Excerpt from The Synthesis of Di-Aryl Thiophenes, Di-Aryl Selenophenes, and Related Compounds: DissertationIt is apparent therefore, that although the di-aryl thiophenes have been prepared before, yet up to the present, no entirely satisfactory method has been developed for preparing them in a pure state. Hereto fore, there always resulted a mixture of the two isomers and the yield obtained was very small.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.