Poly[μ-aqua-aqua-μ-3-carboxypyrazine-2-carboxylato-sodium(I)]

2006 ◽  
Vol 62 (5) ◽  
pp. m945-m947 ◽  
Author(s):  
Mustafa Tombul ◽  
Kutalmış Güven ◽  
Nazım Alkış
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Coordination Number ◽  
Intramolecular Hydrogen Bond ◽  
Title Compound ◽  
Carboxyl Groups ◽  
Water Molecules ◽  
Dimeric Unit ◽  
Carboxylate Groups ◽  
Intramolecular Hydrogen

The crystal structure of the title compound, [Na(C6H3N2O4)(H2O)2] n , consists of molecular ribbons containing octahedral NaO5N units. Two adjacent Na atoms are bridged by two water molecules to give a centrosymmetric dimeric unit. Each Na centre is coordinated by two carboxylate groups. The ligand also uses one N atom to coordinate to Na. In addition, each Na atom is coordinated by one water O atom, raising the coordination number to six. One of the carboxyl groups retains its H atom, which takes part in an O—H...O [O...O = 2.563 (1) Å] intramolecular hydrogen bond.

1-{[5-Fluoro-2-(trifluoromethyl)phenyl]iminomethyl}-2-naphthol

2007 ◽  
Vol 63 (3) ◽  
pp. o1407-o1408
Author(s):  
Yun-Fa Zheng ◽  
Liang-Gui Wang ◽  
Guo-Bing Yan
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Schiff Base ◽  
Intramolecular Hydrogen Bond ◽  
Title Compound ◽  
Stacking Interactions ◽  
Dimensional Chain ◽  
One Dimensional ◽  
Compound C ◽  
Intramolecular Hydrogen

The title compound, C18H11F4NO, a Schiff base, has been structurally characterized. One intramolecular hydrogen bond influences the conformation of the molecule. The crystal structure is extended into a one-dimensional chain along the c axis via π–π stacking interactions.

scholarly journals Crystal structure of N-(diphenylphosphoryl)-2-methoxybenzamide

2019 ◽  
Vol 75 (7) ◽  
pp. 939-941
Author(s):  
Victor A. Trush ◽  
Nataliia S. Kariaka ◽  
Viktoriya V. Dyakonenko ◽  
Svitlana V. Shishkina ◽  
Vladimir M. Amirkhanov
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Metal Ions ◽  
Intermolecular Interactions ◽  
Intramolecular Hydrogen Bond ◽  
Title Compound ◽  
Π Interactions ◽  
Compound C ◽  
Bidentate Chelate ◽  
Intramolecular Hydrogen

In the title compound, C20H18NO3P, the C=O and P=O groups of the carbacylamidophosphate (CAPh) fragments are located in a synclinal position relative to each other and are pre-organized for bidentate chelate coordination of metal ions. The N—H group is involved in the formation of an intramolecular hydrogen bond. In the crystal, molecules do not form strong intermolecular interactions but the molecules are linked via weak C—H...π interactions, forming chains along [001].

scholarly journals Crystal structure of 1-amino-2-oxo-2,5,6,7,8,9-hexahydro-1H-cyclohepta[b]pyridine-3-carbonitrile

2016 ◽  
Vol 72 (9) ◽  
pp. 1239-1241 ◽  
Author(s):  
Galal H. Elgemeie ◽  
Peter G. Jones
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Intramolecular Hydrogen Bond ◽  
Title Compound ◽  
Intermolecular Hydrogen Bond ◽  
Membered Ring ◽  
The Other ◽  
Double Layers ◽  
Compound C ◽  
Intramolecular Hydrogen

In the title compound, C11H13N3O, the seven-membered ring adopts a conformation such that the three atoms not involved in the aromatic plane lie on the same side of that plane. One hydrazinic H atom forms an intramolecular hydrogen bond to the O atom; the other forms a classical intermolecular hydrogen bond N—H...O, which combines with a `weak' Har...O interaction to build up double layers of molecules parallel to thebcplane.

scholarly journals Tris{2-methoxy-6-[(4-methylphenyl)iminiomethyl]phenolato-κ2O,O′}tris(thiocyanato-κN)cerium(III)

2009 ◽  
Vol 65 (6) ◽  
pp. m650-m650 ◽  
Author(s):  
Jian-Feng Liu ◽  
Hui-Duo Xian ◽  
Guo-Liang Zhao
Keyword(s):  
Hydrogen Bond ◽  
Schiff Base ◽  
Coordination Number ◽  
Intramolecular Hydrogen Bond ◽  
Title Compound ◽  
Asymmetric Unit ◽  
Cerium Ion ◽  
Protonated Imine ◽  
Intramolecular Hydrogen

The asymmetric unit of the title compound, [Ce(NCS)3(C15H15NO2)3], contains three Schiff base 2-methoxy-6-[(4-methylphenyl)iminomethyl]phenol (HL) ligands and three independent thiocyanate ions that coordinate the cerium ionviatheir N atoms. The protonated imine N atoms are involved in an intramolecular hydrogen bond with the respective phenoxide group. The Ce(III) ion exhibits a coordination number of nine.

