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Synthesis and Molecular Structures of Tetrasilyl Ethers of Calix[4]arenes
Author(s) -
Strasser Ulf H.,
Neumann Beate,
Stammler HansGeorg,
Mitzel Norbert W.
Publication year - 2010
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201000007
Subject(s) - conformational isomerism , chemistry , deprotonation , sodium hydride , solvent , nuclear magnetic resonance spectroscopy , calixarene , hydride , sodium salt , salt (chemistry) , mass spectrometry , polymer chemistry , medicinal chemistry , molecule , stereochemistry , organic chemistry , ion , inorganic chemistry , hydrogen , chromatography
The tetrasilyl ethers calix[4]areneOSiMe 2 R ( R = Me, H, vinyl, allyl) were prepared by salt elimination; the calix[4]arene was deprotonated with sodium hydride and subsequently reacted with chlorosilanes ClSiMe 2 R . In general, DMF was chosen as solvent in order to steer the reactions in terms of a preference for the cone ‐conformation of the products. In the case of calix[4]areneOSiMe 3 both, partial‐cone ‐ and cone ‐conformers, were synthesised. All products were characterised by NMR ( 1 H, 13 C, 29 Si) spectroscopy, mass spectrometry and single‐crystal X‐ray diffraction.