نتایج جستجو برای: dimethyl formamide pulping
تعداد نتایج: 28423 فیلتر نتایج به سال:
The asymmetric unit of the title complex, [Ni(C(16)H(20)N(2))(2)(H(2)O)(2)]Cl(2)·C(3)H(7)NO, consists of two Ni(II) atoms, each lying on an inversion center, two Cl anions, two N,N'-dibenzyl-ethane-1,2-diamine ligands, two coordinated water mol-ecules and one N,N-dimethyl-formamide solvent mol-ecule. Each Ni(II) atom is six-coordinated in a distorted octa-hedral coordination geometry, with the ...
The title compound, C(34)H(40)N(2)O(4)·2C(3)H(7)NO, was synthesized by the Mannich condensation of ethane-diamine, formaldehyde and p-cresol. In the crystal, the tetra-phenol mol-ecule is arranged around an inversion center. The mol-ecule and the dimethyl-formamide solvate are linked through an O-H⋯O hydrogen bond. An intra-molecular O-H⋯N hydrogen bond occurs in the tetra-phenol mol-ecule, whi...
This study deals with the generation and characterization of various solid-state forms of celecoxib, a selective cyclooxygenase-2 (COX-2) inhibitor. The drug was subjected to polymorphic screen using different solvents to explore the possibility of existence of different solid forms. N,N-Dimethyl acetamide (DMA) and N,N-dimethyl formamide (DMF) yielded solvates in 1:1 stoichiometric ratio. Quen...
The base catalyzed intramolecular nucleophilic cyclization of 1-(2-bromobenzoyl)-3-(2-fluorophenyl)thiourea (1) in the presence of N,N-dimethyl formamide (DMF) afforded the 1-(3-fluorophenyl)-2-thioxo-2,3-dihydroquinazolin-4(1H)-one (2) by an intramolecular nucleophilic substitution SNAr mechanism. The structure was supported by the spectroscopic data and unambiguously confirmed by the single c...
In the title compound, [Ni(C(18)H(18)N(2)O(4))]·C(3)H(7)NO, the central Ni(II) atom is in a square-planar O(2)N(2) coordination environment. The planar Ni-salen moieties (r.m.s. deviation for the plane through the conjugated part of the Ni-salen group = 0.07 Å) form parallel stacks in the a-axis direction, with alternating Ni⋯Ni separations of 3.5339 (7) and 3.6165 (7) Å. In the crystal, there ...
In the title compound, [Pd(C(17)H(14)N(3)S(2))(2)]·2C(3)H(7)NO, the deprotonated Schiff base ligand acts as an N,S-bidentate chelate, forming a five-membered ring with the metal atom. The Pd(II) 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 dimethyl-formamide (DMF) s...
The title compound, [Sn(2)(CH(3)O)(2)Cl(6)(C(3)H(7)NO)(2)], contains two hexa-coordinated Sn(IV) atoms symmetrically bridged by two deprotonated methanol ligands, with an inversion center in the middle of the planar Sn(2)O(2) ring. The other sites of the distorted octa-hedral coordination geometry of the Sn(IV) atom are occupied by three Cl atoms and one O atom from a dimethyl-formamide mol-ecu...
In the title compound, {[Cd(C(9)H(4)N(2)O(4))(C(3)H(7)NO)(H(2)O)]·2H(2)O}(n), the Cd(II) atom is coordinated by one N atom and three O atoms from four different 1H-benzimidazole-5,6-dicarboxyl-ate (Hbidc) ligands, one O atom from one dimethyl-formamide ligand, and one O atom from a water mol-ecule in a distorted octa-hedral geometry. The Hbidc ligands connect the Cd atoms into a two-dimensional...
The Ni atom of the title complex, [Ni(C(8)H(8)NO(3))(2)]·2C(3)H(7)NO, lies on a center of inversion in a square-planar N(2)O(2) coordination environment. An intra-molecular O-H⋯O hydrogen bond exists between the oximic hydr-oxy group of one ligand and the metal-coordinated O atom of the symmetry-related ligand. The dimethyl-formamide solvent mol-ecules are connected to the phenolate groups of t...
In the title complex, [Cu(C(16)H(11)Cl(2)NO(4))(C(3)H(7)NO)] , the Cu(II) atom is coordinated by two O atoms and one N atom from the tridentate ligand L(2-) {LH(2) = (2S)-[2-(3,5-dichloro-2-hydroxy-benzyl-idene)-imino]-3-(4-hydroxy-phenyl)propionic acid} and one O atom from a dimethyl-formamide mol-ecule, resulting in a slightly distorted square-planar geometry. The structure forms a one-dimens...
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