Dynamic disorder in solid tetrakis(trimethylstannyl)methane, C(SnMe3)4, investigated by one- and two-dimensional variable-temperature119Sn and13C NMR spectroscopy

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Bernatowicz, Piotr ; Dinnebier, Robert E. ; Helluy, Xavier ; Kümmerlen, Jörg ; Sebald, Angelika:
Dynamic disorder in solid tetrakis(trimethylstannyl)methane, C(SnMe3)4, investigated by one- and two-dimensional variable-temperature119Sn and13C NMR spectroscopy.
In: Applied Magnetic Resonance. Bd. 17 (1999) Heft 2 . - S. 385-398.
ISSN 1613-7507
DOI: https://doi.org/10.1007/BF03162173

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Abstract

Modes of molecular reorientation in solid tetrakis(trimethylstannyl)methane, C(SnMe3)4, have been investigated by one- and two-dimensional13C and119Sn static and magic-angle spinning nuclear magnetic resonance spectroscopy (NMR) in the temperature range from 150 to 290 K. Spectral lineshape fitting of one- and two-dimensional119Sn NMR experiments shows the pseudo-fivefold disorder previously observed by single-crystal X-ray diffraction on C(SnMe3)4 to be dynamic disorder (activation energy Ea ≅ 32 kJmol−1). A dynamic-disorder model where each tin atom in a C(SnMe3)4 molecule occupies the twenty sites of a nearly perfect pentagonal dodecahedron with equal probability agrees best with the experimental solid-state NMR results.