Add time:09/07/2019         Source:sciencedirect.com

An INDO study has shown that the title compound exists in two diastereomeric propeller-like conformations, a cis form (C3 symmetry), and a trans form (C1 symmetry). The cis form is more stable than the trans form by 0·75 kcal/mole. The two forms undergo ready conformational interconversion by the two-ring flip mechanism, with activation energies of ca. 6 kcal/mole.

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