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2-Aminoterephthalic acid N,N-dimethylformamide disolvate  [cached]
Stefan Loos,Wilhelm Seichter,Edwin Weber,Florian Mertens
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812031431
Abstract: The asymmetric unit of the title structure, C8H7NO4·2C3H7NO, contains one 2-aminoterephthalic acid and two N,N-dimethylformamide molecules. Strong O—H...O hydrogen bonds between the acidic carboxy H atoms of 2-aminoterephthalic acid and the O atoms of both solvent molecules form linear 1:2 complex units. One H atom of the amine group is involved in intramolecular N—H...O hydrogen bonding, whereas the second one takes part in an intermolecular N—H...O connection. Furthermore, the crystal is stabilized by weak C—H...O hydrogen bonds.
1,4-Bis(benzimidazol-2-yl)benzene dimethylformamide disolvate
De-Hong Wu,Ling Hu
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809004759
Abstract: The aromatic molecule of the title compound, C20H14N4·2C3H7NO, occupies a special position on an inversion center. The benzimidazole unit (planar to within 0.008 ) forms a dihedral angle of 9.1 (2)° with the central benzene ring. The benzimidazole H atom participates in a hydrogen bond with the dimethylformamide solvent molecule, thus giving rise to the title 1:2 aggregate. These aggregates are further linked in the crystal structure by aromatic π–π stacking interactions [centroid–centroid distance = 6.356 (2) ].
1-[4-(Diaminomethyleneaminosulfonyl)phenyliminiomethyl]-2-naphtholate N,N-dimethylformamide disolvate  [cached]
Hoda El-Ghamry,Raafat Issa,Kamal El-Baradie,Keiko Isagai
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808018710
Abstract: The asymmetric unit the title compound, C18H16N4O3S·2C3H7NO, contains a molecule in a zwitterionic form with a deprotonated hydroxyl group and an iminium group, and two dimethylformamide solvent molecules. The dihedral angles of the guanidine group and the naphthyl ring system with respect to the central benzene ring are 76.04 (7) and 3.45 (9)°, respectively. The conformation of the molecule may be influenced, in part, by two intramolecular hydrogen bonds, while in the crystal structure, intermolecular hydrogen bonds form one-dimensional chains along [010].
4,4′-(Anthracene-9,10-diyl)dibenzoic acid dimethylformamide disolvate  [cached]
Hong Li,Zhi-Qiang Wang,Liu-Zhi Yang,Yan-Qi Liu
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809014858
Abstract: In the title compound, C28H18O4·2C3H7NO, the dihedral angle between the benzene rings and the anthracene system is 74.05 (12)°. A crystallographic inversion centre is located in the middle of the anthracene unit. The dimethylformamide solvent molecules are partially disordered over two positions of approximately equal occupancy [0.529 (6):0.471 (6)]. Intermolecular O—H...O hydrogen bonds with the major occupancy formamide O atom as acceptor result in the formation of 2:1 solvate–complex aggregates, which are alternately linked to shorter solvate units via weak intermolecular C—H...O contacts generated from the rotational disorder of the formamide O atom (minor occupancy component). Weak C—H...π interactions between the solvent molecules as the donor and the outer anthracene rings support these contacts in the crystal structure for both disorder components.
Bis{μ-2,2′-[o-phenylenebis(nitrilomethylidyne)]diphenolato}dicopper(II) N,N′-dimethylformamide disolvate
Guofeng Yu,Yu Ding,Li Wang,Zhengbing Fu
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808005394
Abstract: The title compound, [Cu2(C20H14N2O2)2]·2C3H7NO, consists of a centrosymmetric dimer composed of two copper(II) ions and two tetradentate salphen ligands {H2salphen is 2,2′-[o-phenylenebis(nitrilomethylidyne)]diphenol}, and two dimethylformamide solvent molecules. The CuII atom is bonded to two N imino atoms and three phenolate O atoms of salphen. One deprotonated phenol group of each ligand bridges two Cu atoms, forming the dimer. The geometry about the five-coordinate Cu atom can best be described as slightly distorted rectangular pyramidal. The crystal structure is stabilized by π–π interactions [centroid-centroid distance 3.779 (2) ] and C—H...O hydrogen bonds.
