO 2 +H 2 O uclu sisteminde NaH 2 PO 2 ’in NaCl uzerine salting-out (cozeltiden tuz uzaklastirma) etkisi gozlenmistir.

Aqua-bis-(4-fluoro-benzoato-κO)bis-(nicotinamide-κN)copper(II) nicotinamide hemisolvate trihydrate.

The asymmetric unit of the title compound, [Cu(C7H4FO2)2(C6H6N2O)2(H2O)]·0.5C6H6N2O·3H2O, contains two aquabis(4-fluorobenzoato)bis(nicotinamide)copper(II) molecules, one nicotinamide solvent molecule and six water molecules. The CuII ion is coordinated by two O atoms from two 4-fluorobenzoate ligands, two N atoms from two nicotinamide ligands and one water O atom in a distorted square-pyramidal geometry. In the crystal, O—H⋯O, O—H⋯N and N—H⋯O hydrogen bonds consolidate the crystal packing, which also exhibits π–π interactions between the aromatic rings [centroid–centroid distances 3.692 (2)–3.794 (2) Å].

Diaqua­bis­(4-bromo­benzoato-κO)bis­(N,N-diethyl­nicotinamide-κN 1)copper(II)

The title CuII complex, [Cu(C7H4BrO2)2(C10H14N2O)2(H2O)2], contains two 4-bromobenzoate (PBB), two diethylnicotinamide (DENA) monodentate ligands and two water molecules. The four O atoms in the equatorial plane around the CuII ion form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by two N atoms of the DENA ligands in the axial positions. Intramolecular O—H⋯O hydrogen bonds link the water molecules to the carboxylate groups. The dihedral angles between the carboxylate groups and the adjacent benzene rings are 3.1 (3) and 3.74 (17)°, while the pyridine rings and the benzene rings are oriented at dihedral angles of 6.81 (10) and 3.38 (12)°. In the crystal, intermolecular O—H⋯O hydrogen bonds link the molecules into double chains along the b axis. C—H⋯O interactions are also observed. π–π contacts between pyridine rings [centroid–centroid distance = 3.485 (2) Å] may further stabilize the crystal structure.

Diaqua­bis­(4-bromo­benzoato-κO)bis­(N,N-diethyl­nicotinamide-κN1)copper(II)

The title CuII complex, [Cu(C7H4BrO2)2(C10H14N2O)2(H2O)2], contains two 4-bromobenzoate (PBB), two diethylnicotinamide (DENA) monodentate ligands and two water molecules. The four O atoms in the equatorial plane around the CuII ion form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by two N atoms of the DENA ligands in the axial positions. Intramolecular O—H⋯O hydrogen bonds link the water molecules to the carboxylate groups. The dihedral angles between the carboxylate groups and the adjacent benzene rings are 3.1 (3) and 3.74 (17)°, while the pyridine rings and the benzene rings are oriented at dihedral angles of 6.81 (10) and 3.38 (12)°. In the crystal, intermolecular O—H⋯O hydrogen bonds link the molecules into double chains along the b axis. C—H⋯O interactions are also observed. π–π contacts between pyridine rings [centroid–centroid distance = 3.485 (2) Å] may further stabilize the crystal structure.

Diaqua­bis­(N,N′-diethyl­nicotinamide-κN1)bis­(4-fluoro­benzoato-κO)copper(II)

The asymmetric unit of the title mononuclear CuII complex, [Cu(C7H4FO2)2(C10H14N2O)2(H2O)2], contains one-half of the molecule. The CuII ion is located on an inversion centre, and is coordinated by two N atoms from two diethylnicotinamide ligands, two O atoms from two 4-fluorobenzoate (PFB) ligands and two water molecules in a distorted octahedral geometry. In the PFB ligand, the carboxylate group is twisted at an angle of 2.10 (14)° from the attached benzene ring. In the crystal structure, intermolecular O—H⋯O hydrogen bonds link molecules related by translation along the a axis into chains. Weak intermolecular C—H⋯O hydrogen bonds and π–π interactions between the pyridine rings of neighbouring molecules [centroid-to-centroid distance = 3.571 (2) Å] further consolidate the crystal packing.

