Khoom
18-crown-6x; CAS No.: 17455-13-9
Txhais lus hais tias: 18-cathether-6; 18-crown-6; Ether-6; Ether-6; NSC159836; 1,4,13,16-hexaoxacycTadecane;
Kev Lag Luam Tshuaj ntawm 18-Crown-6
Winds Ntag / Xim: Cov khoom daj me ntsis
Pro vapor siab: 4.09e-06mmhg ntawm 25 ° C
● Melting point: 42-45 ºC (lit.)
● Cov ntsiab lus tsis zoo: 1.404
● Bowing taw tes: 395.8 ºC ntawm 760 MmHG
Flash taw tes: 163.8 ºC
● Psa:55.38000
Wensity: 0.995 g / cm3
● LogP: 0.09960
● Cia Temp. 1store ntawm 0-5 ° C
● Rhiab .:hygroscopic
● Solubility.:Chloroform (me ntsis), methanol (me ntsis)
● Dej Solubility.:Soluble
● XlogP3: -0.7
It Hydrogen BRonor pub nyiaj: 0
Hydrogen BRRong Txais Txais Suav: 6
Resetable Kev Muab Kev Rotatable Caud suav (0
● Muaj tseeb pes tsawg tus: 264.15728848
● Hnov Cov Atom Nruab Nrab: 18
Inclexity: 108
Cov Ntaub Ntawv Safty
● POTOSSGRAM (S):
Xn,
Xi
● Cov cai phom sij: xn, xi
● Cov nqe lus: 22-36 / 37 / 38-36-20 / 22-20 / 21/22
● Cov nqe lus kev nyab xeeb: 26-36-39
Zoo siv
Tshuaj lom neeg:Lwm cov chav kawm -> Lwm cov ocegic tebchaw
Canonical luag nyav:C1cococcoccoccoccocco1
Siv:Ib theem muaj txiaj ntsig hloov catalyst. 18-Crown-6 yog siv theem hloov pauv hloov pauv catalyst thiab raws li tus neeg sawv cev sib xyaw nrog ntau lub cation me me. Nws yog koom nrog hauv synthesis ntawm cov chaw ua haujlwm ntawm chaw ua haujlwm, chaw ua haujlwm ntawm cov poov xab mediat los ntawm poov tshuaj fluoride-alumina thiab 18-yas-6. Nws pab txhawb solubility ntawm poov tshuaj permanganate nyob rau hauv benzene, uas yog siv rau oxidizing cov organic teb. Nws yog siv los ua kom nrawm dua ntau yam kev cuam tshuam nrog rau kev txhim kho lub zog ntawm nucleophiles xws li potassium acetate. Nws tau siv nyob rau hauv lub alkylation cov tshuaj nyob rau hauv lub xub ntiag ntawm potassium carbonate, n-alklination ntawm glutarimide thiab succinimide nrog dimethylcarcarbonate. Cov complex tsim los ntawm nws cov tshuaj tiv thaiv nrog cov poov tshuaj cyasium cyanide ntawm aldehydes ntawm aldehydes ntawm aldehydes ntawm aldehydes ntawm aldehydes ntawm aldehydes thiab quinines nrog chimethylsilyl cypanide (tmscn). 18-Crown-6 may be used to catalyze the N-alkylation of heterocyclic compounds and allylation of functionalized aldehydes.
Cov lus qhia ntxaws ntxaws
18-crown-6yog lub cyclic ether compound nrog tshuaj mis nyuj c12h24o6. Nws yog lub npe "18-crown-6" vim tias nws muaj ib lub nplhaib ntawm 6 atxen atoms, thiab muaj 18 carbon powers hauv tag nrho. Nws yog ib qho tsis muaj kob, crystalline khoom uas yog soluble hauv cov kuab tshuaj organic tab sis kuj tsis muaj insoluble hauv dej.
Lub npe "crown" yog muab tau los ntawm cov qauv sib xyaw ua ke rau lub crown vim yog rau rau oxygen atoms teem nyob rau hauv cov qauv puag ncig. Cov qauv qauv no muaj 18-crown-6 nws cov khoom tshwj xeeb thiab ua rau nws tau siv dav hauv ntau yam kev siv.
Ib qho ntawm cov yam ntxwv tseem ceeb ntawm 18-crown-6 yog nws lub peev xwm sib zog nrog hlau ions. Cov pa Axygen atoms hauv cov nplhaib plhaub tuaj yeem koom tes nrog cov potassium, sodium, lossis calcium, los ua kev sib cog vaj tsev ruaj khov. Cov cuab yeej no ua rau 18-crown-6 ib dav siv sib xyaw ua ke hauv kev ua haujlwm ntawm kev ua kom cov kws ua haujlwm ua haujlwm.
Daim ntawv thov
Cov complexation ntawm cov hlau ions los ntawm 18-crown-6 tuaj yeem muaj ob peb daim ntawv thov:
Theem Hloov catalyst:Nyiam benzyltrimammonium chloride, 18-crown-6 kuj tuaj yeem ua raws li theem hloov catalyst. Nws pab rau kev hloov pauv hom, xws li cov hlau ions, ntu imprisrible, ua rau muaj kev nyuaj siab uas yuav tsis nyuaj lossis tsis yooj yim sua. Lub crown ishine tau encapsulate hlau cations, tso cai rau lawv kom dhau los ntawm cov kev ntxhua khaub ncaws lossis hloov ntawm cov kuab tshuaj sib txawv.
Ion Extraction thiab Cais:18-Crown-6 feem ntau siv hauv cov kuab tshuaj extraction extraction extraction rau xaiv extract thiab cais cov hlau ions los ntawm cov mixtures. Nws lub peev xwm los khi nrog qee cov khoom siv hlau tso cai rau kev rho tawm thiab ua kom huv ntawm cov e sib xyaw.
Ion lees thiab paub txog:Cov complexation ntawm cov hlau ions los ntawm 18-crown-6 tuaj yeem siv tau rau hauv kev tsim qauv tshuaj lom neeg thiab ion-xaiv hluav taws xob. Los ntawm kev sib xyaw 18-crown-6 mus rau sensor systems, nws muaj peev xwm xaiv tau thiab ntsuas cov hlau piv raws li lawv lub ntsej muag rau lub kaus mom.
Cov Khoom Siv Tshuaj:Lub peev xwm ntawm 18-crown-6 los ua cov complexes nrog hlau ions tuaj yeem siv hauv cov khoom siv tshuaj. Los ntawm encapsulating hlau ions nyob rau hauv lub crown wbe tsos, nws muaj peev xwm tiv thaiv cov hlau ions thaum thauj khoom thiab tso lawv hauv ib txoj kev tswj hwm ntawm lub vev xaib.
Zuag qhia tag nrho, 18-crown-6 yog ib qho kev pom zoo uas pom cov ntawv thov hauv Paus Hloov Cataly, hlau ion extraction, ion extraction, thiab xa tshuaj. Nws cov qauv ether ether cov qauv thiab cov khoom sib luag ua rau nws muaj txiaj ntsig zoo hauv ntau qhov kev tshawb fawb.
