(2-Bromophenyl)diphenylphosphine is an organophosphorus compound with the formula (C6H4Br)P(C6H5)2. It is a white crystalline solid that is soluble in nonpolar organic solvents. The compound is used as a precursor to the 2-lithiated derivative of triphenylphosphine,[1] which in turn is a precursor to other phosphine ligands.
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Preferred IUPAC name
(2-Bromophenyl)di(phenyl)phosphane | |
Other names
(o-Bromophenyl)diphenylphosphine
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Properties | |
C18H14BrP | |
Molar mass | 341.188 g·mol−1 |
Appearance | White solid |
Melting point | 115 °C (239 °F; 388 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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The compound has been prepared by several methods.[1] An efficient route is the coupling reaction of diphenylphosphine and 2-bromoiodobenzene, which is catalyzed by palladium complexes (Ph = C6H5):[2]
The compound is isomorphous with (2-tolyl)diphenylphosphine.[3]
Lithiation with butyl lithium gives o-lithiated triphenylphosphine. The bromide also forms a Grignard reagent. These metallated phosphines are versatile reagents.[4]