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Lewis dot structure of a Hydroxide ion compared to a hydroxyl radical. In chemistry, a radical, also known as a free radical, is an atom, molecule, or ion that has at least one unpaired valence electron. [1] [2] With some exceptions, these unpaired electrons make radicals highly chemically reactive. Many radicals spontaneously dimerize. Most ...
{{Obituary|reason=A note about what the issue is.|{{subst:DATE}}}} – basic usage at top of article – include a note (only visible in the source at present) if the reason for using this tag isn't immediately apparent and/or isn't already under discussion on the talk page.
The hydroxyl radical • OH combines with H 2 S to form HS • and water. [21] Other reactions investigated by Tiee (1981) are HS • + ethylene, HS • + O 2 → HO • + SO, and reactions with itself HS • + HS • → H 2 S 2 or H 2 and S. [22] The disulfide can further react with HS • to make the disulfide radical HS–S • and H 2 S. [19]
In order to study gas phase interstellar chemistry, it is convenient to distinguish two types of interstellar clouds: diffuse clouds, with T=30-100 K, and n=10–1000 cm −3, and dense clouds with T=10-30K and density n= 10 4-10 3 cm −3. Ion chemical routes in both dense and diffuse clouds have been established for some works (Hartquist 1990).
Printable version; In other projects ... Pages in category "Free radicals" ... This list may not reflect recent changes. Free radical; Radical (chemistry) *
A molecular formula enumerates the number of atoms to reflect those in the molecule, so that the molecular formula for glucose is C 6 H 12 O 6 rather than the glucose empirical formula, which is CH 2 O. Except for the very simple substances, molecular chemical formulas generally lack needed structural information, and might even be ambiguous in ...
Most chemical reactions take more than one elementary step to complete, and a reactive intermediate is a high-energy, hence unstable, product that exists only in one of the intermediate steps. The series of steps together make a reaction mechanism .
Chemical structures and reaction schemes should conform to the following: Images should be drawn with a molecule editor, never freehand; ACS settings should be used for both structures and reaction schemes. These settings are normally available as templates in chemical drawing programs. Use sans-serif fonts like Arial.