Two tripods (1 and 2) featuring pyrimidinyl pendant arms have been synthesized from 5-(1H-pyrazol-3-yl)-pyrimidine (5) and 1,3,5-tribromomethylbenzene derivatives. Reaction with three equivalents of [Pd(bipy)](NO₃)₂ to form a macrotricycle closed by palladium coordination unexpectedly afforded the mononuclear species [Pd(1)(bipy)]²⁺ and [Pd(2)(bipy)]²⁺. These complexes show fluxional behavior on the ¹H NMR timescale, the [Pd(bipy)]²⁺ fragment hopping between the pyrimidinyl coordinating moieties. The ΔG_c^‡’s estimated by the coalescence method are temperature independent, which means that ΔS_c^‡=0. This indicates that the “merry-go-round” process of [Pd(bipy)]²⁺ occurs intramolecularly, presumably by nucleophilic attack of the free pyrimidinyl arm to the bound Pd²⁺ center. This phenomenon permits to quantify the lability of the Pd–N coordination bond, the average ΔG_c^‡ ≈ ΔH_c^‡ value being 70kJmol^–1.