摘要:
                                The title compound 2,3-dicyclopentadiene-2,3-dimethylbutane (C5H5CMe2Me2C5H5) I shows the typical staggered conformation of a highly substituted ethane derivative with the two largest substituents (C5H5) adopting a trans position. The molecule shows C-2 symmetry about the central C-C bond. Due to the high substitution, the central bond of the ethane is elongated to 160.0 pm (X-ray structure analysis) while the DFT calculation finds a value of 159.2 pm. (C) 2001 Elsevier Science B.V. All rights reserved.