A kinetic scheme for catalytic isomerization through a cyclopropane-reduced metal oxide intermediate: [S6] (n = 1), and [S7] (n = 2); Fig. 1 of Mango. [S] is a cyclopropyl-transition metal complex formed from some substrate S. The actual structure of [S] is unspecified and should not be inferred from the figure (see Mango for discussion). Cyclopropanes may or may not exist as distinct entities. However, their inclusion as distinct entities coordinated to a catalytic site best illustrates the hypothetical process where three isomers are kinetically linked to a common intermediate.