“…3). Thus, there are two-dimensional nets parallel to both (100) and (010) which together form It is appropriate to compare the three-dimensional intermolecular aggregation in (I) with the one-dimensional aggregation in the simpler analogue (PhSO2)2CH2: this was not discussed in the original structure report (Glidewell, Lightfoot & Patterson, 1995), but it again depends solely upon C--H..-O hydrogen bonds• In (PhSO2)2CH2, one of the central C--H bonds and a neighbouring aromatic C--H bond in the molecule at (x, y, z) both act as donors to the same sulfone O atom in the molecule at (-1 ÷x, y, z), forming C(4) and C(7) chains parallel to [100] as well as R~ (7) rings, which combine to yield a C(4)C(7)[R1 (7)] chain-ofrings (Bernstein et al, 1995). The other central C--H bonds in the molecule at (x, y, z) acts as donor to a sulfone O atom at (1-x, -y, 1-z), so forming a centrosymmetric R~(8) ring: the R~(8) rings act as the rungs of a ladder whose uprights are pairs of the [100] chains.…”