Cyclobutadiene and Related Compounds - M.P. Cava - Google Books

https://books.google.de/books?id=t63ILJENEH8C&pg=PA256#v=onepage

Cyclobutadiene and Related Compounds describes the four-membered carbocyclic compounds that have only trigonally hybridized carbon atoms in the ring. The book discusses the chemistry of cyclobutadiene and the substituted cyclobutadienes, including the…