Comparison of the Geometries of 3,7,10-Tribenzyl-3,7,10-triaza[3.3.3]propellane, (1), 7,10-Dibenzyl-3-p-tolyl-3,7,10-triaza[3.3.3]propellane, (2), and 7,10-Dibenzyl-3-oxa-7,10-diaza[3.3.3]propellane, (3)

Room-temperature crystal structures are reported for three analogous [3.3.3]propellanes. Compound (1), C₂₉H₃₃N₃, is trigonal, (2), C₂₉H₃₃N₃, triclinic and (3), C₂₂H₂₆N₂O, orthorhombic. All three molecules have eclipsed conformations about the central conjoining bond, and the five-membered rings all have envelope conformations (C_s-m symmetry).

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