Exclusivity of the sp Rotamers of 9-(o-tert-Butylphenyl) fluorene and 9-(o-tert-Butylphenyl)-9-fluorenol in Solution and the Crystalline State

PD Robinson, Y Hou, HG Lutfi…

Index: Robinson, Paul D.; Hou, Yuqing; Lutfi, Hisham G.; Meyers, Cal Y. Acta Crystallographica Section C: Crystal Structure Communications, 1998 , vol. 54, # 1 p. 73 - 77

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Citation Number: 12

Abstract

Both 9-(o-tert-butylphenyl) fluorene (C23H22) and 9-(o-tert-butylphenyl)-9-fluorenol (C23H22O) maintained sp rotameric structures exclusively in crystalline form as well as in solution. This result is in contrast to that obtained for the corresponding 9-(o- isopropylphenyl) fluorene and 9-(o-isopropylphenyl)-9-fluorenol. In-plane sterically imposed distortion of the tert-butyl group is exhibited in sp-9-(o-tert-butylphenyl) fluorene and to a ...