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Figure 3
HyperChem
TM
superimposed image of (
a
) (I)
versus
(II) with an r.m.s. error of 0.104 Å and (
b
) (III)
versus
(IV) with an r.m.s. error of 0.025 Å. Counterions have been omitted for clarity.
© International Union of Crystallography 2013