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We report the design, synthesis, thermal properties, and dynamic NMR characterization of four new molecular dirotors, each containing two rotary 1,4-diethynyl phenylene units, a bridging 1,3-bis(diphenylmethyl) benzene stator, and two capping triphenylmethyl groups. These compounds are variations of the well-known wheel and axle structures. Ambient temperature quadrupolar echo 2 H NMR spectra...
The unimolecular reactivity and stereoselectivity of four arylalkyl carbenes generated by a steady state irradiation of crystalline 1,2-diaryldiazopropanes were correctly predicted by taking advantage of known reaction trajectories applied to structures obtained by simple molecular mechanics calculations. It is suggested that the conformation of the diazo compound in the crystal determines the conformation...
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