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Structural applications of nuclear spin-lattice relaxation times

The structural utility of three mechanisms of nuclear spin relaxation are considered. Examples illustrating the applicability of nuclear-nuclear dipolar relaxation in determining molecular microdynamics and solution geometry are presented. The use of spin-rotation relaxation to determine barriers to CH3 groups rotations and an example of quadrupole relaxation of deuteriums to probe molecular motion are discussed. An experimental method for determining relaxation times is briefly analysed.