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Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 56:627-631
A number of heterocyclic compounds have been synthesised, including diphenylene oxide, diphenylene sulphide, diphenylene selenide and diphenylene diselenide (selenanthren). Treatment of o-phenylphenol with 70% sulphuric acid affords not diphenylene b