A recent paper by Kieliszek and Malinska comprehensively described the various conformations of H8TBC [8] observed in a range of solvated crystal structures, surveying the Cambridge Structural Database in the process, to provide an excellent overview. A range of intra-and intermolecular interactions are involved in stabilising common conformations observed in the solvates studied, these being chair-loop, chair and pleated-loop (Fig. ). An excellent early example of how the versatility of H8TBC [8] can be exploited in hostguest chemistry is its ability to selectively complex C60 from a range of fullerenes in soot. In this case, the hosts adopt a double-cone conformation, encapsulating C60 molecules to form a complex that can then be harvested in crystalline form and deconstructed to afford pure buckminsterfullerene. In this article we provide a review of the coordination chemistry of p-tert-butylcalix [8]arene with 3d transition (limited to V -Cu) and 4f lanthanide metal ions, including our own work in the area, with an emphasis on prevailing magnetic properties. We also provide our thoughts and perspectives on the common structural themes observed, identify gaps in knowledge and evaluate how that may inform and direct future synthetic efforts. A search of the Cambridge Structural Database (CSD, July 2024) and the literature for ptert-butylcalix [8]arene-supported transition (V -Cu) and lanthanide metal complexes results in 39 hits (Table ). Of these, 11 are homometallic 3d complexes, 3 are heterometallic 3d-4/5d complexes, 7 are heterometallic 3d-s complexes, 2 are heterometallic 3d-p complexes, 9 are homometallic 4f complexes, 4 are heterometallic 3d-4f complexes, 2 are heterometallic 3d-5f complexes, and 1 is a heterometallic 4f-s complex. The smallest contains a single metal ion and the largest a total of eighteen metal ions.