1,2,5-オキサジアゾール

説明1,2,5-Oxadiazole is a five-membered, heteroaromatic, planar heterocycle comprised of one oxygen atom with two vicinal nitrogen atoms (N-O-N) and two carbon atoms at the 3- and 4-positions of the ring. It is a π-excessive heterocycle also referred to by its trivial name furazan and corresponding 2-N-oxide as furoxan. The ionization energy of oxadiazole is 11.79 eV and the dipole moment is 3.38 D greater than isoxazole. The π electron density of the nitrogen atom is greater than the oxygen and carbon atoms as depicted in the following scheme.