steric strain

См. также в других словарях:

• Strain energy — In a molecule, strain energy is released when the constituent atoms are allowed to rearrange themselves in a chemical reaction or a change of chemical conformation in a way that:* angle strain, * torsional strain, * ring strain and/or steric… …   Wikipedia

• Van der Waals strain — In chemistry, van der Waals strain is strain resulting from van der Waals repulsion when two substituents in a molecule approach each other with a distance less than the sum of their van der Waals radii. Van der Waals strain is also called van… …   Wikipedia

• 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

• Hyperconjugation — In organic chemistry, hyperconjugation is the interaction of the electrons in a sigma bond (usually C–H or C–C) with an adjacent empty (or partially filled) non bonding p orbital or antibonding π orbital or filled π orbital, to give an extended… …   Wikipedia

• Cyclohexane conformation — A cyclohexane molecule in chair conformation. Hydrogen atoms in axial positions are shown in red, while those in equatorial positions are in blue. A cyclohexane conformation is any of several three dimensional shapes that a cyclohexane molecule… …   Wikipedia

• Methylcyclohexane — IU …   Wikipedia

• Cyclodecapentaene — or [10]annulene is an annulene with molecular formula C10H10. This organic compound is a conjugated 10 pi electron cyclic system and according to Huckel s rule it should display aromaticity. It is not aromatic, however, because of a combination… …   Wikipedia

• Nazarov cyclization reaction — The Nazarov cyclization reaction (often referred to as simply the Nazarov cyclization) is a chemical reaction used in organic chemistry for the synthesis of cyclopentenones. The reaction is typically divided into classical and modern variants,… …   Wikipedia

• Migratory insertion — A migratory insertion is a type of reaction in organometallic chemistry wherein two ligands on a metal complex combine. It is a subset of reactions that very closely resembles the insertion reactions, and both are differentiated by the mechanism… …   Wikipedia

• Aldol condensation — An aldol condensation is an organic reaction in which an enol or an enolate ion reacts with a carbonyl compound to form a β hydroxyaldehyde or β hydroxyketone, followed by a dehydration to give a conjugated enone. Aldol condensations are… …   Wikipedia

• Propellane — Propellanes are a class of tricyclic organic compounds sharing a common carbon carbon covalent bond. They are characterized by the presence of carbon with an inverted tetrahedral geometry, large steric strain and high reactivity and are for these …   Wikipedia