In the Simmons-Smith reaction, these compounds react with iodomethyl zinc iodide to form cyclopropanes, and the same product can be formed by reacting them with a carbene.  
In the Simmons-Smith reaction, these compounds react with iodomethyl zinc iodide to form cyclopropanes, and the same product can be formed by reacting them with a carbene.  Treatment with mercury acetate in aqueous solvent followed by reduction leads to alcohol formation, as does reacting them with borane followed by treatment with hydrogen peroxide, the latter of which leads to the anti-Markovnikov product.  Osmium tetraoxide adds to them to form diols, and they can be cleaved by ozone into two carbonyl containing compounds.  Commonly formed from the dehydrohalogenation of an alkyl halide or dehydration of an alcohol, FTP name these organic compounds characterized by the presence of a carbon-carbon double bond.
In the Simmons-Smith reaction, these compounds react with iodomethyl zinc iodide to form cyclopropanes, and the same product can be formed by reacting them with a carbene.  
alkenes [accept olefin]