carbenes

См. также в других словарях:

• carbenes — karbenai statusas T sritis chemija apibrėžtis ↑ *metilenas. atitikmenys: angl. carbenes rus. карбены …   Chemijos terminų aiškinamasis žodynas

• 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

• Carbene — In chemistry, a carbene is a highly reactive organic molecule containing a carbon atom with six valence electrons and having the general formula: R1R2C: (two substituents and two electrons). [Organic Chemistry R.T Morrison, R.N Boyd pp 473 478]… …   Wikipedia

• carbene — /kahr been/, n. the radical CH2 and its derivatives. [CARB + ENE] * * * ▪ chemistry Introduction       any member of a class of highly reactive molecules containing divalent carbon atoms that is, carbon atoms that utilize only two of the four… …   Universalium

• Transition metal carbene complex — A transition metal carbene complex is a organometallic compound featuring a divalent organic ligand. The divalent organic ligand coordinated to the metal center is called a carbene. Carbene complexes for almost all transition metals have been… …   Wikipedia

• Carbeno persistente — Saltar a navegación, búsqueda Un carbeno estable: 1,3 dimesitilimidazol 2 ilideno en un matraz Schlenk Un carbeno persistente (también conocido como carbeno estable o carbeno Arduengo) es un tipo de carbeno que demuestra estabilidad particular, a …   Wikipedia Español

• organometallic compound — ▪ chemical compound Introduction  any member of a class of substances containing at least one metal to carbon bond in which the carbon is part of an organic group. Organometallic compounds constitute a very large group of substances that have… …   Universalium

• Difluorocarbene — is the chemical compound with formula CF2. It has a short half life, 0.5 and 20 msec, in solution and in the gas phase, respectively.[1] Although highly reactive, difluorocarbene is an intermediate in the production of tetrafluoroethylene, which… …   Wikipedia

• RÉACTIONNELS (MÉCANISMES) — La loi de Lavoisier permet de définir pour toute réaction chimique un bilan matériel qui est habituellement exprimé sous la forme d’une ou de plusieurs équations de réaction. Un tel bilan ne traduit que d’une façon globale l’ensemble des… …   Encyclopédie Universelle

• Dihydroimidazol-2-ylidene — IUPAC name Dihydroimidazol 2 ylidene[ …   Wikipedia

• Cheletropic reaction — Pericyclic Reactions Cheletropic reactions are a type of pericyclic reaction. A pericyclic reaction is one that involves a transition state with a cyclic array of atoms and an associated cyclic array of interacting orbitals. A reorganization of σ …   Wikipedia