Figure 3
Part of the crystal structure of (IV) showing the formation of one of the R66(30) rings making up the (6,3) net. Atom labelling is as in Okaya (1969). For the sake of clarity, H atoms not involved in hydrogen bonding have been omitted. Atoms marked with an asterisk (*) or hash (#) are at the symmetry positions (−x, ½ + y, ½ − z) and (1 − x, −y, 1 − z), repectively. |