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13C magic angle spinning NMR investigations of thiourea inclusion compounds

✍ Scribed by Klaus Müller

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
410 KB
Volume
30
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Thiourea inclusion compounds of three monosubstituted cyclohexanes were studied by ^13^C magic angle spinning NMR spectroscopy. Variable‐temperature experiments were performed to evaluate the conformational and motional features of the various guest molecules. From a quantitative line‐shape analysis it is found that the halocyclohexanes with chloro and bromo substituents exist predominantly in the axial conformation whereas methylcyclohexane, as in solution, prefers the equatorial position. Generally, it could be shown that within the temperature range investigated the cyclohexane guest molecules undergo ring inversion processes with kinetic parameters almost unaffected by the host lattice.

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