Results 11 to 20 of about 52,626 (269)
IUCrDataThe title compound (systematic name: pyridinium 4-methylbenzenesulfonate), C5H6N+·C7H7O3S−, is the pyridinium salt of para-toluenesulfonic acid. In the crystal, classical N—H...O hydrogen bonds as well as C—H...O contacts connect the cationic and anionic entities into sheets lying parallel to the ab plane.
Eric Cyriel Hosten, Richard Betz
doaj +5 more sources
Regioselective Oxidation of 3-Substituted Pyridinium Salts
Molecules, 2000 (1'R)-(+)-3-Hydroxymethyl-1-(1'-phenyl-ethyl)-pyridinium chloride (1), 1-benzyl-3-[1', 3']-dioxolan-2'-yl-pyridinium chloride (2) and (2'S, 4'S, 5'R)-(-)-1-benzyl-3-(3',4'-dimethyl-5'-phenyl-oxazolidin-2'-yl)-pyridinium bromide (3), were transformed by ...
W. F. Reynolds +6 more
doaj +2 more sources
4-(Dimethylamino)pyridinium 4-toluenesulfonate
Acta Crystallographica Section E, 2008 In the title compound, C7H11N2+·C7H7O3S−, the cation is protonated at the N atom of the heterocyclic ring. The dimethylamino group lies close to the pyridinium ring plane with a dihedral angle between the pyridinium and the dimethylamine CNC ...
Jim Simpson, C. John McAdam
doaj +2 more sources
Quaternary Pyridinium Salts: A Review
Journal of Oleo Science, 2008 Cationic surfactants are being used in various applications industrially and domestically for a long time. Pyridinium salts come under the category of cationic surfactants. These are unsaturated heterocyclic compounds having different functional groups present either on pyridine ring or at nitrogen atom.
Madaan, Parag, Tyagi, Vinod K.
exaly +4 more sources
(Cobaltoceniumylamido)pyridinium hexafluoridophosphate [PDF]
IUCrData, 2021 The title compound, [Co(C5H5)(C10H9N2)]PF6, was synthesized from deprotonated 1-aminopyridinium iodide, followed by microwave-assisted nucleophilic aromatic substitution of iodo-cobaltocenium iodide. After anion exchange with potassium hexafluoridophosphate, the title compound crystallizes as orange prisms in the space group Pc.
Daniel Menia +3 more
openaire +3 more sources
Catalytic Photochemical Enantioselective α-Alkylation with Pyridinium Salts [PDF]
, 2022 We have developed a chiral amine catalyzed enantioselective α-alkylation of aldehydes with amino acid derived pyridinium salts as alkylating reagents. The reaction proceeds in the presence of visible light (390 nm) and in the absence of a photocatalyst ...
Santhivardhana Reddy, Yetra +2 more
core +1 more source
PYRIDINIUM, PIPERIDINIUM AND MORPHOLINIUM CATIONIC SURFACTANTS(1): SYNTHESIS, CHARACTERIZATION, HEMOLYSIS AND ANTIOXIDATIVE EFFICIENCY [PDF]
Al-Azhar Journal of Pharmaceutical Sciences, 2013 A Series of pyridinium, piperidinium and morpholinium derived cationic surfactants differing in the length of side alkylating chain from C10 to C18 is described.
Nihal Shaker
doaj +1 more source
Pyridinium Salts of Dehydrated Lanthanide Polychlorides
Molecules, 2022 The reaction of lanthanide (Ln) chloride hydrates ([Ln(H2O)n(Cl)3]) with pyridine (py) yielded a set of dehydrated pyridinium (py-H) Ln-polychloride salts. These species were crystallographically characterized as [[py-H-py][py-H]2[LnCl6]] (Ln-6; Ln = La,
Roger E. Cramer +2 more
doaj +1 more source
Sensors, 2022 Boron dipyrromethene (BODIPY) dyes bearing a pyridyl moiety have been used as metal ion sensors, pH sensors, fluorescence probes, and as sensitizers for phototherapy.
Caroline Ndung’u +7 more
doaj +1 more source
IUCrData, 2021 The asymmetric unit of the title solvated molecular salt, 3C32H36Br2N42+·6Br−·2C2H5OH, consists of 1.5 cations, three bromide anions and one ethanol solvent molecule of crystallization. The half-cation is completed by crystallographic inversion symmetry.
Shengnan Wang, Gang Liu, Zhichao Wu
doaj +1 more source