Search results for "Chloroform"
showing 10 items of 414 documents
CCDC 2009942: Experimental Crystal Structure Determination
2021
Related Article: Mengling Wu, Junle Zhang, Liangqian Yuan, Kari Rissanen, Fangfang Pan|2021|Chem.-Eur.J.|27|9814|doi:10.1002/chem.202100087
CCDC 274861: Experimental Crystal Structure Determination
2007
Related Article: M.Ciclosi, J.Lloret, F.Estevan, P.Lahuerta, M.Sanau, J.Perez-Prieto|2006|Angew.Chem.,Int.Ed.|45|6741|doi:10.1002/anie.200601084
CCDC 2092892: Experimental Crystal Structure Determination
2021
Related Article: Laura Carceller-Ferrer, Carlos Vila, Gonzalo Blay, M. Carmen Muñoz, José R. Pedro|2021|Org.Lett.|23|7391|doi:10.1021/acs.orglett.1c02571
CCDC 1826069: Experimental Crystal Structure Determination
2019
Related Article: Nico Röder, Tomasz Marszalek, Daniel Limbach, Wojciech Pisula, Heiner Detert|2019|ChemPhysChem|20|463|doi:10.1002/cphc.201800936
CCDC 614133: Experimental Crystal Structure Determination
2007
Related Article: Yu.Rudzevich, V.Rudzevich, D.Schollmeyer, I.Thondorf, V.Bohmer|2006|Org.Biomol.Chem.|4|3938|doi:10.1039/b609707c
Phytochemical Profile and Apoptotic Activity of Onopordum cynarocephalum.
2012
A phytochemical investigation of acetone and chloroform extracts of the aerial parts of Onopordum cynarocephalum Boiss. et Blanche was carried out. It led to the isolation of two new sesquiterpenes, the elemane aldehyde (2) and the eudesmane (11), together with 15 known compounds: two lignans (1 and 15) and 13 sesquiterpenes (3–10, 12–14, 16, 17). The structures were elucidated by spectroscopic analyses, especially 1D and 2D NMR spectra. The anti-growth effect against three human melanoma cell lines, M14, A375, and A2058, of the different extracts and compounds of O. cynarocephalum was also investigated. Among them, the chloroform extract exhibited the strongest biological activity, while t…
Zinc-salophen complexes as selective receptors for tertiary amines
2007
Zinc-salophen compounds 1-3 incorporating in the given order 1,2-diaminobenzene, 2,3-diaminonaphthalene, and 9,10-diaminophenantrene moieties were synthesised. Their binding properties toward a series of tertiary amines were assessed by UV-Vis and fluorescence spectroscopy in chloroform solution. Unprecedented selectivities of quinuclidine vs. triethylamine higher than 105 were recorded, thereby revealing the dramatic influence of steric effects on axial coordination of tertiary amines. X-Ray diffraction analyses showed that in the solid state compound 2 is dimeric, but its 1 : 1 quinuclidine complex is monomeric. Strong indications were obtained that both free receptors and their amine add…
Synthesis, characterization and kinetics of the metallation of the intermediate compound to produce compound · (H2O) from Rh(II) tetraacetate
1998
Abstract Photochemical irradiation of mixtures of [Rh2(μ-O2CCH3)4]·(HOCH3)2 and P(2-(CH3O)C6H4)Ph2 (POMe) in CH2Cl2 solution (1:1 molar ratio) yields quantitatively compound [ Rh 2 (μ- O 2 CCH 3 ) 3 ( O 2 CCH 3 )(η 2 - P (2-( CH 3 O ) C 6 H 4 ) Ph 2 ]·( H 2 O ) (1) containing a POMe acting as a chelating equatorial ( P ) axial ( O ) donor ligand. This compound undergoes intramolecular CH activation reaction at one of the phenyl rings in CHCl3 or CH3COOH/toluene solution at room temperature to form the monometallated compound [ Rh 2 (μ- O 2 CCH 3 ) 3 (μ-( C C 3 H 4 ) P (2-( CH 3 O C 6 H 4 ) Ph )]· ( H 2 O ) ( 2 ). The kinetics of the 1 → bd2 reaction have been studied in acid media (CH3CO…
Tuning the hydrogen bonding strength in 2,6-bis(cycloalkylcarbonylamino)pyridine assemblies by variable flexibility. Association constants measured b…
2011
International audience; The association of 2,6-bis(cycloalkylcarbonyloamino)pyridines with rigid and non-rigid counterparts was studied in chloroform solution by 1H NMR and computational methods. The angles within the cycloalkyl ring and rotation of these substituents determine the strength of the association via triple hydrogen-bonding. The dimerization and methyl-methyl repulsion have been addressed as mechanisms restricting heterocomplexation of diacetamide. The association constants obtained by the shift changes of hydrogen-bonded protons are in agreement with those of methine protons. This "dual shift" method was proposed as an additional verification of association constants obtained …
Solution behaviour and relative stability of the complexes [MCl2(RNCHCHNR)] and [MCl2(py-2-CHNR)] (M=Pd, Pt;R=C6H4OMe-p)
1988
Abstract Even though the α-diimino complexes [MCl 2 (RNCHCHNR)] and [MCl 2 (py-2-CHNR)] (M=Pd, Pt;R=C 6 H 4 OMe- p ) are poorly soluble in chlorinated solvents, such as chloroform and 1,2-dichloroethane, or in acetonitrile, the electronic and 1 H NMR spectra indicate that these compounds are generally present as undissociate monomers with σ, σ′- N,N′ chelate N-ligands in dilute solutions. Only for [PdCl 2 (RNCHCHNR)], some dissociation of the α-diimine occurs in acetonitrile. In dimethylsulfoxide, where the solubility is much higher, no dissociation is observed for the pyridine-2-carbaldimine complexes [MCl 2 (py-2-CHNR)], whereas the 1,2-bis(imino) ethane derivatives [MCl 2 (RNCH…