Study of plastic mixed crystals of light and perdeuterated sulfolanes.1H and2H NMR spectra and semiempirical calculation

Akimov, M. N.; Bezrukov, O. F.; Struts, Andrey V.; Ustimov, V. I.

doi:10.1007/bf00752787

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“…Because of the larger errors in our 13 C T 1 ρ measurements we were unsure whether the phase change III → IV would be visible using our methods. The plastic phases of sulfolane have previously been studied by 1 H and 2 H NMR . We note that Lambert et al gave the plastic to crystalline phase transition at 288 K a free energy of activation mistaking it for a coalescence.…”

Section: Resultsmentioning

confidence: 87%

Five-Membered Ring Rotations, Pseudorotations, and Hydrogen Bond Exchange Dynamics in the Solid State Studied by NMR Spectroscopy

et al. 1997

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13C CP/MAS NMR studies were carried out on trans-1,2-cyclopentanediol, on 4,4-dimethyl-trans-1,2-cyclopentanediol, and on sulfolane at variable temperatures. The spectra showed evidence of three dynamic solid-state processes: hydrogen bond exchange, ring pseudorotation, and whole molecule rotations about local C 2 axes. Fitting of T 1 ρ data to calculated values of the 13C−1H dipolar interactions allowed differentiation between ring pseudorotations and whole molecule C 2 reorientations. Isotopic 1H/2H substitution demonstrated the existence of hydrogen bond exchange processes in the diols. Activation parameters for these processes were derived from both coalescence measurements and the T 1 ρ measurements.

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Section: Resultsmentioning

confidence: 87%

Five-Membered Ring Rotations, Pseudorotations, and Hydrogen Bond Exchange Dynamics in the Solid State Studied by NMR Spectroscopy

et al. 1997

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Birefringence and orientational order in two-component plastic methylchloromethanes

1995

Phys. Rev. B

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Study of plastic mixed crystals of light and perdeuterated sulfolanes.1H and2H NMR spectra and semiempirical calculation

Cited by 2 publications

References 2 publications

Five-Membered Ring Rotations, Pseudorotations, and Hydrogen Bond Exchange Dynamics in the Solid State Studied by NMR Spectroscopy

Five-Membered Ring Rotations, Pseudorotations, and Hydrogen Bond Exchange Dynamics in the Solid State Studied by NMR Spectroscopy

Birefringence and orientational order in two-component plastic methylchloromethanes

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