نتایج جستجو برای: dimethyl formamide pulping

تعداد نتایج: 28423  

2009
Yu-Fen Liu Hai-Tao Xia Da-Qi Wang Xiao-Lin Gong

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 ...

2011
Nuan-Sheng Wang Yong-Tao Wang Xiu-Kai Guo Tian-Duo Li

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...

Journal: :European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences 2003
Garima Chawla Piyush Gupta R Thilagavathi Asit K Chakraborti Arvind K Bansal

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...

2011
Aamer Saeed Ulrich Flörke

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...

2011
Kouassi Ayikoé Ray J. Butcher Yilma Gultneh

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 ...

2010
Hamid Khaledi Hapipah Mohd Ali

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...

2011
Qijun Zhang Handong Yin Daqi Wang

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...

2010
Hao Wang Shi-Jie Li Wen-Dong Song Xiao-Fei Li Dong-Liang Miao

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...

2009
Yan-Qiu Dang

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...

2008
Ming-Xiong Tan Zhen-Feng Chen Zhou Neng Hong Liang

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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