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NMR determination of dynamic parameters of CH3 groups in P(CH3)4SbCl6

✍ Scribed by Wojciech Medycki; Ryszard Jakubas

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
96 KB
Volume
15
Category
Article
ISSN
0926-2040

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✦ Synopsis

The longitudinal relaxation time T and the second moment M of 1 H NMR line in a wide temperature range have been 1 2 Ε½ . measured for P CH SbCl . It was found that two different methyl groups in each tetramethylphosphonium cation perform 3 4 6 two different rates of C motions. The reduction of the proton second moment M just below the temperature of the phase 3 2 w Ε½ . x q transition T s 350 K may suggest that the isotropic tumbling of the whole cation P CH is involved in the structural c2 3 4 w x y change of the crystal lattice induced by the movements of the SbCl anion.

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