steric hindrance

steric hindrance
Any of several effects, most common in organic chemistry, in which the structure or reactivity of a molecule is affected by the physical size and proximity of neighbouring parts of the molecule.

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  • steric hindrance — n. the prevention or retardation of a chemical reaction, caused by the arrangement of atoms in a molecule …   English World dictionary

  • steric hindrance — erdvinis trukdymas statusas T sritis chemija apibrėžtis Reakcijos centrus ekranuojančių pakaitų poveikis, mažinantis molekulės reaktingumą. atitikmenys: angl. steric hindrance rus. пространственное затруднение; стерическое препятствие …   Chemijos terminų aiškinamasis žodynas

  • steric hindrance — noun : hindrance of chemical action ascribed to the arrangement of atoms in a molecule * * * Chem. the prevention or retardation of inter or intramolecular interactions as a result of the spatial structure of a molecule. [1900 05] …   Useful english dictionary

  • steric hindrance — Chem. the prevention or retardation of inter or intramolecular interactions as a result of the spatial structure of a molecule. [1900 05] * * * …   Universalium

  • Steric effects — See also: intramolecular forces Steric effects arise from the fact that each atom within a molecule occupies a certain amount of space. If atoms are brought too close together, there is an associated cost in energy due to overlapping electron… …   Wikipedia

  • steric — adj. Chem. relating to the spatial arrangement of atoms in a molecule. Phrases and idioms: steric hindrance the inhibiting of a chemical reaction by the obstruction of reacting atoms. Etymology: irreg. f. Gk stereos solid …   Useful english dictionary

  • steric — Pertaining to stereochemistry. s. hindrance interference with or inhibition of a seemingly feasible reaction (usually synthetic) because the size of one or another reactant prevents approach to the required interatomic distance. * * * ste·ric… …   Medical dictionary

  • Alkane stereochemistry — concerns the stereochemistry of linear alkanes and the linear alkane conformers. The existence of more than one conformation is due to hindered rotation around sp3 hybridised carbon carbon bonds. The smallest molecule with such a chemical bond,… …   Wikipedia

  • Persistent carbene — A stable carbene: isolated 1,3 dimesitylimidazol 2 ylidene in a Schlenk flask (stir bar also present). A persistent carbene (also known as stable carbene or Arduengo carbene) is a type of carbene demonstrating particular stability. The best known …   Wikipedia

  • Коптюг — Коптюг, Валентин Афанасьевич Валентин Афанасьевич Коптюг Дата рождения: 9 июня 1931(1931 06 09) Место рождения: Юхнов, Западная область, СССР Дата смерти: 10 января 1997 …   Википедия

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