Abstract
Carbon-13 longitudinal relaxation times of singly and doubly 13C-labeled sodium acetates are presented and compared. In this system, in which the 13C indirect coupling is weak, the effect of the second 13C is just that expected on introduction of the 13C 13C dipolar interaction as an additional relaxation mechanism. This effect is quite small, and dipolar cross relaxation between 13C's is negligible.
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