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{{chembox {{chembox

| verifiedrevid = 402386394
| Watchedfields = changed
| Name = Mesityl oxide
| verifiedrevid = 426873209
| ImageFile = Mesityl oxide.png
| ImageName = Mesityl oxide | Name = Mesityl oxide
| ImageFile_Ref = {{chemboximage|correct|??}}
| ImageFile1 = Mesityl-oxide-3D-balls.png
| ImageFile2 = Mesityl-oxide-3D-vdW.png | ImageFile = Mesityl oxide.png
| ImageName = Mesityl oxide
| IUPACName = 4-methylpent-3-en-2-one
| ImageFile1 = Mesityl-oxide-3D-balls.png
| OtherNames = Mesityl oxide<br />Isobutenyl methyl ketone<br />Methyl isobutenyl ketone<br />Isopropylidene acetone'''
| ImageFile2 = Mesityl-oxide-3D-vdW.png
| Section1 = {{Chembox Identifiers
| PIN = 4-Methylpent-3-en-2-one
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| OtherNames = Mesityl oxide<br />Isobutenyl methyl ketone<br />Methyl isobutenyl ketone<br />Isopropylidene acetone
|Section1={{Chembox Identifiers
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 8526 | ChemSpiderID = 8526
| StdInChI_Ref = {{stdinchicite|correct|chemspider}} | StdInChI_Ref = {{stdinchicite|correct|chemspider}}
Line 17: Line 20:
| CASNo_Ref = {{cascite|correct|CAS}} | CASNo_Ref = {{cascite|correct|CAS}}
| CASNo = 141-79-7 | CASNo = 141-79-7
| PubChem = 8858
| SMILES = O=C(\C=C(/C)C)C
| EINECS = 205-502-5
| InChI = 1/C6H10O/c1-5(2)4-6(3)7/h4H,1-3H3
| RTECS = SB4200000 | ChEBI = 89993
| ChEMBL = 3185916
| DTXSID = DTXSID1029170
| UNNumber = 1229
| UNII = 77LAC84669
| SMILES = O=C(\C=C(/C)C)C
| InChI = 1/C6H10O/c1-5(2)4-6(3)7/h4H,1-3H3
| RTECS = SB4200000
}} }}
| Section2 = {{Chembox Properties |Section2={{Chembox Properties
| C=6|H=10|O=1 | C=6 | H=10 | O=1
| Density = 0.858 g/cm³ | Density = 0.858 g/cm<sup>3</sup>
| Appearance = Straw-yellow liquid | Appearance = Oily, colorless to light-yellow liquid<ref name=PGCH/>
| Odor = peppermint- or honey-like<ref name=PGCH/>
| Solubility = Good
| Solubility = 3% (20°C)<ref name=PGCH/>
| Solvent = other solvents
| SolubleOther = Soluble in most organic solvents | Solvent = other solvents
| SolubleOther = Soluble in most organic solvents
| MeltingPtC = -53 | MeltingPtC = −53
| BoilingPtC = 129.5 | BoilingPtC = 129.5
| Viscosity = | Viscosity =
| RefractIndex = 1.442 | RefractIndex = 1.442
| VaporPressure = 9 mmHg (20°C)<ref name=PGCH/>
}} }}
| Section3 = {{Chembox Structure |Section3={{Chembox Structure
| Dipole = | Dipole =
}} }}
| Section7 = {{Chembox Hazards |Section7={{Chembox Hazards
| ExternalMSDS = | ExternalSDS =
| MainHazards = flammable | MainHazards = flammable
| FlashPt = {{convert|87|F|C}} | FlashPtF = 87
| FlashPt_ref =<ref name=PGCH/>
| RPhrases = {{R10}} {{R20/21/22}}
| SPhrases = {{S25}} | GHSPictograms = {{GHS02}}{{GHS07}}
| GHSSignalWord = Warning
| HPhrases = {{H-phrases|226|302|312|332}}
| PPhrases = {{P-phrases|210|233|240|241|242|243|261|264|270|271|280|301+312|302+352|303+361+353|304+312|304+340|312|322|330|363|370+378|403+235|501}}
| IDLH = 1400 ppm<ref name=PGCH>{{PGCH|0385}}</ref>
| LC50 = 1000 mg/m<sup>3</sup> (rat, 4 hr)<br/>9000 mg/m<sup>3</sup> (rat, 4 hr)<br/>10,000 mg/m<sup>3</sup> (mouse, 2 hr)<br/>2000 mg/m<sup>3</sup> (guinea pig, 7 hr)<ref name=IDLH>{{IDLH|141797|Mesityl oxide}}</ref>
| LD50 = 1120 mg/kg (rat, oral)<br/>1000 mg/kg (rabbit, oral)<br/>710 mg/kg (mouse, oral)<ref name=IDLH/>
| REL = TWA 10 ppm (40 mg/m<sup>3</sup>)<ref name=PGCH/>
| PEL = TWA 25 ppm (100 mg/m<sup>3</sup>)<ref name=PGCH/>
| ExploLimits = 1.4–7.2%<ref name=PGCH/>
}} }}
| Section8 = {{Chembox Related |Section8={{Chembox Related
| OtherCpds = ]<br />],<br />] | OtherCompounds = ]<br />],<br />]
}} }}
}} }}


'''Mesityl oxide''' is a ] with the formula CH<sub>3</sub>C(O)CH=C(CH<sub>3</sub>)<sub>2</sub>. This compound is a colorless, volatile ] with a strong ] odor.<ref>'']'', 11th Edition, '''5811'''</ref> '''Mesityl oxide''' is a ] with the formula CH<sub>3</sub>C(O)CH=C(CH<sub>3</sub>)<sub>2</sub>. This compound is a colorless, volatile ] with a honey-like odor.<ref>'']'', 14th Edition</ref>


==Synthesis== ==Synthesis==
It is prepared by the ] of ] to give ], which readily dehydrates to give this compound.<ref>{{OrgSynth | prep=cv1p0345 | title = Mesityl oxide | collvol = 1 | collvolpages = 345 | year = 1941 | author= ] and Neal Tuttle}}</ref> It is prepared by the ] of ] to give ], which readily dehydrates to give this compound.<ref>{{OrgSynth | last1= Conant|first1=J. B.|last2=Tuttle|first2=N. | doi= 10.15227/orgsyn.001.0053| title = Mesityl Oxide | volume= 1 | page = 53 | year = 1921}}</ref><ref name=Ull>{{cite book|doi=10.1002/14356007.a01_079|chapter=Acetone|title=Ullmann's Encyclopedia of Industrial Chemistry|year=2000|last1=Sifniades|first1=Stylianos|last2=Levy|first2=Alan B.|isbn=3527306730}}</ref>


:] :]


] may be formed under the same conditions of mesityl oxide production, by a ]. The yields of mesityl oxide and isophorone may vary according to reaction conditions during synthesis: ] and ] may be formed under the same conditions. Isophorone originates via a ]:


:] :]

] is formed by continued aldol condensation:

:]


==Uses== ==Uses==
Mesityl oxide is used as a solvent and in the production of ] by ]: Mesityl oxide is used as a solvent and in the production of ] by ]:<ref name=Ull/>
:] :]
Further hydrogenation gives ] (methyl isobutyl carbinol).

] is another established use of mesityl oxide.


==References== ==References==
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==External links== ==External links==
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