Abstract
Quinone dimers connected with acetylene ( QAQ) and diacetylene linkages ( QAAQ) have been synthesized and their structure and electronic properties studied. X-ray analysis, DFT calculations, and UV–vis measurements showed that, unlike directly connected quinone dimers ( QQ), they had planar and thus efficiently extended π conjugation systems. The respective reduction potentials of QAQ and QAAQ were considerably raised, and QAQ thereby behaved as a mild oxidizing agent.
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