bridged by two O-atoms from two tea ligands, . The only exception to this is between Fe6-Fe7 where one of the triethanolamine arms is protonated/non-bonded and replaced in the bridging unit by the sole μ-OMe ligand (Fe6-O19-Fe7) in the cluster, [Fe-(μ-Otea)(μ-OMe)-Fe]. This moiety is therefore responsible for the asymmetry of the wheel, with the magnetic core of the molecule being [Fe11(μ-Otea)21(μ-OMe)1]. The triethanolamine ligands are of three types (Figure ). Seven are μ4-bridging ) with two O-atoms bridging two Fe ions, and one O-atom bridging between Fe-Zn. Three are μ3-bridging ) with two O-atoms bridging two Fe ions, and one O-atom being terminally bonded. The remaining ligand is μ3bridging ) with one O-atom bridging two Fe ions, one bridging between Fe and Zn, and the third being non-bonded. The Fe-O-Fe angles fall within the range ~101.6-107.7°. The Fe ions are all six coordinate and in distorted octahedral geometries, while the Zn ions are four coordinate and tetrahedral -the remaining two coordination sites on each Zn ion being occupied by Cl ions. The non-bonded HO-arm of the Htea ligand is oriented towards and above the cavity of the wheel and Repetition of the synthetic procedure that produces 1, but in DMF/MeCN affords 2 after 4 days (Figure ). 2 crystallises in the tetragonal space group I41/a (see the SI for full details; Table , Figure ). In essence, compound 2 is the symmetric analogue of 1, with the twelve tea ligands now of just two types: one µ3bridging ligand ) followed by two µ4-bridging ligands ) as the wheel is circumnavigated. The result is that the metallic skeleton becomes bowl-or U-shaped rather than S-shaped, with the magnetic core of the molecule being [Fe12(μ-Otea)22] (Figure , Tables ). In the extended structure of 2 wheels pack in a head-to-tail fashion along the c-axis of the cell with a square of H2O molecules (O•••O, ~2.86 Å) sitting between the wheels mediating H-bonding interactions to the O-arms of the tea ligands (O•••O, ~2.63 Å). The result is the formation of tubular arrays of wheels down the c-axis. In the ab plane closest intermolecular interactions are mediated between the Cl atoms and tea ligands (C(H)•••Cl, ~3.6 Å) resulting in a regular square grid of wheels. Overall, this leads to the aesthetically pleasing packing structure shown in Fig. .