Although the behavior of the more complex conjugated unsaturated systems has been the subject of an increasing number of investigations during recent years, little attention has yet been given to the dienine system,-C= CC= CC= C-. Vinylacetylene and divinylacetylene have recently been obtained by the polymerization of acetylene1 and a few of their reactions have been described, but little is known concerning the higher members of this series of ...
