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Revision as of 22:52, 6 August 2011 editCheMoBot (talk | contribs)Bots141,565 edits Updating {{chembox}} (no changed fields - added verified revid - updated 'DrugBank_Ref', 'UNII_Ref', 'ChEBI_Ref', 'KEGG_Ref') per Chem/Drugbox validation (report [[Wikipedia_talk:WikiProject_Chem← Previous edit Latest revision as of 20:33, 23 February 2024 edit undoTGSpecialist1 (talk | contribs)58 editsm See also 
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{{Distinguish|Bromotoluene}}
{{chembox {{chembox
| Verifiedfields = changed
| verifiedrevid = 443418196
| Watchedfields = changed
| Reference=<ref>'']'', 11th Edition, '''1142'''</ref>
| verifiedrevid = 443419516
| Name = Benzyl bromide
| Reference = <ref>{{cite book|title=Merck Index |edition=11th |page=1142|title-link=Merck Index }}</ref>
| ImageFileL1 = Benzyl-bromide-skeletal.svg
| Name = Benzyl bromide
| ImageSizeL1 = 120px
| ImageNameL1 = Skeletal structure of the benzyl bromide molecule | ImageFileL1 = Benzyl bromide.svg
| ImageNameL1 = Skeletal structure of the benzyl bromide molecule
| ImageFileR1 = Benzyl-bromide-3D-vdW.png | ImageFileR1 = Benzyl-bromide-from-clathrate-xtal-3D-sf.png
| ImageNameR1 = 3D structure of the benzyl bromide molecule
| ImageSizeR1 = 100px
| PIN = (Bromomethyl)benzene <!-- Nomenclature of Organic Chemistry – IUPAC Recommendations and Preferred Names 2013 (Blue Book) -->
| ImageNameR1 = 3D structure of the benzyl bromide molecule
| SystematicName =
| IUPACName = Bromomethylbenzene
| OtherNames = α-Bromotoluene<br />Benzyl bromide
| IUPACName =
| Section1 = {{Chembox Identifiers | Section1 = {{Chembox Identifiers
| IUPHAR_ligand = 6294
| InChI = 1/C7H7Br/c8-6-7-4-2-1-3-5-7/h1-5H,6H2 | InChI = 1/C7H7Br/c8-6-7-4-2-1-3-5-7/h1-5H,6H2
| InChIKey = AGEZXYOZHKGVCM-UHFFFAOYAM | InChIKey = AGEZXYOZHKGVCM-UHFFFAOYAM
| SMILES1 = c1ccc(cc1)CBr | SMILES1 = c1ccc(cc1)CBr
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| CASNo_Ref = {{cascite|correct|CAS}} | CASNo_Ref = {{cascite|correct|CAS}}
| CASNo = 100-39-0 | CASNo = 100-39-0
| UNII_Ref = {{fdacite|changed|FDA}}
| PubChem = 7498
| UNII = XR75BS721D
| ChEBI_Ref = {{ebicite|correct|EBI}}
| PubChem = 7498
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 59858 | ChEBI = 59858
| SMILES = BrCc1ccccc1 | SMILES = BrCc1ccccc1
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}} }}
| Section2 = {{Chembox Properties | Section2 = {{Chembox Properties
| C=7 | H=7 | Br=1
| Formula = C<sub>7</sub>H<sub>7</sub>Br
| Appearance = Colorless liquid
| MolarMass = 171.04 g/mol
| Odor = Sharp and pungent
| Density = 1.438 g/cm³ at 20&nbsp;°C | Density = 1.438 g/cm<sup>3</sup>
| MeltingPtC = -3.9 | MeltingPtC = -3.9
| BoilingPt = 198-199&nbsp;°C
| BoilingPtC = 201
| SolubleOther = organic solvents
| RefractIndex = 1.5752
| LogP = 2.92<ref name="chemsrc">{{Cite web|url=https://www.chemsrc.com/en/cas/100-39-0_401904.html|title=Benzyl bromide_msds}}</ref>
}}
| Section3 =
| Section4 =
| Section5 =
| Section6 =
| Section7 = {{Chembox Hazards
| FlashPtC = 70
| GHSPictograms = {{GHS07}}
}} }}
}} }}


'''Benzyl bromide''' is an ] with the formula {{chem2|C6H5CH2Br}}. The molecule consists of a ] ring substituted with a bromomethyl group. It is a colorless liquid with lachrymatory properties. The compound is a reagent for introducing ]s.<ref name=eEROS>{{cite journal|title=Benzyl Bromide|author=William E. Bauta|journal=Encyclopedia of Reagents for Organic Synthesis|year=2001|doi=10.1002/047084289X.rb047|isbn=0-471-93623-5}}</ref><ref>{{cite web|title=Benzyl bromide|url=http://www.sigmaaldrich.com/catalog/product/aldrich/b17905?lang=en&region=RU|website=]|publisher=sigmaaldrich.com|access-date=8 June 2017}}</ref>
'''Benzyl bromide''', or α-bromotoluene, is an ] consisting of a ] ring substituted with a bromomethyl group. It can be prepared by the bromination of ] at room temperature in air, using ] as a heterogeneous catalyst. It is a colorless liquid that is decomposed slowly in water.


== Synthesis and structure==
Benzyl bromide is used in ] for the introduction of the benzyl ] for ]s and ]s.
Benzyl bromide can be synthesized by the bromination of ] under conditions suitable for a ]:
:]


The structure has been examined by electron diffraction.<ref>{{cite journal|last1=Vilkov|first1=L. V.|last2=Sadova|first2=N. I.|title=Electron diffraction study on the molecular structure of benzyl chloride and benzyl bromide in the vapour phase|journal=]|date=March 1976|volume=31|issue=1|pages=131–142|doi=10.1016/0022-2860(76)80124-X|bibcode=1976JMoSt..31..131S }}</ref>
Benzyl bromide is a strong ] and is also intensely irritating to skin and mucous membranes. Because of these properties, it has been used as a war gas.


== Synthesis == ==Applications==
Benzyl bromide is used in ] for the introduction of the benzyl groups when the less expensive ] is insufficiently reactive.<ref>{{cite journal|title=Synthesis and Diastereoselective Alkylation of Pseudoephenedrine Amides |author=Andrew G. Myers |author2=Bryant H. Yang|journal=Org. Synth.|year=2000|volume=77|page=22|doi=10.15227/orgsyn.077.0022}}</ref>
Benzyl bromide can be synthesized by the bromination of ] under conditions suitable for a ]:
<ref>{{cite journal|title=1-Benzylindole |author=Harry Heaney |author2=Steven V. Ley|journal=Org. Synth.|year=1974|volume=54|page=58|doi=10.15227/orgsyn.054.0058}}</ref> Benzylations are often achieved in the presence of catalytic amounts of ], which generates the more reactive benzyl iodide in situ.<ref name=eEROS/> In some cases, benzyl serves as ] for ]s and ]s.<ref>{{cite web|title=Benzyl bromide|url=http://www.chemicalbook.com/ChemicalProductProperty_EN_CB6761035.htm|publisher=chemicalbook.com|access-date=8 June 2017}}</ref>


==Safety==
]
Benzyl bromide is a strong ] and is also intensely irritating to skin and mucous membranes. Because of these properties, it has been used in ], both in combat and in training due to its irritating yet non-lethal nature.


] may also be used in place of elemental bromine.
== See also == == See also ==
* ] * ]
* ]
* ]
* ]


== References == == References ==
{{reflist}} {{reflist}}

{{Chemical agents}}


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