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      1,3,4-惡二唑|1,3,4-Oxadiazole

      1,3,4-惡二唑是一種含氮和氧的雜環,是惡二唑的四個異構體之一,是用用的中間體。1,3,4-Oxadiazole is a thermally stable neutral aromatic molecule. Other aromatic systems are 1,3,4-oxadiazolium cations and the exocyclic-conjugated mesoionic 1,3,4-oxadiazoles and 1,3,4-oxadiazolines . Also known are derivatives of the non-aromatic reduced systems, 2,3-dihydro-1,3,4-oxadiazole (Δ2-1,3,4-oxadiazoline; 5), 2,5-dihydro-1,3,4-oxadiazole (Δ3-1,3,4-oxadiazoline; 6) and 2,3,4,5-tetrahydro-1,3,4-oxadiazole (1,3,4-oxadiazolidine; 7).

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