Diaqua­bis­(N,N′-diethyl­nicotinamide-κN 1)bis­(4-fluoro­benzoato-κO)copper(II)

The asymmetric unit of the title mononuclear CuII complex, [Cu(C7H4FO2)2(C10H14N2O)2(H2O)2], contains one-half of the molecule. The CuII ion is located on an inversion centre, and is coordinated by two N atoms from two diethylnicotinamide ligands, two O atoms from two 4-fluorobenzoate (PFB) ligands and two water molecules in a distorted octahedral geometry. In the PFB ligand, the carboxylate group is twisted at an angle of 2.10 (14)° from the attached benzene ring. In the crystal structure, intermolecular O—H⋯O hydrogen bonds link molecules related by translation along the a axis into chains. Weak intermolecular C—H⋯O hydrogen bonds and π–π interactions between the pyridine rings of neighbouring molecules [centroid-to-centroid distance = 3.571 (2) Å] further consolidate the crystal packing.

trans-Diaqua-bis-(4-fluoro-benzoato-κO)bis-(nicotinamide-κN)nickel(II).

In the mononuclear NiII title complex, [Ni(C7H4FO2)2(C6H6N2O)2(H2O)2], the NiII atom, located on an inversion center, is coordinated by two nicotinamide and two 4-fluorobenzoate ligands and two water molecules in a distorted N2O4 octahedral geometry. The dihedral angle between the carboxylate group and the adjacent benzene ring is 8.95 (8)°, while the pyridine ring and the benzene ring are oriented at a dihedral angle of 75.01 (7)°. The water molecule links the adjacent carboxylate O atom via an intramolecular O—H⋯O hydrogen bond. In the crystal, O—H⋯O, N—H⋯O, C—H⋯O and C—H⋯F hydrogen bonds link the molecules into a three-dimensional network. π–π stacking between parallel pyridine rings [centroid–centroid distance = 3.7287 (11) Å] is also observed.

Di-μ-nicotinamide-κ2N1:O;κ2O:N1-bis[aquabis(4-bromobenzoato)-κO;κ2O,O′-manganese(II)]

In the centrosymmetric dinuclear title compound, [Mn2(C7H4BrO2)4(C6H6N2O)2(H2O)2], the MnII atom is coordinated by one N atom from one bridging nicotinamide ligand and one O atom from another symmetry-related bridging nicotinamide ligand, three O atoms from two 4-bromobenzoate ligands and one water molecule in a distorted octahedral geometry. The dihedral angles between the carboxylate groups and the adjacent benzene rings are 10.89 (16) and 8.4 (2)°, while the benzene rings are oriented at a dihedral angle of 6.09 (13)°. Intermolecular O—H⋯O, N—H⋯O and weak C—H⋯O hydrogen bonds link the molecules into a three-dimensional network. π–π interactions, indicated by short centroid–centroid distances [3.845 (2) Å between the benzene rings, 3.650 (2) Å between the pyridine rings and 3.700 (3) Å between the benzene and pyridine rings] further stabilize the structure.

Di-μ-nicotinamide-κ2 N 1:O;κ2 O:N 1-bis­[aqua­bis­(4-bromo­benzoato)-κO;κ2 O,O′-manganese(II)]

In the centrosymmetric dinuclear title compound, [Mn2(C7H4BrO2)4(C6H6N2O)2(H2O)2], the MnII atom is coordinated by one N atom from one bridging nicotinamide ligand and one O atom from another symmetry-related bridging nicotinamide ligand, three O atoms from two 4-bromobenzoate ligands and one water molecule in a distorted octahedral geometry. The dihedral angles between the carboxylate groups and the adjacent benzene rings are 10.89 (16) and 8.4 (2)°, while the benzene rings are oriented at a dihedral angle of 6.09 (13)°. Intermolecular O—H⋯O, N—H⋯O and weak C—H⋯O hydrogen bonds link the molecules into a three-dimensional network. π–π interactions, indicated by short centroid–centroid distances [3.845 (2) Å between the benzene rings, 3.650 (2) Å between the pyridine rings and 3.700 (3) Å between the benzene and pyridine rings] further stabilize the structure.