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.
1H-NMR spectral monitor (300 MHz in CDCl3) of the thermolysis of trans-cyclobutane 1 at 150 (±0.2)°C. Notations above the spectra provide peak assignments and are given as follows: ∗, cyclobutane 1; †, styrene 3; O, diene 4; and X, isomers of 12.
