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Both the negatively charged anion HO −, called hydroxide, and the neutral radical HO·, known as the hydroxyl radical, consist of an unbonded hydroxy group. According to IUPAC definitions, the term hydroxyl refers to the hydroxyl radical (·OH) only, while the functional group −OH is called a hydroxy group. [1]
The lifetime of • HO radicals in the Earth atmosphere is very short, therefore • HO concentrations in the air are very low and very sensitive techniques are required for its direct detection. [9] Global average hydroxyl radical concentrations have been measured indirectly by analyzing methyl chloroform (CH 3 CCl 3 ) present in the air.
The polymeric compounds M(OH) 2 and M(OH) 3 are in general prepared by increasing the pH of an aqueous solution of the corresponding metal cation until the hydroxide precipitates out of solution. On the converse, the hydroxides dissolve in acidic solution. Zinc hydroxide Zn(OH) 2 is amphoteric, forming the tetrahydroxidozincate ion Zn(OH) 2−
Holmium is a chemical element; it has symbol Ho and atomic number 67. It is a rare-earth element and the eleventh member of the lanthanide series . It is a relatively soft, silvery, fairly corrosion -resistant and malleable metal.
Typographical symbols and punctuation marks are marks and symbols used in typography with a variety of purposes such as to help with legibility and accessibility, or to identify special cases. This list gives those most commonly encountered with Latin script. For a far more comprehensive list of symbols and signs, see List of Unicode characters.
Chemical symbols are the abbreviations used in chemistry, mainly for chemical elements; but also for functional groups, chemical compounds, and other entities. Element symbols for chemical elements, also known as atomic symbols, normally consist of one or two letters from the Latin alphabet and are written with the first letter capitalised.
Holmium(III) hydroxide is an inorganic compound with the chemical formula Ho(OH) 3. Holmium(III) hydroxide Identifiers CAS Number. 12054-57-8 ...
Together with its conjugate base superoxide, hydroperoxyl is an important reactive oxygen species.Unlike • O − 2, which has reducing properties, HO • 2 can act as an oxidant in a number of biologically important reactions, such as the abstraction of hydrogen atoms from tocopherol and polyunstaturated fatty acids in the lipid bilayer.