<unk> , commonly called methyl iodide and commonly abbreviated "MeI", is the chemical compound with the formula CH3I.  This dense volatile liquid is related to methane by replacement of one hydrogen atom by an atom of iodine and its dipole moment is 1.59 D. Refractive index is 1.5304 (20 °C, D), 1.5293 (21 °C, D). It is miscible with common organic solvents. It is colourless, although upon exposure to light, samples develop a purplish tinge caused by the presence of I2.  Storage over copper metal absorbs the iodine.  Methyl iodide is widely used in organic synthesis to deliver a methyl group, via the transformation called methylation.  It is naturally emitted by rice plantations in small amounts.
Iodomethane
Dichloromethane
Diazomethane
Bromomethane
Chloromethane
Chloroethane
Chlorobutanol
Bromoethane