Abstract
The analogy between the intracoupling pathways of stationary [A] n () cluster systems, under various forms of the symmetric group, and the mechanisms of coherence transfer in r.f. irradiated [A…X] spin systems, properly described by coherent superpositional bases over Liouville space, is extended by correlating Listerud and Drobny's work on the coherence transfer problem with some recent work on J pathways in spin clusters, in the context of a general NMR theorem concerning the latter.