1-Bromo-4-iodobenzene
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| Names | |
|---|---|
| Preferred IUPAC name 1-Bromo-4-iodobenzene | |
| Other names p-Bromoiodobenzene | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.008.785 |
| EC Number |
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PubChem CID | |
| UNII | |
CompTox Dashboard (EPA) | |
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| Properties | |
| C6H4BrI | |
| Molar mass | 282.90 g/mol |
| Appearance | colorless solid |
| Melting point | 91 °C (196 °F; 364 K)[1] |
| Related compounds | |
Related compounds | 1,4-Dibromobenzene |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
1-Bromo-4-iodobenzene is a mixed aryl halide (aryl bromide and aryl iodide) with the formula BrC6H4I.[2]
Preparation
[edit]In one laboratory route to 1-bromo-4-iodobenzene, 4-bromoaniline is treated with concentrated sulfuric acid and sodium nitrite to form the diazonium salt, which is then treated with potassium iodide to form 1-bromo-4-iodobenzene.[3]
Reactions
[edit]Since aryl iodides are more reactive than aryl bromides in the Sonogashira coupling,[4] the iodine end of 1-bromo-4-iodobenzene can be selectively coupled to a terminal acetylene while leaving the bromine end unreacted, by running the reaction at room temperature. For example, two equivalents of 1-bromo-4-iodobenzene can couple to trimethylsilylacetylene in a room temperature symmetrical Sonogashira coupling (with TMSA being deprotected to acetylene in-situ) to form bis(4-bromophenyl)acetylene.[5]
See also
[edit]References
[edit]- ^ "1-Bromo-4-iodobenzene". ChemSpider. Retrieved 21 October 2023.
- ^ PubChem. "1-Bromo-4-iodobenzene". pubchem.ncbi.nlm.nih.gov. Retrieved 2023-10-22.
- ^ Banerjee, M.; Shukla, R.; Rathore, R. (15 January 2009). "Synthesis, Optical, and Electronic Properties of Soluble Poly-p-phenylene Oligomers as Models for Molecular Wires". Journal of the American Chemical Society. 131 (5): 1780–1786. doi:10.1021/ja805102d. PMID 19146375.
- ^ Chinchilla, R.; Nájera, C. (2007), "The Sonogashira Reaction: A Booming Methodology in Synthetic Organic Chemistry", Chem. Rev., 107 (3): 874–922, doi:10.1021/cr050992x, PMID 17305399
- ^ Mio, Matthew J.; Kopel, Lucas C.; Braun, Julia B.; Gadzikwa, Tendai L.; Hull, Kami L.; Brisbois, Ronald G.; Markworth, Christopher J.; Grieco, Paul A. (2002). "One-Pot Synthesis of Symmetrical and Unsymmetrical Bisarylethynes by a Modification of the Sonogashira Coupling Reaction". Organic Letters. 4 (19): 3199–3202. doi:10.1021/ol026266n. PMID 12227748.