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According to the IUPAC definition of a hemiacetal, the R 1 and R 2 groups may or may not be hydrogen. In a hemiketal, both of these R-groups must not be hydrogen. Thus, hemiketals are regarded as a subclass of hemiacetals. [1] The prefix hemi, meaning half, refers to the one alcohol added to the carbonyl group.
Hemithioacetal functional group. In organic chemistry, hemithioacetals (or thiohemiacetals) are organosulfur compounds with the general formula R−CH(−OH)−SR’.They are the sulfur analogues of the acetals, R−CH(−OH)−OR’, with an oxygen atom replaced by sulfur (as implied by the thio-prefix).
Generic structure of acetals. In organic chemistry, an acetal is a functional group with the connectivity R 2 C(OR') 2. Here, the R groups can be organic fragments (a carbon atom, with arbitrary other atoms attached to that) or hydrogen, while the R' groups must be organic fragments not hydrogen. The two R' groups can be equivalent to each ...
C 8 H 18 O 2: hexanal dimethyl acetal: 1599-47-9 C 8 H 18 O 2 S: diisobutyl sulfone: 10495-45-1 C 8 H 18 O 2 Si: allyldiethoxymethylsilane: 18388-45-9 C 8 H 18 O 2 Sn: triethyl tin acetate: 1907-13-7 C 8 H 18 O 3: ethoxyacetaldehyde diethylacetal: 4819-77-6 C 8 H 18 S: diisobutyl sulfide: 592-65-4 C 8 H 19 Al: diisobutylaluminum hydride: 1191 ...
In organic chemistry, an acetyl group is a functional group denoted by the chemical formula −COCH 3 and the structure −C(=O)−CH 3.It is sometimes represented by the symbol Ac [5] [6] (not to be confused with the element actinium).
An electron transfer coupled with cleavage of the peroxo species generates a hemi-acetal radical. The terminal C-C bond cleaves homolytically to form the alkyl radical and release formate. The alkyl radical is quenched by final electron transfer. Two electron transfers restore the reduced state of di-iron and release a molecule of water.
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In coordination chemistry and catalysis hemilability (hemi - half, lability - a susceptibility to change) refers to a property of many polydentate ligands which contain at least two electronically different coordinating groups, such as hard and soft donors.