Diaqua­bis(4-methyl­amino­benzoato-κO)bis­(nicotinamide-κN 1)nickel(II)

The title NiII complex, [Ni(C8H8NO2)2(C6H6N2O)2(H2O)2], is centrosymmetric with the Ni atom on an inversion center. The mol­ecule contains two 4-methyl­amino­benzoate (MAB) and two nicotinamide (NA) ligands and two coordinated water mol­ecules, all ligands being monodentate. The four O atoms in the equatorial plane around the Ni atom 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 2.09 (14)°, while the pyridine and benzene rings are oriented at a dihedral angle of 66.15 (4)°. In the crystal structure, inter­molecular O—H⋯O and N—H⋯O hydrogen bonds link the mol­ecules into a three-dimensional network

Diaqua­bis(N,N-diethyl­nicotinamide-κN 1)bis­(4-formyl­benzoato-κO 1)manganese(II)

The title compound, [Mn(C8H5O3)2(C10H14N2O)2(H2O)2], contains one MnII atom lying on an inversion centre, two 4-formyl­benzoate and two diethyl­nicotinamide ligands and two coordinated water mol­ecules. All ligands are monodentate. The four O atoms around the Mn atom form a slightly distorted equatorial plane, while the distorted octa­hedral coordination is completed by the two N atoms in the axial positions. An intra­molecular O—H⋯O hydrogen bond occurs in the complex. In the crystal structure, O—H⋯O hydrogen bonds link the mol­ecules through an R 2 2(16) ring motif, forming a one-dimensional chain along the a axis. The π–π contact between the pyridyl rings [centroid–centroid distance = 3.629 (2) Å] may further stabilize the structure

Diaqua­bis(2-bromo­benzoato-κO)bis­(N,N-diethyl­nicotinamide-κN 1)zinc(II)

In the centrosymmetric title complex, [Zn(C7H4BrO2)2(C10H14N2O)2(H2O)2], the ZnII atom is located on an inversion center. The asymmetric unit contains one 2-bromo­benzoate (BB), one diethyl­nicotinamide (DENA) ligand and one coordinating water molecule. The four O atoms in the equatorial plane around the Zn atom form a slightly distorted square-planar arrangement, while the slightly distorted octa­hedral coordination is completed by the two N atoms of the DENA ligands in the axial positions. The dihedral angle between the carboxyl group and the adjacent benzene ring is 85.51 (12)°, while the pyridine and benzene rings are oriented at a dihedral angle of 44.07 (6)°. In the crystal structure, O—H⋯O hydrogen bonds link the mol­ecules into infinite chains

9-Benzyl-9H-carbazole

The asymmetric unit of the title compound, C19H15N, contains two crystallographically independent mol­ecules. In both mol­ecules, the planar carbazole moieties [maximum deviations = 0.037 (4) and 0.042 (3) Å] are oriented with respect to the adjacent benzene rings, at dihedral angles of 85.29 (8) and 89.89 (7)°, respectively. In the crystal structure, weak C—H⋯π inter­actions are observed involving the carbazole rings

Diaqua­bis(N,N-diethyl­nicotinamide-κN 1)bis­(4-formyl­benzoato-κO)nickel(II)

In the title centrosymmetric mononuclear NiII compound, [Ni(C8H5O3)2(C10H14N2O)2(H2O)2], the central NiII atom is coordinated by two O atoms from two 4-formyl­benzoate (FOB) ligands, two O atoms from two water mol­ecules and two N atoms from two diethyl­nicotinamide (DENA) ligands. The coordination geometry is slightly distorted octa­hedral, with four O atoms in the equatorial plane and two N atoms in axial positions. Intra­molecular O—H⋯O hydrogen bonds are observed. In the crystal structure, mol­ecules are linked into chains along the a axis by inter­molecular O—H⋯O hydrogen bonds. The structure is further stabilized by π–π inter­actions between the pyridine rings of DENA units, with a centroid–centroid distance of 3.668 (2) Å

Bis[μ-4-(methyl­amino)­benzoato]-κ3 O,O′:O;κ3 O:O,O′-bis­{aqua­[4-(methyl­amino)­benzoato-κ2 O,O′](nicotinamide-κN)cadmium(II)}

