Describing a torsion angle between 150° and 180°

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  • antiperiplanar — an|ti|pe|ri|pla|nar [↑ anti (1), ↑ peri (1), u. ↑ planar] Abk.: ap: nennt man die gestaffelte ↑ Konformation eines Moleküls mit freier Drehbarkeit um eine Einfachbildung (z. B. bei 1,2 Dichlorethan), wenn zwei vicinale Substituenten (hier z. B.… …   Universal-Lexikon

  • antiperiplanar conformation — antiperiplanarinė konformacija statusas T sritis chemija apibrėžtis Dviejų pakaitų prie gretimų atomų išsidėstymas Niumeno projekcijoje +180±30° arba –180±30° sektoriuje. atitikmenys: angl. anti conformation; antiperiplanar conformation;… …   Chemijos terminų aiškinamasis žodynas

  • Elimination reaction — An elimination reaction is a type of organic reaction in which two substituents are removed from a molecule in either a one or two step mechanism [JerryMarch] . Either the unsaturation of the molecule increases (as in most organic elimination… …   Wikipedia

  • Pentane interference — or syn pentane interaction is the steric hindrance that the two terminal methyl groups experience in one of the chemical conformations of n pentane. The possible conformations are combinations of anti conformations and gauche conformations and… …   Wikipedia

  • ADN-B — Animación de la estructura de una sección de ADN. Las bases nitrogenadas tienen una orientación más o menos perpendicular al eje de la hélice. El ADN B es el modelo propuesto por Watson y Crick sobre la estructura secundaria del ADN y es la forma …   Wikipedia Español

  • Interferencia de pentano — La interferencia del pentano o interacción syn pentano es el impedimento estérico que experimentan los dos grupos metilo terminales en una de las conformaciones del n pentano. Las conformaciones posibles son combinaciones de las conformaciones… …   Wikipedia Español

  • Stereoelektronische Effekte — sind räumliche Orientierungen von Molekülen oder bestimmte Verläufe einer chemischen Reaktion, welche sich aus der räumlichen Anordnung von Molekülorbitalen ergeben. Die Bevorzugung dieser folgt dabei aus Donor Akzeptor Wechselwirkungen dieser… …   Deutsch Wikipedia

  • Alkane — Not to be confused with Alkene or Alkyne. Chemical structure of methane, the simplest alkane Alkanes (also known as paraffins or saturated hydrocarbons) are chemical compounds that consist only of hydrogen and carbon atoms and are bonded… …   Wikipedia

  • Electrophile — In chemistry, an electrophile (literally electron lover ) is a reagent attracted to electrons that participates in a chemical reaction by accepting an electron pair in order to bond to a nucleophile. Because electrophiles accept electrons, they… …   Wikipedia

  • Conformational isomerism — Conformers of butane, shown in Newman projection. The two gauche as well as the anti form are staggered conformations In chemistry, conformational isomerism is a form of stereoisomerism in which the isomers can be interconverted exclusively by… …   Wikipedia

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