- electrocyclic
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Describing a molecular rearrangement in which a covalent single bond is formed between the ends of a fully conjugated system resulting in a cyclic compound with one fewer double bonds
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electrocyclic
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Electrocyclic reaction — In organic chemistry, an electrocyclic reaction is a type of pericyclic rearrangement reaction where the net result is one pi bond being converted into one sigma bond. These reactions are usually unnamed, being categorized by the following… … Wikipedia
electrocyclic reaction — elektrociklinė reakcija statusas T sritis chemija apibrėžtis Reakcija, kurios metu konjuguotosios π elektronų sistemos galiniai atomai susijungia viengubuoju ryšiu, o dvigubųjų ryšių skaičius sumažėja vienu vienetu. atitikmenys: angl.… … Chemijos terminų aiškinamasis žodynas
Woodward–Hoffmann rules — The Woodward–Hoffmann rules devised by Robert Burns Woodward and Roald Hoffmann are a set of rules in organic chemistry predicting the stereochemistry of pericyclic reactions based on orbital symmetry. These include electrocyclic reactions,… … 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
Pericyclic reaction — In organic chemistry, a pericyclic reaction is a type of organic reaction wherein the transition state of the molecule has a cyclic geometry, and the reaction progresses in a concerted fashion. Pericyclic reactions are usually rearrangement… … Wikipedia
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reaction mechanism — Introduction in chemical reactions (chemical reaction), the detailed processes by which chemical substances are transformed into other substances. The reactions themselves may involve the interactions of atoms (atom), molecules (molecule),… … Universalium
Möbius–Hückel concept — The Möbius Hückel treatment is one of two predicting reaction allowedness versus forbiddeness. The concept is the counterpart of the Woodward Hoffmann approach. The methodology in this treatment utilizes the plus minus sign parity in proceeding… … Wikipedia
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