| dbo:abstract |
A pyramidal carbocation is a type of carbocation with a specific configuration. This ion exists as a third class, besides the classical and non-classical ions. In these ions, a single carbon atom hovers over a four- or five-sided polygon, in effect forming a pyramid. The four-sided pyramidal ion will carry a charge of 1+, and the five-sided pyramid will carry 2+. In the images (at upper right), the black spot on the vertical line represents the hovering carbon atom. The apparent coordination number of five, or even six, associated with the carbon atom at the top of the pyramid is a rarity as compared to the usual maximum of four. (en) Een piramidaal carbokation is een positief ion waarin de lading verdeeld is over meerdere koolstofatomen die samen een vier of vijfzijdige piramide vormen. Het in eerste instantie meest opvallende kenmerk van deze ionen wordt gevormd door het feit dat het koolstofatoom in de top van de piramide gebonden is aan vijf of zes andere atomen. Dat aan de fundamentele vierwaardigheid van koolstof niet getornd wordt blijkt uit de theoretische beschouwing. (nl) Um carbocátion piramidal é um tipo de carbocátion com uma configuração específica. Este íon existe como uma terceira classe, além dos íons clássicos e . Nesses íons, um único átomo de carbono paira sobre um polígono de quatro ou cinco lados, formando uma pirâmide. O íon piramidal de quatro lados carrega uma carga de 1+ e o piramidal de cinco lados carrega 2+. Nas imagens (no canto superior direito), o ponto preto na linha vertical representa o átomo de carbono pairando. O número aparente de coordenação de cinco, ou mesmo seis, associado ao átomo de carbono no topo da pirâmide é uma raridade em comparação com o máximo habitual de quatro. (pt) |
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dbt:Cvt dbt:Technical |
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dbc:Cations dbc:Reactive_intermediates |
| rdfs:comment |
Een piramidaal carbokation is een positief ion waarin de lading verdeeld is over meerdere koolstofatomen die samen een vier of vijfzijdige piramide vormen. Het in eerste instantie meest opvallende kenmerk van deze ionen wordt gevormd door het feit dat het koolstofatoom in de top van de piramide gebonden is aan vijf of zes andere atomen. Dat aan de fundamentele vierwaardigheid van koolstof niet getornd wordt blijkt uit de theoretische beschouwing. (nl) A pyramidal carbocation is a type of carbocation with a specific configuration. This ion exists as a third class, besides the classical and non-classical ions. In these ions, a single carbon atom hovers over a four- or five-sided polygon, in effect forming a pyramid. The four-sided pyramidal ion will carry a charge of 1+, and the five-sided pyramid will carry 2+. In the images (at upper right), the black spot on the vertical line represents the hovering carbon atom. (en) Um carbocátion piramidal é um tipo de carbocátion com uma configuração específica. Este íon existe como uma terceira classe, além dos íons clássicos e . Nesses íons, um único átomo de carbono paira sobre um polígono de quatro ou cinco lados, formando uma pirâmide. O íon piramidal de quatro lados carrega uma carga de 1+ e o piramidal de cinco lados carrega 2+. Nas imagens (no canto superior direito), o ponto preto na linha vertical representa o átomo de carbono pairando. (pt) |
| rdfs:label |
Piramidaal carbokation (nl) Pyramidal carbocation (en) Carbocátion piramidal (pt) |
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