scholarly journals Crystallographic and spectroscopic characterization of 3-chloro-5-fluorosalicylaldehyde

2020 ◽  
Vol 76 (12) ◽  
pp. 1810-1812
Author(s):  
Christopher T. Triggs ◽  
Joseph M. Tanski
Keyword(s):  
Hydrogen Bonding ◽  
Title Compound ◽  
Intramolecular Hydrogen Bonding ◽  
Spectroscopic Characterization ◽  
Face To Face ◽  
Π Stacking ◽  
Intramolecular Hydrogen

The title compound (systematic name: 3-chloro-5-fluoro-2-hydroxybenzaldehyde), C7H4ClFO2, is a dihalogenated salicylaldehyde derivative that has been studied for its antibacterial characteristics. The salicylaldehyde engages in intramolecular hydrogen bonding with an O—H...O distance of 2.6231 (19) Å while the molecules pack together via weak intermolecular C—H...O, C—H...F and F...O interactions and offset face-to-face π-stacking.

scholarly journals Crystallographic and spectroscopic characterization of 5-chloropyridine-2,3-diamine

2017 ◽  
Vol 73 (8) ◽  
pp. 1213-1217
Author(s):  
Aron Sulovari ◽  
Joseph M. Tanski
Keyword(s):  
Hydrogen Bonding ◽  
Title Compound ◽  
Intramolecular Interaction ◽  
Spectroscopic Characterization ◽  
Intermolecular Hydrogen Bonding ◽  
Amino Groups ◽  
Hydrogen Atoms ◽  
Face To Face ◽  
Compound C

The two ortho-amino groups of the title compound, C5H6ClN3, twist out of the plane of the molecule to minimize intramolecular interaction between the amino hydrogen atoms. In the crystal, the amino groups and the pyridine N atom engage in intermolecular hydrogen bonding. The molecules pack into spiral hydrogen-bonded columns with offset face-to-face π-stacking.

scholarly journals Crystal structure, Hirshfeld surface analysis and spectroscopic characterization of the di-enol tautomeric form of the compound 3,3′-[(2-sulfanylidene-1,3-dithiole-4,5-diyl)bis(sulfanediyl)]bis(pentane-2,4-dione)

2020 ◽  
Vol 76 (9) ◽  
pp. 1427-1432
Author(s):  
Keysha T. Cordero Giménez ◽  
Victoria Y. Soto Díaz ◽  
Jean C. González Espiet ◽  
Alexis Lavín Flores ◽  
Jesbaniris Bas Concepción ◽  
...  
Keyword(s):  
Title Compound ◽  
Tautomeric Form ◽  
Spectroscopic Characterization ◽  
Inversion Center ◽  
Torsion Angles ◽  
Triclinic Space Group ◽  
Covalently Linked ◽  
Intramolecular Hydrogen ◽  
Short Contacts

The reaction between [TBA]2[Zn(dmit)2] and 3-chloro-2,4-pentanedione yielded single crystals of the title compound, (3E,3′E)-3,3′-[(2-sulfanylidene-1,3-dithiole-4,5-diyl)bis(sulfanediyl)]bis(4-hydroxypent-3-en-2-one), C13H14O4S5, after solvent evaporation. The title compound crystallizes in the triclinic space group P\overline{1} with two molecules related by an inversion center present in the unit cell. The central thione ring moiety contains a carbon–carbon double bond covalently linked to two sulfoxide substituents located outside of the plane of the ring. The S—C—C—S torsion angles are −176.18 (8) and −0.54 (18)°. Intramolecular hydrogen bonds occur within the two dione substituents (1.67–1.69 Å). Adjacent asymmetric units are linked by C—H...S (2.89–2.90 Å), S...S [3.569 (1) Å] and O...H [2.56–2.66 Å between non-stacked thione rings] short contacts.

Heteroleptic palladium(II) complexes of dipyrrin-1,9-dione supported by intramolecular hydrogen bonding

2020 ◽  
Vol 24 (01n03) ◽  
pp. 112-120 ◽  
Author(s):  
Clayton J. Curtis ◽  
Elisa Tomat
Keyword(s):  
Hydrogen Bonding ◽  
Chemical Characterization ◽  
Intramolecular Hydrogen Bonding ◽  
Palladium Complexes ◽  
Primary Amines ◽  
Redox Active ◽  
Electron Reduction ◽  
Intramolecular Hydrogen ◽  
Planar Geometries

The dipyrrin-1,9-dione framework, which is characteristic of the propentdyopent pigments deriving from heme metabolism, coordinates metal ions as monoanionic bidentate donors. The resulting analogs of dipyrrinato complexes undergo reversible ligand-based reductions, thus showcasing the ability of the dipyrrindione scaffold to act as an electron reservoir. Herein we report the synthesis and characterization of three heteroleptic palladium complexes of the redox-active dipyrrindione ligand. Primary amines were chosen as additional ligands so as to assemble complexes of planar geometries with complementary interligand hydrogen-bonding. Full chemical characterization confirms the hydrogen bonding interactions between the primary amine ligands and the acceptor carbonyl groups on the dipyrrolic ligand. The resulting heteroleptic compounds display reversible one-electron reduction events that are centered on the dipyrrindione ligand as revealed by voltammetry and spectroelectrochemistry data. Within these planar Pd(II) complexes, the propentdyopent motif therefore combines reversible ligand-based redox chemistry with interligand hydrogen bonding in the primary coordination sphere of the metal center.

Synthesis and characterization of N-Chloro-o-nitroanilines

1976 ◽  
Vol 29 (2) ◽  
pp. 367 ◽  
Author(s):  
KJ Chapman ◽  
LK Dyall
Keyword(s):  
Hydrogen Bonding ◽  
Carbon Tetrachloride ◽  
Infrared Spectra ◽  
Acid Catalysis ◽  
Intramolecular Hydrogen Bonding ◽  
Synthesis And Characterization ◽  
Catalysed Reaction ◽  
Lone Pairs ◽  
Intramolecular Hydrogen

Chlorine(1) oxide in carbon tetrachloride was found to be an effective reagent for N-chlorinating 2-nitroanilines. These N-chloro-2-nitroanilines are sufficiently stable in solution at 20� to be characterized by reduction and by proton n.m.r, and infrared spectra. The infrared N-H stretching frequencies fall near the low value of 3330 cm-1, apparently because of interaction between N-H bond and chlorine lone pairs; there are also effects of intramolecular hydrogen bonding and of conformation. Under acid catalysis, N-chloro-2-nitroaniline rearranges to C-chlorinated 2-nitroanilines, while with alkali it cyclizes to benzofuroxan. The acid-catalysed reaction has the same features as the Orton rearrangement of N-chloroacetanilides.

5-(p-Tolylsulfonyl)-3-oxa-5-azatricyclo[5.2.1.04,8]decane

2006 ◽  
Vol 62 (5) ◽  
pp. o1923-o1924
Author(s):  
Cengiz Arıcı ◽  
Dinçer Ülkü ◽  
H. Ümit Kanıskan ◽  
Özdemir Doğan
Keyword(s):  
Hydrogen Bonding ◽  
Title Compound ◽  
Intramolecular Hydrogen Bonding ◽  
Boat Conformation ◽  
Envelope Conformation ◽  
Compound C ◽  
Hydrogen Bonding Interactions ◽  
Intramolecular Hydrogen

In the title compound, C15H19NO3S, the tricyclodecane part of the molecule can be described in terms of three rings. The C4N ring is in an envelope conformation, as is the C5 ring. The C5O ring adopts a boat conformation. There are no inter- or intramolecular hydrogen-bonding interactions.

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