Über die struktur der aus maleinsäureanhydrid in gegenwart organischer basen erhaltenen polymeren

The structure of the dark polymers of maleic anhydride obtained in the presence of triethylamine and pyridine was investigated. A cis-polyvinyleneketoanhydride structure is suggested for the polymer obtained with triethylamine. The polymer obtained with pyridine is a cis-polyvinyleneketoanhydride but other structural units are also present in its chain (cyclopentanone, maleic anhydride). The polymers display the characteristic properties of polyconjugated polymers: dark colour, signal of electron paramagnetic resonance and solubility only in polar solvents.