N2,N2′-Bis(3-nitrobenzylidene)pyridine-2,6-dicarbohydrazide dimethylformamide disolvate trihydrate
Cuixia Cheng,Haowen Liu
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536807056607
Abstract: In the title compound, C21H15N7O6·2C3H7NO·3H2O, the N2,N2′-bis(3-nitrobenzylidene)pyridine-2,6-dicarbohydrazide and one water molecule are located on a twofold rotation axis. The molecules are connected by hydrogen bonds. One dimethylformamide molecule is disordered over two positions; the site occupancy factors are ca 0.8 and 0.2.
(Salicylato)[tris(1-methyl-1H-benzimidazol-2-ylmethyl)amine]copper(II) perchlorate dimethylformamide disolvate  [cached]
Huilu Wu,Ruirui Yun,Jian Ding,Jingkun Yuan
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536807061661
Abstract: In the title complex, [Cu(C7H5O3)(C27H27N7)]ClO4·2C3H7NO, the CuII ion is five-coordinated by four N atoms from the tris(1-methyl-1H-benzimidazol-2-ylmethyl)amine ligand and an O atom of the monodentate salicylate ligand. The N4O donor set defines a coordination geometry intermediate between square-pyramidal and trigonal–bipyramidal. The crystal structure is stabilized by O—H...O interactions. The atoms of the aromatic ring of the salicylate ligand are disordered over two sites of equal occupancy. In addition, one of the dimethylformamide solvent molecules is partially disordered over two positions, of approximately equal occupancy.
Bis[benzyl N′-(1H-indol-3-ylmethylene)hydrazinecarbodithioato-κ2N′,S]nickel(II) N,N-dimethylformamide disolvate  [cached]
Hamid Khaledi,Hapipah Mohd Ali,Seik Weng Ng
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808038580
Abstract: In the title compound, [Ni(C17H14N3S2)2]·2C3H7NO, the Ni atom (site symmetry overline{1}) is N,S-chelated by two deprotonated Schiff base anions in a distorted square-planar geometry. The dihedral angle between the aromatic ring planes within the ligand is 86.37 (13)°. In the crystal structure, an N—H...O hydrogen bond links the complex to the dimethylformamide solvent molecule.
6-Bromo-3-hydroxy-4-oxo-2-phenyl-4H-chromene-8-carboxylic acid dimethylformamide disolvate  [cached]
Hui-Liang Wen,Dan-Dan Chen,Chong-Bo Liu
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808019454
Abstract: In the title compound, C16H9BrO5·2C3H7NO, the chromene ring system is essentially planar. The two dimethylformamide solvent molecules are linked by intermolecular O—H...O hydrogen bonds to the 6-bromo-3-hydroxy-4-oxo-2-phenyl-4H-chromene-8-carboxylic acid molecules.
Bis{benzyl 3-[(1H-indol-3-yl)methylidene]dithiocarbazato-κ2N3,S}palladium(II) N,N-dimethylformamide disolvate  [cached]
Hamid Khaledi,Hapipah Mohd Ali
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536810051780
Abstract: In the title compound, [Pd(C17H14N3S2)2]·2C3H7NO, the deprotonated Schiff base ligand acts as an N,S-bidentate chelate, forming a five-membered ring with the metal atom. The PdII ion, located on an inversion center, is four-coordinated by two of the Schiff base ligands in a square-planar geometry. In the crystal, the indolic NH groups are bonded to the dimethylformamide (DMF) solvent molecules via an N—H...O interaction. In addition, C—H...S interactions are observed.
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