Figure 4
The crystal packing diagram of compound (II) (drawn as purple and pink sticks) viewed along: (a) the b axis (the center of the P1—C1 bond that coincides with the twofold screw axis is denoted with a grey dot); (b) the a axis; (c) along the b axis with the bifurcated hydrogen bonds shown as dashed lines (see Table 2 for details). H atoms have been omitted for clarity in parts (a) and (b) and only those involved in hydrogen bonding are shown in (c). |