It is usually assumed that spin-spin couplings except those involving fluorine-fluorine interactions are negligibly small over more than three bonds in saturated systems. At this time, we should like to report four examples of H-H and H-F spin-spin couplings that involve more than three consecutive single bonds. Each of these systems is characterized by having either fixed or at least reasonably favored geometrical conformations.
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Davis et al. (1961) studied this question.