نتایج جستجو برای: tetra n

تعداد نتایج: 981770  

2010
Grzegorz Dutkiewicz B. P. Siddaraju H. S. Yathirajan M. S. Siddegowda Maciej Kubicki

In the title compound, C(11)H(14)ClNO, the piperidine ring adopts a chair conformation: the hydroxyl substituent and the N-bound H atom occupy the axial positions, while the benzene ring occupies the equatorial position. In the crystal, the mol-ecules are linked into a centrosymmetric tetra-mer through strong O-H⋯N and weak N-H⋯O hydrogen bonds; the N and O atoms act as both donor and acceptor ...

2008
Simon J. Coles Abdurrahman Sengul Ozgur Kurt Safinaz Altin

A discrete neutral Cu(II) complex, [Cu(CF(3)SO(3))(2)(C(16)H(18)N(4))], has been derived from the symmetrical tetra-dentate Schiff base, N,N'-bis-[1-(pyridin-2-yl)ethyl-idene]ethane-1,2-diamine. The copper centre assumes a tetra-gonally distorted pseudo-octa-hedral geometry with the O atoms of two trifluoro-methane-sulfonate anions coordinated weakly in the axial positions. The Cu-N distances l...

2012
Guang-Chuan Ou Xian-You Yuan Zhi-Zhang Li

In the title compound, {[NiWO(4)(C(16)H(36)N(4))]·4H(2)O}(n), the Ni(II) ion lies on an inversion center and is octahedrally coordinated by four N atoms of the tetradentate macrocyclic 5,5,7,12,12,14-hexa-methyl-1,4,8,11-tetra-aza-cyclo-tetra-decane (L) ligand in the equatorial plane and two O atoms of [WO(4)](2-) anions in axial positions. Each [WO(4)](2-) anion bridges two adjacent [NiL](2+) ...

Journal: :MATEC web of conferences 2021

The energy profiles of various configurations the tetra-n-butylammonium ion (Bu 4 N + ) arising by changing angle between a pair butyl ligands, as well rotating alkyl fragments in gas phase, were calculated using DFT methods. A hypothesis about most probable way conformations ions during phase transitions highly conductive solid electrolytes was proposed.

2011
Yan-Hua Zhang Da-Min Tian

In the title compound, C(10)H(8)N(6)·2H(2)O, the central aromatic ring makes dihedral angles of 23.59 (15) and 16.99 (16)° with the terminal imidazole and tetra-zole rings, respectively, which are themselves almost coplanar [dihedral angle = 6.61 (18)°]. Two H atoms of the two water mol-ecules are half occupied. In the crystal packing, weak inter-molecular O-H⋯N, O-H⋯O and N-H⋯N hydrogen bonds ...

2008
Chun-Xiang Li Xiu-Ying Li Chun-Bo Liu Yong-Sheng Yan Guang-Bo Che

In the title compound, [CdCl(2)(C(18)H(14)N(4))(2)]·0.5H(2)O, the Cd atom assumes a distorted octa-hedral trans-CdCl(2)N(4) geometry arising from its coordination by two N,N'-bidentate 10,11,12,13-tetra-hydro-4,5,9,14-tetra-azabenzo[b]triphenyl-ene (TBBT) mol-ecules and two chloride ions. In the crystal, π-π aromatic stacking inter-actions between adjacent TTBT rings are seen, with a centroid-c...

2011
Feng Gao Chang-Sheng Yao Zai-Sheng Lu Yan-Hui Shi

In the title compound, [Mn(C(6)H(4)N(5)O)(2)(H(2)O)(2)]·2H(2)O, the Mn(II) ion is situated on an inversion centre and is coordinated by the O and N atoms of two bis-chelating 5-(2-pyridyl-1-oxide)tetra-zolate ligands and two O atoms of two water mol-ecules in a distorted octa-hedral geometry. All the water H atoms are involved in O-H⋯N and O-H⋯O hydrogen bonds with uncoordinated water O atoms a...

2008
Li Jia Shou-Xin Ma Da-Cheng Li

The title compound, [Cu(2){SC(NH(2))NHNH(2)}(6)]I(2), was obtained by the reaction of CuI and thio-semicarbazide (TSCZ) in acetonitrile. Each Cu(I) ion is coordinated by four S atoms of the TSCZ ligands, forming a tetra-hedral geometry. Centrosymmetric dimers are formed by two coordination tetra-hedra sharing a common edge, with a Cu⋯Cu distance of 2.8236 (14) Å. The I(-) ion does not have any ...

2008
Christian Koch Helmar Görls Matthias Westerhausen

The transamination reaction of (2-pyridylmeth-yl)(triiso-propyl-silyl)amine with bis-{bis-(trimethyl-silyl)amido}zinc(II) yields the colorless title solvate, [Zn(C(15)H(27)N(2)Si)(2)]·0.5C(7)H(8)·0.25C(4)H(8)O. The title compound was crystallized from toluene and tetra-hydro-furan. There are two independent mol-ecules in the asymmetric unit. In each mol-ecule, the Zn atom is tetra-hedrally coor...

2009
Min Guo

In the centrosymmetric title complex, [Cu(C(6)H(5)N(6))(2)], the Cu(II) ion is coordinated by four N atoms from two symmetry-related bidentate 5-(2-amino-3-pyrid-yl)tetra-zolate ligands in a slightly distorted square-planar environment. There are weak intra-molecular N-H⋯N hydrogen bonds between the two ligands. In the crystal structure, there are significant π-π stacking inter-actions between ...

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