Search results for "Phanes"
showing 10 items of 29 documents
Nyctiphanes couchii as intermediate host for Rhadinorhynchus sp. (Acanthocephala, Echinorhynchidae) from NW Iberian Peninsula waters
2013
12 páginas, 3 figuras, 3 tablas
Ar. fr. *322 K.-A.: parodia de lenguaje médico
2010
En este artículo el autor trata de mostrar las relaciones entre un fragmento aristofánico (Ar. fr. *322 K.-A.) y el vocabulario de la medicina, con vistas a localizar la parodia y los propósitos cómicos que, básicamente, representan una parodia cómica de la violencia. In this paper the author tries to point out the relations between an Aristophanic Fragment (Ar. fr. *322 K.-A.) and vocabulary from Medicine, in order to search for parody and comical purposes, mainly comically parody of violence.
Eurípides, Helena 435-482. Elementos conversacionales, humor y guiños aristofánicos en una tragedia
2010
En este artículo el autor trata de estudiar en detalle los elementos conversacionales de un conocido pasaje de la Helena de Eurípides, su connatural asiento en la dicción de la tragedia, su interacción con algunos elementos humorísticos, los problemas que esto plantea y la ponderación de todo ello con una visión ecléctica. Se llega a la conclusión de que Eurípides introduce humor y guiños a la Comedia aristofánica en este caso y que, gracias a su talento dramático, no desvirtúa la esencia de la tragedia. This paper deals with a detailed study of conversational idioms in a well-known scene of Euripides’ Helen, their connatural place in the diction of tragedy, their interaction with some humo…
Propriétés et performances de phosphines ferrocéniques dans le couplage C-O, C-S et C-N : nouvelles méthodologies de synthèse au palladium
2012
Multidentate ligands usually show great activities in low loading organometallic catalysis in palladium. Among these ligands, the use of ferrocenyl polyphosphane ligands give interesting results. Robust palladium-ferrocenyl triphosphane catalytic systems have permitted to obtain biarylamines and aryl-heteroaryl ethers in the presence of low catalytic loadings. DFT studies on catalytic cycle during formation of aryl-heteroaryl ethers were carried out. The presence of third phosphino group stabilizes a transition state which enhances the rate of the reductive elimination. Triarylamines were obtained with ferrocenyl diphosphane in the presence of 2 mol% of palladium loading. Moderate to excell…
The GenusCaenophanesFoerster, 1862 (Hymenoptera: Braconidae: Doryctinae) in the Western Palaearctic
2011
The Western Palaearctic species of the genus Caenophanes Foerster are reviewed. A new species from the Canary Islands, C. lapalmaensis sp. nov., is described. The name C. rugosifrons (Picard) is restored from synonymy (stat. resurr.). The redescriptions of C. incompletus (Ratzeburg) and C. rugosifrons are given. A key to the Western Palaearctic species of Caenophanes is suggested.
Magnetic field-induced alignment of molecular rotor-shaped cyclophanes
2010
Molecular pinwheels consisting of dipolar substituted cyclophanes in solution can function as free microscopic rotors in the presence of a homogeneous static magnetic field B and a circularly polarized electric field E rotating on a plane containing B. Owing to the high magnetic anisotropy of [26](1,2,3,4,5,6)cyclophane and [36](1,2,3,4,5,6)cyclophane biased by strong ring currents, ∼1 in 105 molecules are expected to align with the C6 symmetry axis perpendicular to a magnetic field of 21 T. The magnetic-field-controlled alignment of rotor-shaped cyclophanes is insignificantly affected by nonpolar solvents, for example, toluene.
Subcomponent self‐assembly of a cyclic tetranuclear Fe(II) helicate in a highly diastereoselective self‐sorting manner
2019
Abstract An enantiomerically pure diamine based on the 4,15‐difunctionalized [2.2]paracyclophane scaffold and 2‐formylpyridine self‐assemble into an optically pure cyclic metallosupramolecular Fe4L6 helicate upon mixing with iron(II) ions in a diastereoselective subcomponent self‐assembly process. The cyclic assembly results from steric strain that prevents the formation of a smaller linear dinuclear triple‐stranded helicate, and hence, leads to the larger strain‐free assembly that fulfils the maximum occupancy rule. Interestingly, use of the racemic diamine also leads to a racemic mixture of the homochiral cyclic helicates as the major product in a highly diastereoselective narcissistic ch…
Pierwsze stwierdzenie Lichenophanes varius (ILLIGER, 1801) (Coleoptera: Bostrichidae) na Pojezierzu Pomorskim
2013
Diastereoselective Synthesis of Dialkylated Bis(phosphino)ferrocenes: Their Use in Promoting Silver-Mediated Nucleophilic Fluorination of Chloroquino…
2017
International audience; The diastereoselective synthesis of dialkylated ferrocenyl bis(phosphane)s bearing aryl, alkyl, and hetero- or polycyclic substituents on the phosphino groups is reported, together with their characterization in the solid state by X-ray structure analysis and in solution by multinuclear NMR spectroscopy. Introduction of various alkyl groups on the ferrocene backbone, namely, tert-butyl, isopropyl, and trimethylsilyl, has a significant influence on the stereoselectivity of the ensuing lithiation/phosphination reactions. Only the introduction of the tert-butyl groups ensures both a high yield and perfect diastereoselectivity, which leads to the exclusive formation of t…
[3.3]Metacyclophane mit anti ‐Konformation
1992
[3.3]Metacyclophanes with anti Conformation The [3.3]metacyclophanes 5 and 9 with prevailing anti conformation were prepared by using different cyclisation techniques. 1H-NMR studies and X-ray structure analyses of both phanes 5 and 9 prove their unprecedented conformations.