Path selection for conformational interconversions in [2]catenanes |
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Authors: | Halterman Ronald L Martyn David E Pan Xingang Ha Diana B Frow Michael Haessig Kathryn |
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Institution: | Department of Chemistry and Biochemistry, University of Oklahoma, Norman, 73019, USA. rlhalterman@ou.edu |
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Abstract: | strucure: see text]The conformational interconversions of several 2]catenanes containing a dibenzo-34-crown-10 ether (BPP34C10) interlocked with rings containing two 4,4'-dipyridyls tethered by different aryl spacers have been studied. Blocking groups on the tethers enabled the two pathways for circumrotation of the BPP34C10 to be open or blocked. The activation barrier for migration along the open tethers varied from 11 to 13 kcal/mol. This study demonstrates an ability to select the pathway for conformational interconversions in 2]catenanes. |
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