Qhov sib txawv tseem ceeb ntawm allene thiab cumulene yog tias allene muaj ob daim ntawv cog lus ob, hos cumulene muaj peb ob daim ntawv cog lus.
Ob leeg allene thiab cumulene yog cov organic tebchaw. Cov no yog cov alkenes muaj ob daim ntawv cog lus ntawm carbon atoms. Allene muaj peb carbon atoms, thiab muaj ob ob daim ntawv cog lus ntawm peb cov carbon atoms. Cumulene, ntawm qhov tod tes, muaj plaub carbon atoms thiab muaj peb ob daim ntawv cog lus ntawm lawv.
Allen yog dab tsi?
Allene yog cov organic compound uas muaj ob daim ntawv cog lus ntawm peb cov pa roj carbon atom. Hauv lwm lo lus, muaj peb cov pa roj carbon atoms rau ib qho allene molecule, thiab muaj C=C=C- chemical bond. Lub davhlau ya nyob twg carbon atoms txuas rau ob hydrogen atoms ib carbon atom. Cov qauv dav dav yog raws li hauv qab no:
Daim duab 01: Tus Qauv ntawm Allene
Lub hauv paus carbon atom hauv no allene molecule qhia sp hybridization thiab ob lub davhlau ya nyob twg carbon atoms muaj sp2 hybridization. Txij li thaum daim ntawv cog lus lub kaum sab xis ntawm C=C=C daim ntawv cog lus yog 180 degrees, cov molecule tshwm raws li ib tug linear molecule. Ob lub davhlau ya nyob twg cov pa roj carbon atom qhia cov duab geometry. Peb tuaj yeem soj ntsuam cov molecule no hauv cov qauv tetrahedral txuas ntxiv.
Allene tuaj yeem ua ke nrog cov txheej txheem tshwj xeeb. Niam txiv molecule ntawm allene yog propadiene, thiab nws muaj peev xwm tsim industrially ntawm ib tug loj scale raws li ib tug sib npaug zos sib tov nrog methylacetylne. Qhov sib tov no hu ua MAPP gas, uas yog muag. Muaj qee txoj hauv kev kuaj peb tuaj yeem siv los ua cov allene; los ntawm cov tshuaj tiv thaiv ntawm qee lub davhlau ya nyob twg alkynes nrog formaldehyde, tooj liab (I) bromide, thiab ntxiv puag, los ntawm dehydrohalogenation ntawm qee yam dihalides, thiab lwm yam.
Cumulene yog dab tsi?
Cumulene yog cov organic compound uas muaj peb ob daim ntawv cog lus ntawm plaub carbon atoms. Hauv lwm lo lus, qhov sib xyaw no muaj plaub cov pa roj carbon atom sib koom ua ke hauv cov qauv linear uas muaj ob daim ntawv cog lus nrog ib leeg, thiab ob lub davhlau ya nyob twg carbon atoms muaj ob lub hydrogen atoms sib koom nrog cov pa roj carbon atom. Cov qauv no yog hu ua cumulative double bonded structure. Tsis yog lub npe ntawm cov tebchaw no ua alkenes, peb categorize lawv li cumulenes. Tsis zoo li feem ntau ntawm cov alkanes thiab alkenes, cumulenes yog cov khoom nruj thiab sib piv nrog alkynes.
Daim duab 02: Cov qauv ntawm Cumulene
Txoj kev paub zoo rau kev sib txuas ntawm cumulene yog qhov txo qis ntawm cov geminal dihalovinylidene. Thawj qhia kev sib txuas ntawm cov cumulene yog nyob rau hauv 1921, lub synthesis ntawm ib tug butatriene.
Cov cumulene cov tebchaw yog nruj vim tias muaj ob lub hauv paus carbon atoms uas nqa ob daim ntawv cog lus. Cov pa roj carbon atoms muaj sp hybridization uas ua rau ob lub pi bonds ib qho rau txhua tus nyob sib ze carbon atom. Yog li ntawd, cumulene compounds muaj linear geometry. Yog tias tsis muaj qhov sib npaug ntawm cov pa roj carbon atoms es tsis yog hydrogen atoms, ces peb tuaj yeem soj ntsuam isomerism nyob ntawd.
Qhov txawv ntawm Allene thiab Cumulene yog dab tsi?
Allene thiab cumulene yog cov organic hydrocarbon tebchaw uas peb tuaj yeem faib ua alkenes. Qhov sib txawv tseem ceeb ntawm allene thiab cumulene yog tias allene muaj ob daim ntawv cog lus, thaum cumulene muaj peb ob daim ntawv cog lus. Txawm li cas los xij, ob qho tib si yog cov kab sib txuas vim tias muaj ob daim ntawv cog lus ntawm qhov nruab nrab ntawm cov molecules.
Cov lus hauv qab no teev ntau qhov sib txawv ntawm allene thiab cumulene.
Summary – Allene vs Cumulene
Allene thiab cumulene yog cov organic hydrocarbon tebchaw uas peb tuaj yeem faib ua alkenes. Qhov sib txawv tseem ceeb ntawm allene thiab cumulene yog tias allene muaj ob daim ntawv cog lus thib ob thaum cumulene muaj peb ob daim ntawv cog lus.
