Abstract
A number of symmetrical
dipyrrylthiones have been prepared by the action of thiophosgene on the
appropriate 5-unsubstituted pyrrole. From an examination of their spectroscopic
properties it is concluded that these compounds exist predominantly as the
thione tautomer. Some chemical properties of the system are described including
the conversion of the thiones into ketones by treatment with alkaline peroxide.
The mass spectra of dipyrrylthiones and dipyrrylketones are compared.
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