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|Section2= }} Aluminium(I) oxide is a compound of aluminium and oxygen with the chemical formula Al2O. It can be prepared by heating the stable oxide Al2O3 with elemental silicon at 1800 °C under vacuum. ==Formation and occurrence== Al2O commonly exists as a gas, since the solid state is not stable at room temperature and is only stable between 1050 and 1600 °C. Aluminium (I) Oxide is formed by heating Al and Al2O3 in vacuo while in the presence of SiO2 and C, and only by condensing the products.〔Hoch, Michael, Johnston, Herrick, L. “Formation, stability and crystal structure of the solid aluminum suboxides: Al2O and AlO.” Journal of the American Chemical Society. 76.9 (1954): 2260-2561.〕 Information is not commonly available on this compound due to instability, complex high-temperature spectra, difficult detection, and identification. In reduction, Al2O is a major component of vapors of Al2O3. There are also 12 valence electrons in Al2O.〔Cai, Mingfang, Carter, Christopher C., Miller, Terry A. “Fluorescence excitation and resolved emission spectra of supersonically cooled Al2O.” The Journal of Chemical Physics. 95.1 (1991): 73-79.〕 Al2O molecules can be detected by mass spectrometry, infrared emission, and ultraviolet absorption and emission in the gas phase. The molecule is linear at equilibrium in the ground state.〔Koput, Jacet, Gertych, Arthur. “Ab initio prediction of the potential energy surface and vibrational-rotational energy levels of dialuminum monoxide, Al2O.” Journal of Chemical Physics. 121.1 (2004): 130-135.〕 In term of valence bond theory, these molecules can be described as adopting sp2 orbital hybridisation, featuring one sigma and two pi bonds. The corresponding ground state for the valence electrons is 1σ2 1σ *2 2σ2 1π4 1π *2, where the 1σ and 1σ * orbitals cancel, and the 1π and 1π * partially cancel. The overall configuration yields a divalent triplet molecule, with one lone electron focused on the oxygen atom and the other focused equally between the aluminium atoms. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Aluminium(I) oxide」の詳細全文を読む スポンサード リンク
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