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Diacetylenic dehydrobenzo[12]annulene and dehydrobenzo[18]annulene derivatives with electron-donor and -acceptor groups were synthesized (including push–pull Eglinton–Galbraith dimer derivative 1c) via an oxidative coupling reaction, and spectroscopically and structurally characterized. The solid–solid phase transition in 1b has been revealed at 45°C by DSC measurements. Its room temperature crystal...
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