Coordination behaviour of nicotinamide: an infrared spectroscopic study

Copper(II) complexes of a nonsteroidal anti-inflammatory drug niflumic acid. Synthesis, crystal structure of tetrakis-μ-(2-[3-(trifluoromethyl)phenyl]aminonicotinato)bis(dimethylsulfoxide)dicopper(II) complex at 190 K. Anti-inflammatory properties

The two-dimensional metal–organic framework [Cu(terephthalate)(NHMe2)2] 				(1) has been prepared by solvothermal synthesis and characterised by X-ray diffraction. [1, monoclinic, P21/c, a 				= 10.276(3), b 				= 9.891(2), c 				= 13.244(3) 				A, β 				= 90.573(5)°, V 				= 1346.1(6) 				A3, T 				= 120(5) K, R1 				= 0.065]. The product has arisen as a result of a hydrolysis reaction of the DMF solvent. Compound 1 adopts a compressed 44 network based upon dinuclear Cu2 nodes and is unusual in containing coordinated dimethylamine ligands. The propensity for and consequences of hydrolysis reactions such as this are discussed.

Solvent hydrolysis leads to an unusual Cu(II) metal–organic framework

Spectral properties and bio-activity of copper(II) clofibriates, part III: crystal structure of Cu(clofibriate)2(2-pyridylmethanol)2, Cu(clofibriate)2(4-pyridylmethanol)2(H2O) dihydrate, and Cu2(clofibriate)4(N,N-diethylnicotinamide)2

The synthesis and characterization of [Cu(CH3CCl2CO2)2(3-mpyc)2] (1) (3-mpyc = methyl-3-pyridylcarbamate) and [Cu(CH3CHBrCO2)2(2-pyme)2] (2) (2-pyme = 2-pyridylmethanol) are reported. The compounds under study were characterized by IR, electronic spectroscopy and X-ray analysis. The molecular structure of both Complexes 1 and 2 is mononuclear. The coordination environment around each copper(II) atom is a distorted tetragonal bipyramid.

Copper(ii) halogenopropionates: low-temperature crystal and molecular structure of bis(2,2-dichloropropionato)-di(methyl-3-pyridylcarbamate)copper(ii) and bis(2-bromopropionato)-di (2-pyridylmethanol)copper(ii)

The binuclear centrosymmetric zinc complex in the title compound, [Zn2(C7H5O3)4(C10H14N2O)2].2H2O, contains four benzoate ligands, two of which bridge the two Zn atoms [Zn⋯Zn' 6.685 (5) A] and two of which coordinate as monodentate ligands. Each Zn atom is coordinated by three O atoms and an N atom from an N,N-diethylnicotinamide ligand with slightly distorted tetrahedral coordination geometry. The water molecules are hydrogen bonded to the nicotinamide O atoms [O⋯O 2.756 (4) A].

Bis(μ‐4‐hydroxybenzoato‐O:O')bis[(N,N‐diethylnicotinamide‐N1)(4‐hydroxybenzoato‐O)zinc(II)] Dihydrate

The title cobalt complex, [Co(C7H4NO4)2(C6H6N2O)2(H2O)2], is monomeric and centrosymmetric, and contains two water molecules, two 4-nitrobenzoate and two nicotinamide (NA) ligands, all acting as monodentate ligands. The four nearest O atoms around the Co atom form a slightly distorted square-planar arrangement, with a distorted octahedral coordination completed by the pyridine N atoms of the NA ligand at a distance of 2.134 (2) A. The water molecules are hydrogen bonded to the carboxyl O atoms [O⋯O 2.634 (5) A].

trans-Diaquabis(nicotinamide-N1)bis(4-nitrobenzoato-O)cobalt(II)

The title molecule, [Cu(C 7 H 5 O 2 ) 2 (C 10 H 14 N 2 O) 2 ], is a crystallographically centrosymmetric mononuclear complex. The two benzoate ions are coordinated to the Cu atom as bidentate ligands. The N and nearest O atoms form a square-planar arrangement around the Cu atom, with the tetragonally distorted octahedral coordination completed by the remaining two carboxylate O atoms.

trans‐Bis(benzoato‐O,O')bis(N,N‐diethylnicotinamide‐N1)copper(II)

The title molecule, [Cu 2 (C 6 H 5 COO) 4 (C 10 H 14 N 2 O) 2 ], is a crystallographically centrosymmetric binuclear complex, with Cu atoms [Cu...Cu' = 2.613(1)A] bridged by four benzoate ligands. The four nearest O atoms around each Cu atom form a square-planar arrangement with the square-pyramidal coordination completed by the pyridine N atom of the N,N-diethylnicotinamide ligand at a distance of 2.162(6)A. Each Cu atom is displaced by 0.190(1)A from the plane of the four O atoms, with an average Cu-O distance of 1.974(6)A.

Tetrakis(μ‐benzoato‐O:O')bis(N,N‐diethylnicotinamide‐N')dicopper(II)

# 2007 International Union of Crystallography All rights reserved The title Mn complex, [Mn(C9H10NO2)2(H2O)4] 2H2O, is monomeric and centrosymmetric. It contains two 4-dimethylaminobenzoate ligands, four coordinated and two uncoordinated 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 water O atoms in the axial positions. In the crystal structure, intraand intermolecular O—H O hydrogen bonds link the molecules into chains.

T. Hökelek

Papers

Bis(μ‐4‐hydroxybenzoato‐O:O')bis[(N,N‐diethylnicotinamide‐N1)(4‐hydroxybenzoato‐O)zinc(II)] Dihydrate

trans-Diaquabis(nicotinamide-N1)bis(4-nitrobenzoato-O)cobalt(II)

trans‐Bis(benzoato‐O,O')bis(N,N‐diethylnicotinamide‐N1)copper(II)

Tetrakis(μ‐benzoato‐O:O')bis(N,N‐diethylnicotinamide‐N')dicopper(II)

Tetraaquabis[4-(dimethylamino)benzoato-κO]manganese(II) dihydrate