1,2-Bis(dichlorophosphino)benzene is an

organophosphorus compound Organophosphorus compounds are organic compounds containing phosphorus. They are used primarily in pest control as an alternative to chlorinated hydrocarbons that persist in the environment. Some organophosphorus compounds are highly effective in ...

with the formula C₆H₄(PCl₂)₂. A viscous colorless liquid, it is a precursor to chelating

diphosphine Diphosphane, or diphosphine, is an inorganic compound with the chemical formula P2H4. This colourless liquid is one of several binary phosphorus hydrides. It is the impurity that typically causes samples of phosphine to ignite in air. Propert ...

s of the type C₆H₄(PR₂)₂. It is prepared from

1,2-dibromobenzene 1,2-Dibromobenzene is an organobromine compound with the formula C6H4Br2. It is one of three isomers, the others being 1,3- and 1,4-dibromobenzene. It is a colorless liquid, although impure samples appear yellowish. The compound is a precursor ...

by sequential

lithiation In organometallic chemistry, organolithium reagents are chemical compounds that contain carbon–lithium Lithium (from el, λίθος, lithos, lit=stone) is a chemical element with the symbol Li and atomic number 3. It is a soft, silv ...

followed by treatment with (Et₂N)₂PCl (Et =

ethyl Ethyl may refer to: Arts and entertainment * Cold Ethyl, a Swedish rock band *Ethyl Sinclair, a character in the ''Dinosaurs'' television show Science and technology * Ethyl group, an organic chemistry moiety * Ethyl alcohol (or ethanol) * E ...

), which affords C₆H₄ (NEt₂)₂sub>2. This species is finally cleaved with

hydrogen chloride The compound hydrogen chloride has the chemical formula and as such is a hydrogen halide. At room temperature, it is a colourless gas, which forms white fumes of hydrochloric acid upon contact with atmospheric water vapor. Hydrogen chloride ga ...

: :C₆H₄ (NEt₂)₂sub>2 + 8 HCl → C₆H₄(PCl₂)₂ + 4 Et₂NH₂Cl

Related compounds

1,2-Bis(dichlorophosphino)ethane 1,2-Bis(dichlorophosphino)ethane is an organophosphorus compound with the formula (CH2PCl2)2. A colorless liquid, it is a precursor to chelating diphosphines. Synthesis and reactions It is prepared by the reaction of ethylene, white phosphorus, a ...

References

{{DEFAULTSORT:Bis(dichlorophosphino)benzene, 1,2- Phosphines