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The reaction of O 2 BF 4 with xenon at 173 K (−100 °C) produces a white solid believed to be F–Xe–BF 2, containing an unusual xenon-boron bond: [14] 2 O 2 BF 4 + 2 Xe → 2 O 2 + F 2 + 2 FXeBF 2. The dioxygenyl salts O 2 BF 4 and O 2 AsF 6 react with carbon monoxide to give oxalyl fluoride, C 2 O 2 F 2, in high yield. [15]
2 O 3, in bauxite and corundum), iron (iron(III) oxide Fe 2 O 3, in hematite and rust), and calcium carbonate (in limestone). The rest of the Earth's crust is also made of oxygen compounds, in particular various complex silicates (in silicate minerals). The Earth's mantle, of much larger mass than the crust, is largely composed of silicates of ...
O 2 or dioxygen, the common allotrope of the chemical element oxygen; O 2−, the ion oxide; O − 2, the ion superoxide; O + 2, the ion dioxygenyl; O 2+, doubly ionized oxygen; O(2), the 2-dimensional orthogonal group in group theory; O2, an EEG electrode site according to the 10–20 system; SGI O2, a Unix workstation computer
2 O 2) is formed when metallic sodium is burned in oxygen. Each oxygen atom in its peroxide ion may have a full octet of 4 pairs of electrons. [6] Superoxides are a class of compounds that are very similar to peroxides, but with just one unpaired electron for each pair of oxygen atoms (O − 2). [6]
The doublet state requires an odd number of electrons, and so cannot occur in dioxygen without gaining or losing electrons, such as in the superoxide ion (O − 2) or the dioxygenyl ion (O + 2). The ground state of O 2 has a bond length of 121 pm and a bond energy of 498 kJ/mol. [3] It is a colourless gas with a boiling point of −183 °C (90 ...
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O 2-bound form of hemocyanin, the O 2 carrier for certain molluscs. These binding modes include μ 2-η 2,η 2-, μ 2-η 1,η 1-, and μ 2-η 1,η 2-. Depending on the degree of electron-transfer from the dimetal unit, these O 2 ligands can again be described as peroxo or superoxo. Hemocyanin is an O 2-carrier that
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