Search results for "Deriva"
showing 10 items of 1423 documents
Synthesis, spectroscopic study, and crystal structure of a new organotin(IV) selenate derivative
2018
Abstract The polymeric organotin(IV) selenate complex [(Me3Sn)3(SeO4)(OH)]n (1) has been isolated as single crystals from the reaction of [(Me2NH2)2SeO4] and Me3SnCl in methanol. In the solid state, compound 1 was characterized by X-ray diffraction analysis, Fourier transform-infrared spectroscopy, and elemental analysis. 1 crystallizes in the orthorhombic system space group Pbca with a=11.0231(2) Å, b=16.3461(3) Å, c=20.9945(4) Å, α=β=γ=90°, V=3782.89(12) Å3, and Z=8. Its structure can be described as a polymeric zigzag chain based on Me3Sn moieties linked by tridentate selenate anions. Pendant (Me3Sn)2OH groups are also connected to the chain, according to a syndiotactic organization, and…
Synthesis, crystal structure and Hirshfeld analysis of a crystalline compound comprising a 1/1 mixture of 1-[(1R,4S)- and 1-[(1S,4R)-1,7,7-trimethyl-…
2020
A racemic mixture of (R)- and (S)-camphor thiosemicarbazone, which crystallizes in the centrosymmetric space group C2/c, is reported.
Crystal structure of (E)-2-(tert-butylamino)-4-(tert-butylimino)naphthalen-1(4H)-one
2018
The title compound is the first example of a naphthoquinone imine derivative crystallizing in the 4-imine/2-amine tautomeric form having bulky tert-butyl substituents at the N atoms.
Crystal structures of (E)-3-(4-hydroxybenzylidene)chroman-4-one and (E)-3-(3-hydroxybenzylidene)-2-phenylchroman-4-one
2019
The synthesis and crystal structures of (E)-3-(4-hydroxybenzylidene)chroman-4-one, C16H12O3, I, and (E)-3-(3-hydroxybenzylidene)-2-phenylchroman-4-one, C22H16O3, II, are reported. These compounds are of interest with respect to biological activity. Both structures display intermolecular C—H...O and O—H...O hydrogen bonding, forming layers in the crystal lattice. The crystal structure of compound I is consolidated by π–π interactions. The lipophilicity (logP) was determined as it is one of the parameters qualifying compounds as potential drugs. The logP value for compound I is associated with a larger contribution of C...H interaction in the Hirshfeld surface.
Crystal structure of 5-{3-[2,6-dimethyl- 4-(5-methyl-1,2,4-oxadiazol-3-yl)phenoxy]propyl}- N-(11-hydroxyundecyl)isoxazole-3-carboxamide hemihydrate
2015
The crystal structure and supramolecular features of 5-{3-[2,6-dimethyl-4-(5-methyl-1,2,4-oxadiazol-3-yl)phenoxy]propyl}-N-(11-hydroxyundecyl)isoxazole-3-carboxamide hemihydrate, a derivative of antiviral ‘WIN compounds’, are reported.
Unexpected behaviour of copper(I) towards a tridentate Schiff base: Synthesis, structure and properties of new Cu(I)-Cu(II) and Cu(II) complexes
2001
cited By 17; International audience; The reaction of CuBr with 2,6-bis[1-(2,6-diisopropylphenylimino)ethyl]pyridine L afforded a new Cu(I)-Cu(II) derivative [CuBrL]2[Cu2Br4] (1), while the reaction of [Cu(CH3CN)4]PF6 with L in THF yielded the new Cu(I) compound CuL(THF)(CH3CN)PF6 (2). Derivative 2 further reacted with halogenated solvents to yield halogeno-Cu(II) salts, [CuClL]PF6 (3) using CHCl3 and [CuBrL]Br3 (4) using CHBr3. Compounds 1, 3 and 4 have been fully characterised by X-ray crystallography; they contain essentially similar [CuXL]+ cations with a square planar copper(II) co-ordination. However, the structure of compound 1 must be viewed as built of tetranuclear units since two […
Chemical Composition and Evaluation of Insecticidal Activity of Calendula incana subsp. maritima and Laserpitium siler subsp. siculum Essential Oils …
2022
The problems of the environment and human health related to the use of synthetic and broad-spectrum insecticides have increasingly motivated scientific research on different alternatives and among these, the use of green systems, such as essential oils, have been explored. Several species of the Apiaceae and Asteraceae families, aromatic herbs rich in secondary bioactive metabolites, are used in the industrial field for pharmaceutical, cosmetic, and food purposes. Different essential oils extracted from some species of these families have shown acute toxicity and attractive and/or repellent effects towards different insects. In our work, we investigated the toxic potential of Calendula inca…
Establecimiento de organoides derivados de pacientes con carcinoma colorrectal como modelo para cribado de drogas con acción antitumoral
2022
El cáncer colorrectal (CCR) es la segunda causa de muerte por cáncer a nivel mundial, y es el tercero en incidencia. En los últimos años se han realizado grandes avances para entender mejor los aspectos clínico-patológicos y moleculares del CCR lo que ha conducido a una mejora de las terapias y aumentado la supervivencia de los pacientes. Sin embargo, pese a estos avances muchos pacientes no se benefician de los tratamientos, lo que evidencia la necesidad de búsqueda de nuevos biomarcadores de respuesta y modelos preclínicos adecuados que permitan avanzar hacia una medicina más personalizada. En este contexto, la tecnología de los organoides ha revolucionado el estudio in vitro del cáncer, …
„Werbungen versprechen ja oft mehr, als das Produkt hält.“: Eine Studie über die Pluralbildung des Lexems Werbung
2016
Saksan kielen monikon muodostus tuottaa vieraskielisille kielenkäyttäjille usein ongel-mia muun muassa sanojen erilaisten merkitysten ja siitä johtuvan monikonmuodostus-kyvyn vuoksi. Tämä kandidaatintutkielma keskittyy lekseemin Werbung eli mainonta, mainos merkitysvariantteihin ja niiden käyttöön. Tekijä itse oli kohdannut kielenkäyt-täjänä monikkomuodon Werbungen, jonka olemassaolon sanakirjat järjestelmällisesti kieltävät. Tästä johtuen tutkielmassa selvitetään, onko ko. lekseemillä monikkoa, jos on, niin miten sitä käytetään ja vastaako se suomen lekseemiä mainos, -et. Koska ongelma perustuu sanojen monikonmuodostukseen, pohjaa tutkielma teoria-taustansa monikonmuodostukseen. Erityisemm…
El alquimista de la palabra. Procedimientos neológicos en la novelas de Ramón Gómez de la Serna
2010
Análisis de los procedimientos neológicos en un corpus de novelas de Ramón Gómez de la Serna.