Figure 1
The two independent orientations of the molecule of isomer (I), showing the atom-labelling scheme. In orientation 1, the bonds are shown as solid lines, and in orientation 2, the bonds are shown as dashed lines. The solid bond C11_1—C12_1 is effectively hidden behind the dashed bond C21_2—C22_2. Displacement ellipsoids are drawn at the 30% probability level. |