Pentagermapyramidane: Crystallizing the "Transition-State" Structure

The first example of the homonuclear pyramidanes, pentagermapyramidane, was synthesized, fully characterized, and computationally studied to reveal its peculiar structural features and the nature of its apex‐to‐base bonding interactions. Both solid‐state and solution structures of pentagermapyramida...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2015-05, Vol.54 (19), p.5654-5657
Main Authors: Lee, Vladimir Ya, Ito, Yuki, Gapurenko, Olga A., Sekiguchi, Akira, Minkin, Vladimir I., Minyaev, Ruslan M., Gornitzka, Heinz
Format: Article
Language:English
Subjects:
Bonding
cage compounds
Chemical Sciences
Computation
Coordination chemistry
Crystal structure
Crystallization
density functional calculations
Distortion
germanium
Minima
NMR spectroscopy
Potential energy
Pyramids
Stability
X-ray diffraction
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Summary:The first example of the homonuclear pyramidanes, pentagermapyramidane, was synthesized, fully characterized, and computationally studied to reveal its peculiar structural features and the nature of its apex‐to‐base bonding interactions. Both solid‐state and solution structures of pentagermapyramidane are discussed based on the computed stabilities of its square‐pyramidal and distorted forms. Germanium pyramids: The homonuclear pentagermapyramidane Ge[Ge4(SiMetBu2)4] (1) was synthesized and characterized. Crystal structures of two structural variations of 1 are reported: the distorted pyramidal structure 1 a, corresponding to the energy minima on the Ge5R4 potential energy surface (PES), and the square‐planar pyramidal 1 b, representing a transition state on the PES.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201500731