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Dynamic Configurational Isomerism of a Stable Pentaorganosilicate

Authors

  • Erik P. A. Couzijn,

    1. Department of Chemistry, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Fax: (+31) 20-44-47488
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  • Marius Schakel Dr.,

    1. Department of Chemistry, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Fax: (+31) 20-44-47488
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  • Frans J. J. de Kanter Dr.,

    1. Department of Chemistry, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Fax: (+31) 20-44-47488
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  • Andreas W. Ehlers Dr.,

    1. Department of Chemistry, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Fax: (+31) 20-44-47488
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  • Martin Lutz Dr.,

    1. Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
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  • Anthony L. Spek Prof. Dr.,

    1. Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
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  • Koop Lammertsma Prof. Dr.

    1. Department of Chemistry, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands, Fax: (+31) 20-44-47488
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  • This work was supported by the Netherlands Foundation for Chemical Sciences (CW) with financial aid from the Netherlands Organization for Scientific Research (NWO). We thank Prof. G. W. Klumpp for helpful discussions and J. W. H. Peeters of the University of Amsterdam for exact mass determinations.

Abstract

original image

Ein Molekül mit drei Gesichtern: Zwei der drei möglichen Konfigurationen eines stabilen Silicats mit fünf Kohlenstoffsubstituenten sowie ein dynamisches Gleichgewicht zwischen ihnen über eine Berry-Pseudorotation wurden NMR-spektroskopisch nachgewiesen. Die thermodynamischen und kinetischen Daten für diesen Prozess wurden durch Rechnungen bestätigt. In der Bildmitte ist die Hauptkonfiguration (aus der Kristallstrukturanalyse des nBu4N+-Salzes) wiedergegeben.

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