Abstract
Differential scanning calorimetry, thermogravimetry and mass spectral analysis studies as a function of temperature were carried out for the photoproducts derived from the photosensitized cycloaddition reactions between different furan and thiophene derivatives and methyl substituted maleic anhydrides and maleimides. It was found that the photoproducts melt with partial decomposition followed by evaporation of the undecomposed material as well as the decomposition products. This investigation may serve to establish a general pattern in the thermal behaviour of this family of compounds containing as a common feature a four-membered ring between a five-membered heterocycle and a five-membered anhydride ring.
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