Arsatriptycene and phosphatriptycene

9-Substituted Triptycene as a Probe for the Study of Internal Rotation around a C−PH Bond in the Solid State: A Single Crystal EPR Study at Variable Temperature

“…The twinning and/or disorder with interchange of the bridgehead carbon atom observed in 2 is closely related to those observed for arsatriptycene and phosphatriptycene. 40 This last compound shows a twinning through a plane with the molecules in general positions, whereas in 2 an inversion twin was observed with molecules located on 3-fold axes. The atomic coordinates for 2 are given in Table 1, and a perspective view of the molecule is shown in Figure 1 7) ) 66°).…”

Molecular structures of the 1,6-disubstituted triptycenes Sb2(C6F4)3and Bi2(C6F4)3using gas-phase electron diffraction and ab initio and DFT calculations

“…Similar deviations from 120 • were previously noted in some hydrogen-substituted triptycenes, where the lack of high symmetry was attributed to crystal forces. 6 It has also been noted that although triptycenes are depicted as totally rigid systems, it may be the case that they behave as rigid aromatic rings that are connected flexibly via the bridgehead atoms. 7 These studies concerning the structures of Sb 2 (C 6 F 4 ) 3 and Bi 2 (C 6 F 4 ) 3 as determined by gas-phase electron diffraction and theoretical methods should add to the structural understanding of the Group 15 1,6-disubstituted triptycenes.…”

3-tert-Butyl-9,10-dihydro-9,10-o-benzeno-9-phosphaanthracene

“…The investigation of the title compound, a derivative of arsatriptycene, was undertaken to obtain information about the geometry around the As atom. The crystal structure determination of arsatriptycene itself (Freijee & Stam, 1980) did not yield reliable results because of orientational disorder. The disorder is such that a fraction of the molecular sites in the ideal ordered structure are occupied by molecules rotated by 180 ° about a quasi-twofold axis perpendicular to the As-C axis of the molecules.…”