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Iodomethane, also called methyl iodide, and commonly abbreviated "MeI", is the chemical compound with the formula CH 3 I. It is a dense , colorless, volatile liquid. In terms of chemical structure, it is related to methane by replacement of one hydrogen atom by an atom of iodine .
Diiodomethane or methylene iodide, commonly abbreviated "MI", is an organoiodine compound.Diiodomethane is a very dense colorless liquid; however, it decomposes upon exposure to light liberating iodine, which colours samples brownish.
It is iodide salt of a common sulfoxonium ions. This compound, a colorless solid, is commercially available. It may be prepared by the alkylation of dimethyl sulfoxide with iodomethane: [1] (CH 3) 2 SO + CH 3 I → (CH 3) 3 SO + I −. The trimethylsulfoxonium ion features a tetrahedral sulfur center. The ion has idealized C 3v symmetry.
Iodoform stored in an ampoule. Iodoform (also known as triiodomethane) is the organoiodine compound with the chemical formula C H I 3.It is a pale yellow, crystalline, volatile substance, with a penetrating and distinctive odor (in older chemistry texts, the smell is sometimes referred to as that of hospitals, where the compound is still commonly used) and, analogous to chloroform, sweetish taste.
The monohalomethanes are organic compounds in which a hydrogen atom in methane is replaced by a halogen.They belong to the haloalkanes or to the subgroup of halomethanes.. The four common [a] members are fluoromethane, chloromethane, bromomethane and iodomethane.
DMA was first reported in 1850 by the German chemist A. W. Hofmann, who prepared it by heating aniline and iodomethane: [3] [4] C 6 H 5 NH 2 + 2 CH 3 I → C 6 H 5 N(CH 3) 2 + 2 HI. DMA is produced industrially by alkylation of aniline with methanol in the presence of an acid catalyst: [5] C 6 H 5 NH 2 + 2 CH 3 OH → C 6 H 5 N(CH 3) 2 + 2 H 2 O
Trifluoroiodomethane contains carbon, fluorine, and iodine atoms. Although iodine is several hundred times more efficient at destroying stratospheric ozone than chlorine, experiments have shown that because the weak C-I bond breaks easily under the influence of water (owing to the electron-attracting fluorine atoms), trifluoroiodomethane has an ozone depleting potential less than one ...
Illustrative is the conversion of methanol to iodomethane: [15] PI 3 + 3 CH 3 OH → 3 CH 3 I + "H 3 PO 3 " For bulky alcohol substrates, the methiodide of triphenylphosphite has been used. [16] [CH 3 (C 6 H 5 O) 3 P] + I − + ROH → RI + CH 3 (C 6 H 5 O) 2 PO + C 6 H 5 OH. Aromatic iodides may be prepared via a diazonium salt by treatment ...