In the dinuclear centrosymmetric CdII compound, [Cd2(C8H8NO2)4(C6H6N2O)2(H2O)2], the metal atom is chelated by two carboxyl­ate groups from 4-(methyl­amino)­benzoate (PMAB) anions, and coordinated by one nicotinamide and one water mol­ecule; a carboxyl­ate O atom from the adjacent PMAB anion bridges to the Cd atom, completing the irregular seven-coordination geometry. In the crystal, inter­molecular 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 pyridine rings [centroid–centroid distance = 3.965 (1) Å] may further stabilize the structure. A weak C—H⋯π inter­action also occurs

Diaqua­bis(2-bromo­benzoato-κO)bis­(N,N-diethyl­nicotinamide-κN 1)manganese(II)

The title MnII complex, [Mn(C7H4BrO2)2(C10H14N2O)2(H2O)2], is centrosymmetric. The mol­ecule contains two 2-bromo­benzoate (BB) and two diethyl­nicotinamide (DENA) ligands and two water mol­ecules, all ligands being monodentate. The four O atoms in the equatorial plane around the Mn atom form a slightly distorted square-planar arrangement, while the distorted octa­hedral coordination is completed by the two N atoms of the DENA ligands in the axial positions. The dihedral angle between the carboxyl group and the adjacent benzene ring is 79.95 (11)°, while the pyridine and benzene rings are oriented at a dihedral angle of 45.66 (6)°. In the crystal structure, inter­molecular O—H⋯O hydrogen bonds link the mol­ecules into infinite chains

Ethyl 4-hydr­oxy-9-tosyl-9H-carbazole-3-carboxyl­ate

In the title compound, C22H19NO5S, the carbazole skeleton is nearly planar [maximum deviation = 0.043 (1) Å] with the pyrrole ring oriented at dihedral angles of 2.32 (6) and 1.77 (6)° with respect to the adjacent benzene rings. The dihedral angle between the benzene ring of the tosyl group and the carbazole skeleton is 82.25 (5)°. Intra­molecular O—H⋯O hydrogen bonding results in the formation of a planar six-membered ring, which is oriented at a dihedral angle of 3.06 (4)° with respect to the adjacent carbazole skeleton. In the crystal structure, weak inter­molecular C—H⋯O inter­actions link the mol­ecules into infinite chains and π–π contacts between the benzene rings and between the pyrrole and benzene rings [centroid–centroid distances = 3.374 (1) and 3.730 (1) Å, respectively] may further stabilize the structure. A weak C—H⋯π inter­action is also present

Bis(μ-3-hy­droxy­benzoato)-κ3 O 1,O 1′:O 1;κ3 O 1:O 1,O 1′-bis­[(3-hy­droxy­benzoato-κ2 O,O′)(iso­nicotinamide-κN 1)cadmium] tetra­hydrate

In the title centrosymmetric binuclear CdII compound, [Cd2(C7H5O3)4(C6H6N2O)2]·4H2O, the six-coordinated CdII atom is chelated by the carboxyl­ate groups of the two 3-hy­droxy­benzoate (HB) anions; the two monomeric units are bridged through the two O atoms of the two carboxyl­ate groups. In the crystal, 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 pyridine rings and between the benzene rings [centroid-centroid distances = 3.770 (1), 3.769 (1) and 3.632 (1) Å] may further stabilize the structure

Diaqua­bis(2-chloro­benzoato-κO)bis­(N,N-diethyl­nicotinamide-κN 1)manganese(II)

In the monomeric title complex, [Mn(C7H4ClO2)2(C10H14N2O)2(H2O)2], the MnII atom is located on a crystallographic centre of inversion. The asymmetric unit contains one 2-chloro­benzoate (CB) ligand, one diethyl­nicotinamide (DENA) ligand and one coordinated water mol­ecule, all ligands being monodentate. The four O atoms in the equatorial plane around the Mn atom form a slightly distorted square-planar arrangement, while the slightly distorted octa­hedral coordination is completed by the two pyridine N atoms of the DENA ligands in the axial positions. The dihedral angle between the carboxyl group and the adjacent benzene ring is 77.9 (11)°, while the pyridine and benzene rings are oriented at a dihedral angle of 45.94 (5)°. In the crystal structure, inter­molecular O—H⋯O hydrogen bonds link the mol­ecules into infinite chains