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Figure 1 Molecular view of the cation with the atom-labelling scheme. Displacement ellipsoids are drawn at the 50% probability level. Hydrogen atoms are omitted for clarity. [Symmetry codes: (i) z, x, y; (ii) y, z, x; (iii) −x + , y, −z + ; (iv) −x + , −y + , z; (v) x, −y + , −z + ] |