mesoionic compound

mesoionic compound
any of a class of compounds having five-membered ring heterocycles (or their benzo derivatives) which possess a sextet of π-electrons in association with the atoms comprising the ring, but which cannot be represented by any one covalent or polar structure; typically the ring structure contains both positive and negative delocalised charges which cannot be associated with any one ring atom, and the negative charge can also be associated with a conjugated exocyclic atom (typically oxygen, sulfur, or nitrogen).

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  • mesoionic compound — mezojoninis junginys statusas T sritis chemija apibrėžtis Dipolinis penkianaris heterociklinis junginys, kurio struktūros negalima pavaizduoti įprastine kovalentine formule. atitikmenys: angl. mesoionic compound rus. мезоионное соединение …   Chemijos terminų aiškinamasis žodynas

  • mesoionic — adjective of, or relating to a mesoionic compound …   Wiktionary

  • delocalized — adjective describing the π electrons in a conjugated, aromatic or mesoionic compound that are not associated with any particular atom or bond …   Wiktionary

  • mezojoninis junginys — statusas T sritis chemija apibrėžtis Dipolinis penkianaris heterociklinis junginys, kurio struktūros negalima pavaizduoti įprastine kovalentine formule. atitikmenys: angl. mesoionic compound rus. мезоионное соединение …   Chemijos terminų aiškinamasis žodynas

  • мезоионное соединение — mezojoninis junginys statusas T sritis chemija apibrėžtis Dipolinis penkianaris heterociklinis junginys, kurio struktūros negalima pavaizduoti įprastine kovalentine formule. atitikmenys: angl. mesoionic compound rus. мезоионное соединение …   Chemijos terminų aiškinamasis žodynas

  • Sydnone — is a mesoionic heterocyclic aromatic chemical compound. A sydnone imine in which the keto group of sydnone (=O) has been replaced with an imino (=NH) group can be found as a substructure in the stimulant drugs feprosidnine and mesocarb. Chemical… …   Wikipedia

  • Sydnone imine — is a mesoionic heterocyclic aromatic chemical compound. Sydnone imine is the imine of sydnone where the keto functional group of sydnone (=O) has been replaced with an imine (=NH) group. A sydnone imine substructure can be found in the stimulant… …   Wikipedia

  • Molsidomine — IUPAC name 1 Ethoxy N (3 morpholino 5 oxadiazol 3 iumyl)methanimidate …   Wikipedia

  • Münchnone — is a mesoionic heterocyclic aromatic chemical compound. Contents 1 Other Names 2 Discovery and Utility 3 Chemical structure 4 See also …   Wikipedia

  • Сидноны — Химическая структура сиднона Сиднон – это мезоионное гетероциклическое ароматическое соединение …   Википедия

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