2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Anisole yog tus qauv reagent ntawm ob qho tib si tswv yim thiab kev qhia txog tus nqi. Nws tuaj yeem npaj tau los ntawm Williamson ether synthesis; sodium phenoxide yog reacted nrog ib tug methyl halide los yield anisol.
Yuav ua li cas koj yuav npaj anisole los ntawm Williamson txoj kev?
Ua tiav cov kauj ruam los ntawm cov lus teb:
Anisole yog npaj los ntawm kev ua ntawm methyl iodide ntawm sodium phenoxide. Cov tshuaj tiv thaiv no hu ua Williamson's synthesis. Williamson's synthesis: Qhov no yog ib txoj hauv kev zoo tshaj plaws rau kev npaj ethers. Nws koom nrog kev kho mob ntawm alkyl halide nrog cov tshuaj sodium alkoxide uas tsim nyog.
Y Yuav siv cov anisole yog dab tsi?
Anisole yog cov khoom siv raw khoom pib los hloov tshuaj los ntawm Pharmaceuticals Industries (qib txuj ci). Nws cov tsos yog cov kua ntshiab. Anisole nthuav qhia ntau yam kev siv: solvent rau tshuaj lom neeg cov tshuaj tiv thaiv, synthesis intermediates thiab hnyav rau electronics.
Cov tshuaj tiv thaiv ntawm anisol yog dab tsi?
Cov phenol reacts nrog sodium hydroxide thiab muab phenoxide ion uas reacts nrog methyl muab anisol. Nov yog cov lus teb yog lawm.
Yuav ua li cas anisole npaj los ntawm Williamson txoj kev sib txuas muab qhov sib npaug?
Anisole lossis methoxy benzene yog cov organic compound nrog cov mis CH3OC6H5 .…
- Williamson's synthesis. C6H5−ONa+Br−CH3 →C6H5−OCH3+NaBr.
- 2. Los ntawm methylation ntawm sodium phenoxide nrog dimethylsulfate los yog methyl chloride. 2C6H5−ONa(CH3O)2SO2→−Na2SO42C6H5−OCH3.
- Siv diazomethane.
Pom zoo:
Lub sijhawm twg ntawm lub sijhawm cev xeeb tub yog progesterone siab tshaj?
Theem luteal: Lub sijhawm ntawm ovulation thiab ua ntej pib cev xeeb tub, thaum lub cev npaj rau kev xeeb tub. Progesterone raug tsim, ncov, thiab tom qab ntawd poob. Thaum nyob rau hauv lub uterine voj voog yog cov qib progesterone siab tshaj?
Puas muaj qhov sib txawv ntawm lub sijhawm thiab lub sijhawm?
Whilst thiab while yog ob lo lus uas muaj lub ntsiab lus zoo ib yam-feem ntau. Tab sis koj tsis tuaj yeem siv ib txwm siv thaum siv sijhawm. Feem ntau, Brits siv thaum thiab Asmeskas siv thaum. Qhov no yog qhov sib txawv tseem ceeb. Qhov txawv ntawm thaum twg thiab thaum twg?
Lub sijhawm kuv lub sijhawm dawb lossis thaum kuv lub sijhawm dawb?
yog li, qhov no txhais tau tias "thaum kuv lub sijhawm dawb" tsis siv ntauthiab koj muab "hauv kuv lub sijhawm dawb" ntau dua nyob rau qhov kawg ntawm kab lus. Piv txwv li: Kuv tau taug kev tus dev thaum kuv lub sijhawm dawb.
Lub sijhawm nyob qhov twg ntawm lub sijhawm teem sijhawm?
kab kab rov tav ntawm lub rooj ntu ntu yog hu ua ntu ntu. Lub sijhawm nyob rau ntawm lub sijhawm nyob qhov twg? Ib lub sijhawm yog kab kab rov tav ntawm lub rooj ntu ntu. Muaj xya lub sij hawm nyob rau hauv lub sij hawm ntawm lub sij hawm, nrog txhua tus pib ntawm sab laug.
Ntawm lub sijhawm lub sijhawm lub atomic loj?
Lub atomic mass ntawm ib lub caij yog qhov nruab nrab loj ntawm cov atoms ntawm ib lub ntsiab ntsuas hauv atomic mass unit(amu, tseem hu ua d altons, D). Lub atomic huab hwm coj yog qhov hnyav nruab nrab ntawm tag nrho cov isotopes ntawm lub caij ntawd, nyob rau hauv uas qhov loj ntawm txhua isotope yog sib npaug los ntawm kev nplua nuj ntawm cov isotope.
