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Acta Cryst. (2002). E58, o1010-o1012 [ doi:10.1107/S1600536802013089 ]
New C2-symmetric cyclopentadiene dimer from sodium naphthalenide reduction of 1,3,6-tri-tert-butylfulvene
S. Bragg, J. E. B. Johnson, G. M. Graziano, G. J. Balaich and N. E. Heimer
Abstract: The sodium naphthalenide reduction of 1,3,6-tri-tert-butylfulvene gave the dimer, rac-3,4-bis(1,4-di-tertbutylcyclopenta-1,3-dien-2-yl)-2,2,5,5-tetramethylhexane [C36H62, (II)] after protonation of the disodium salt of the bis(cyclopentadienylethane) intermediate. Bond distances and angles for (II) are consistent with a bis(cyclopentadiene) structure. The ansa bridge bond is long, at 1.592 (2) Å. The substitution pattern on the cyclopentadiene rings, as well as the ansa bridge, result in an overall C2 symmetry for (II).
Online 23 August 2002
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