Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Binary tree diagram representing a subset of rearrangements of a tetrasubstituted bullvalene. Each bullvalene isomer can undergo three different Cope rearrangements (Dataset S1). Four generations of rearrangements from the initially formed chiral bullvalene isomer from bullvalone 3 are shown. No enantiomeric pairs are found in this subset (see SI Appendix for details); many additional rearrangements are needed to reach the enantiomer of the initial isomer.
