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Figure 1 (a) A schematic representation of the two independent conformations of RBB found at 93 K, where RBB-A illustrates the diethylamino substituents on the same side while in RBB-B they are on opposite sides, of the xanthene plane. (b) The disordered structure of the title molecule at room temperature, where the major and minor disorder components are depicted as solid and dotted lines, respectively. |