A Solid-State NMR Study of Tungsten Methyl Group Dynamics in [W(η5-C5Me5)Me4][PF6]

1996 ◽  
Vol 118 (24) ◽  
pp. 5665-5671 ◽  
Author(s):  
Douglas C. Maus ◽  
Valérie Copié ◽  
Boqin Sun ◽  
Janet M. Griffiths ◽  
Robert G. Griffin ◽  
...  
Keyword(s):  
Solid State ◽  
Group Dynamics ◽  
Solid State Nmr ◽  
Methyl Group ◽  
Nmr Study ◽  
Methyl Group Dynamics

Deuterium NMR study of methyl group dynamics inL‐alanine

1987 ◽  
Vol 86 (9) ◽  
pp. 4730-4736 ◽  
Author(s):  
Kebede Beshah ◽  
Edward T. Olejniczak ◽  
Robert G. Griffin
Keyword(s):  
Group Dynamics ◽  
Deuterium Nmr ◽  
Methyl Group ◽  
Nmr Study ◽  
Methyl Group Dynamics

Investigation of Methyl Reorientations in 1,4-Dimethoxy- 2,6-dimethylbenzene by NMR and Inelastic Neutron Scattering

1979 ◽  
Vol 34 (5) ◽  
pp. 631-645 ◽  
Author(s):  
R. A. Wind ◽  
W. M. M. J. Bovée ◽  
J. C. F. Kupers ◽  
J. Smidt ◽  
Chr. Steenbergen
Keyword(s):  
Solid State ◽  
Neutron Scattering ◽  
Liquid State ◽  
Solid State Nmr ◽  
Inelastic Neutron Scattering ◽  
Nmr Relaxation ◽  
Inelastic Neutron ◽  
Methyl Groups ◽  
Methyl Group ◽  
Nmr Study

Abstract In this paper a solid state NMR relaxation study and inelastic neutron scattering (INS) experiments (the latter in the solid and liquid phase) are reported for a molecule containing methyl groups in different surroundings, namely 1,4-dimethoxy-2,6-dimethylbenzene. The results are compared with each other and with those of a liquid state NMR study reported earlier. It is found that in this way both the shapes and magnitudes of the various hindering potentials can be determined. The result is that the methyl groups 1, 2 and 4 possess a threefold cosine-shaped potential with heights given by 7.7, 9.0 and 15.0 kJ/mol according to the solid state NMR measurements (from the INS study the values 7.5, 7.5 and 16.0 kJ/mol were obtained). For methyl group 6 a mixture of a three-and six-fold symmetry had to be taken into account in order to explain the experiments. Except for methyl group 4 the liquid state NMR results deviate from those obtained with the other two techniques. A possible cause for this discrepancy is discussed. For the molecular structure it is concluded that the reorientations of the methyl groups 1 and 2 are influenced by mutual hindering and that the angle between the plane through the C4-O-C bond and the aromatic plane is small, whereas for the C1-O-C bond this angle is estimated to be about 70°.

Methyl group dynamics in methyl p-nitrobenzenesulfonate by solid-state deuterium NMR

1995 ◽  
Vol 355 (1) ◽  
pp. 143-146 ◽  
Author(s):  
Toshifumi Hiraoki ◽  
Tatsuo Hamada ◽  
Akihiro Tsutsumi
Keyword(s):  
Solid State ◽  
Group Dynamics ◽  
Deuterium Nmr ◽  
Methyl Group ◽  
Methyl Group Dynamics

scholarly journals Methyl Group Dynamics in Poly(β-methyl L-aspartate) by Solid State 2H NMR

1994 ◽  
Vol 26 (6) ◽  
pp. 766-769 ◽  
Author(s):  
Toshifumi Hiraoki ◽  
Koji Tomita ◽  
Akiyoshi Kogame ◽  
Akihiro Tsutsumi
Keyword(s):  
Solid State ◽  
Group Dynamics ◽  
2H Nmr ◽  
Methyl Group ◽  
Methyl Group Dynamics
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