Chemistry:Bromocyclohexane
| |
| Names | |
|---|---|
| Preferred IUPAC name
Bromocyclohexane | |
| Other names
Cyclohexyl bromide
| |
| Identifiers | |
3D model (JSmol)
|
|
| ChemSpider | |
PubChem CID
|
|
| UNII | |
| |
| |
| Properties | |
| C6H11Br | |
| Molar mass | 163.06 g/mol |
| Appearance | colorless liquid |
| Density | 1.324 g/cm3 |
| Melting point | −57 °C (−71 °F; 216 K) |
| Boiling point | 166 to 167 °C (331 to 333 °F; 439 to 440 K) |
| Hazards | |
| Flash point | 62.8 °C (145.0 °F; 335.9 K) |
| Related compounds | |
Related compounds
|
Chlorocyclohexane Fluorocyclohexane Iodocyclohexane |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
 verify (what is   ?)
| |
| Infobox references | |
Bromocyclohexane (also called cyclohexyl bromide, abbreviated CXB) is an organic compound with the chemical formula (CH
2)
5CHBr.
Uses and reactions
It is used to match the refractive index of PMMA for example in confocal microscopy of colloids. A mixture of cis-decalin and CXB can simultaneously match optical index and density of PMMA.[1] Due to the moderate dielectric constant of CXB (ε = 7.9 [2]), PMMA acquires charges that can be screened by the addition of salt (e.g. tetrabutyl ammonium bromide), leading to a very good approximation of colloidal hard sphere.[3] A drawback is that CXB is a good solvent for PMMA, causing it to swell over time, which may lead to a poor determination of particle radii and determination of solid volume fraction.[4]
It is a standard coupling partner of cross coupling reactions.[5] Similarly, cyclohexyl bromide is a standard alkylating agent.[6]
Synthesis
Bromocyclohexane can be prepared by the free radical bromination of cyclohexane.
Safety
Bromocyclohexane is an alkylating agent.
References
- ↑ Wiederseiner, Sébastien; Andreini, Nicolas; Epely-Chauvin, Gaël; Ancey, Christophe (2011). "Refractive-index and density matching in concentrated particle suspensions: A review". Experiments in Fluids 50 (5): 1183–1206. doi:10.1007/s00348-010-0996-8. Bibcode: 2011ExFl...50.1183W. https://infoscience.epfl.ch/record/162753/files/348_2010_Article_996.pdf.
- ↑ "Dielectric Constants of Various Materials". http://www.deltacnt.com/99-00032.htm.
- ↑ Royall, C. Patrick; Poon, Wilson C. K.; Weeks, Eric R. (2013). "In search of colloidal hard spheres". Soft Matter 9 (1): 17–27. doi:10.1039/c2sm26245b. Bibcode: 2013SMat....9...17R. https://www.research.ed.ac.uk/en/publications/0b44579c-35ad-42b2-9be0-1da11c19f3c3.
- ↑ Poon, Wilson C. K.; Weeks, Eric R.; Royall, C. Patrick (2012). "On measuring colloidal volume fractions". Soft Matter 8 (1): 21–30. doi:10.1039/c1sm06083j. Bibcode: 2012SMat....8...21P.
- ↑ Le, Chip; Liang, Yufan; Evans, Ryan W.; Li, Ximing; MacMillan, David W. C. (2017). "Selective sp3 C–H alkylation via polarity-match-based cross-coupling". Nature 547 (7661): 79–83. doi:10.1038/nature22813. PMID 28636596. Bibcode: 2017Natur.547...79L.
- ↑ Hancock, Evelyn M.; Cope, Arthur C. (1945). "A-Cyclohexylphenylacetonitrile". Organic Syntheses 25: 25. doi:10.15227/orgsyn.025.0025.
 |  |