(E)-4-Bromo-2-(2-methoxyphenyliminomethyl)phenol

2007 ◽  
Vol 63 (11) ◽  
pp. o4241-o4241
Author(s):  
Zarife Sibel Gül ◽  
Ferda Erşahin ◽  
Erbil Ağar ◽  
Şamil Işık
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Dihedral Angle ◽  
Intramolecular Hydrogen Bond ◽  
Title Compound ◽  
Tautomeric Form ◽  
Aromatic Rings ◽  
Compound C ◽  
Intramolecular Hydrogen ◽  
Strong Intramolecular Hydrogen Bond

The molecule of the title compound, C14H12BrNO2, is almost planar and the dihedral angle between the planes of the two aromatic rings is 3.8 (2)°. The molecule exists in the crystal structure in the phenol–imine tautomeric form, with the H atom located on O rather than on N. This H atom is involved in a strong intramolecular hydrogen bond.

scholarly journals Crystal structure ofN-[6-amino-5-(benzo[d]thiazol-2-yl)-3-cyano-4-methylsulfanyl-2-oxo-1,2-dihydropyridin-1-yl]-4-methylbenzenesulfonamide dimethylformamide monosolvate

2017 ◽  
Vol 73 (12) ◽  
pp. 1820-1822 ◽  
Author(s):  
Rasha A. Azzam ◽  
Galal H. Elgemeie ◽  
Rasha E. Elsayed ◽  
Peter G. Jones
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Hydrogen Bonds ◽  
Intramolecular Hydrogen Bond ◽  
Title Compound ◽  
Ring System ◽  
Interplanar Angle ◽  
Compound C ◽  
Intramolecular Hydrogen

In the title compound, C21H17N5O3S3·C3H7NO, the toluenesulfonamide ring and the combined ring system involving the pyridone and benzothiazole rings subtend an interplanar angle of 39.86 (4)°. The pyridone and benzothiazyl rings are linked by the intramolecular hydrogen bond N—Hamine...Nthiazole. The DMF O atom accepts two classical hydrogen bonds. The molecules are linked by hydrogen bonds and an S...O contact to form layers parallel to thebcplane.

scholarly journals Synthesis and Complexation Properties of 2-Hydroxy-5-methoxyphenylphosphonic Acid (H3L1). Crystal Structure of the [Cu(H2L1)2(Н2О)2] Complex

2021 ◽  
Vol 91 (11) ◽  
pp. 2176-2186
Author(s):  
G. S. Tsebrikova ◽  
Yu. I. Rogacheva ◽  
I. S. Ivanova ◽  
A. B. Ilyukhin ◽  
V. P. Soloviev ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Methoxy Group ◽  
Protonation Constants ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Stability ◽  
Intramolecular Hydrogen ◽  
Oxygen Atoms

Abstract 2-Hydroxy-5-methoxyphenylphosphonic acid (H3L1) and the complex [Cu(H2L1)2(H2O)2] were synthesized and characterized by IR spectroscopy, thermogravimetry, and X-ray diffraction analysis. The polyhedron of the copper atom is an axially elongated square bipyramid with oxygen atoms of phenolic and of monodeprotonated phosphonic groups at the base and oxygen atoms of water molecules at the vertices. The protonation constants of the H3L1 acid and the stability constants of its Cu2+ complexes in water were determined by potentiometric titration. The protonation constants of the acid in water are significantly influenced by the intramolecular hydrogen bond and the methoxy group. The H3L1 acid forms complexes CuL‒ and CuL24‒ with Cu2+ in water.

scholarly journals Crystal structure of poly[[[μ4-5-(9H-carbazol-9-yl)isophthalato][μ3-5-(9H-carbazol-9-yl)isophthalato]bis(dimethylformamide)(methanol)dizinc] dimethylformamide monosolvate]

2015 ◽  
Vol 71 (8) ◽  
pp. m152-m153 ◽  
Author(s):  
Liubov M. Lifshits ◽  
Charles Campana ◽  
Jeremy K. Klosterman
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Title Compound ◽  
Solvent Molecule ◽  
Lone Pair ◽  
Π Interactions ◽  
Carboxylate Groups ◽  
Medium Strength ◽  
Secondary Building Units ◽  
Coordination Spheres

The structure of the polymeric title compound, {[Zn2(C20H11NO4)2(C3H7NO)2(CH3OH)]·C3H7NO}n, comprises carbazolylisophthalate moieties connecting dimetallic tetracarboxylate zinc secondary building units (SBUs) parallel to [100] and [010], leading to a layer-like arrangement parallel to (001). Each SBU consists of two Zn atoms in slightly distorted tetrahedral and octahedral coordination environments [Zn...Zn = 3.5953 (6) Å]. Three carboxylate groups bridge the two Zn atoms in a μ2-O:O′ mode, whereas the fourth coordinates through a single carboxylate O atom (μ1-O). The O atoms of two dimethylformamide (DMF) and one methanol molecule complete the Zn coordination spheres. The methanol ligand interacts with the noncoordinating DMF moleculeviaan O—H...O hydrogen bond of medium strength. Carbazoles between the layers interdigitate through weak C—H....π interactions to form a laminar solid stacked along [010]. Two kinds of C—H...π interactions are present, both with a distance of 2.64 Å, between the H atoms and the centroids, and a third C—H...π interaction, where the aromatic H atom is located above the carbazole N-atom lone pair (H...N = 2.89 Å). Several C—H...O interactions occur between the coordinating DMF molecule, the DMF solvent molecule, and ligating carboxylate O atoms.

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