For model and details see: www.kingsbury.id.au/scsd_model/teropyrene A series of model cyclophanes, the teropyreneophanes, were synthesized by intricate chemistry by Bodwell and coworkers. Several examples of systems of type 11 with 6-9 C-atom apical bridges were crystallographically identified [x = 4, CCDC: JUWSOM; x = 3, QEYCOO; x = 2, GUHSEI; x = 1, NOKJAB ] and their SCSD values are shown in Table . From this data, we can observe the shape effects of decreasing strap length. The increase in out-ofplane distortion along B1u and the corresponding in-plane Ag distortion with decreasing strap length is approximately linear, allowing for extrapolation of the obtained values -for example, the x = 0 example (a -CMe2(CH2)4CMe2-strap, hypothetical) can be expected to hold values of Ag: 44 -46 Å and B1u: 58.4 -59.6 Å with this linear approximation (Fig. ). From this data we can make reasonable assumptions about the likely shape of molecules in the series, and potentially about apically strapped polyaromatics generally -that major B1u bending distortion is approximately linear with strap length, and two types of minor distortional affect are present, but not generally simultaneously, depending on whether the (CH2)n chain repeat number n is even (A2) or odd (B2).