Qhov sib txawv tseem ceeb ntawm pyrrole furan thiab thiophene yog pyrrole muaj ib pawg -NH hauv tsib lub nplhaib carbon thiab furan muaj cov pa oxygen atom hauv tsib lub nplhaib carbon whereas thiophene muaj sulfur atom hauv tsib -membered carbon nplhaib.
YPyrrole furan thiab thiophene yog cov organic tebchaw. Cov no yog tsib-ntiv nplhaib cov qauv uas ib qho carbon atom hloov nrog ib pab pawg sib txawv xws li pawg amine, oxygen atom lossis sulfur atom.
Pyrrole yog dab tsi?
Pyrrole yog tsib lub nplhaib nrog cov tshuaj formula C4H4NH. Nws yog heterocyclic compound nyob rau hauv uas ib tug nitrogen atom pab tsim lub nplhaib qauv, nrog rau plaub lwm carbon atoms. Peb tuaj yeem soj ntsuam pyrrole ua cov kua tsis muaj xim thiab tsis muaj xim ntawm chav tsev kub. Txawm li cas los xij, thaum raug huab cua ib txwm muaj, cov kua tau yooj yim darkens. Yog li ntawd, peb yuav tsum tau ntxuav nws ua ntej siv. Kev ua kom huv tuaj yeem ua tiav ntawm distillation tam sim ua ntej siv. Tsis tas li ntawd, cov kua no muaj cov ntxhiab tsw qab.
Daim duab 01: Tus Qauv ntawm Pyrrole
Tsis zoo li qee lwm tsib-tus tswv cuab heterocyclic rings xws li furan thiab thiophene, pyrrole muaj dipole uas qhov zoo ntawm lub nplhaib yog nyob rau ntawm heteroatom (-NH pawg bears tus nqi zoo). Pyrrole yog ib qho tsis muaj zog ua ke.
Ntxiv mus, qhov sib xyaw no tshwm sim hauv cov xwm txheej raws li cov khoom siv. Piv txwv li, vitamin B12, bile pigments xws li bilirubin, porphyrins, thiab lwm yam yog pyrrole derivatives. Txawm li cas los xij, qhov sib xyaw no yog tshuaj lom me ntsis. Hauv kev lag luam nplai, peb tuaj yeem tsim cov pyrrole los ntawm kev kho furan nrog ammonia. Tab sis, qhov tshuaj tiv thaiv no yuav tsum muaj cov khoom siv hluav taws xob zoo ib yam.
Furan yog dab tsi?
Furan yog tsib-tus tswv cuab lub nplhaib uas muaj cov pa oxygen atom ua ib feem ntawm lub nplhaib. Qhov ntawd txhais tau hais tias, ib qho oxygen atom, nrog rau plaub carbon atoms, ua rau tsib lub nplhaib ntawm furan. Nws yog lub npe hu ua lub nplhaib uas muaj ntxhiab heterocyclic. Nyob rau hauv chav tsev kub, cov compound no tawm raws li ib tug tsis muaj kob thiab volatile kua heev. Tsis tas li ntawd, cov kua no yog flammable thiab. lub boiling point ntawm furan yog heev ze rau chav tsev kub. Tsis tas li ntawd, nws muaj zog, ethereal-zoo li ntxhiab tsw. Thaum xav txog cov tshuaj toxicity, furan yog tshuaj lom heev thiab tuaj yeem ua carcinogenic rau tib neeg.
Daim duab 02: Tus qauv ntawm Furan
Ntxiv mus, qhov aromaticity ntawm furan yog vim qhov delocalization ntawm ib leeg electron khub ntawm cov pa atom rau hauv lub nplhaib. Tsis tas li ntawd, qhov sib xyaw no yog qhov muaj txiaj ntsig ntau dua li benzene hauv cov tshuaj tiv thaiv electrophilic. Nws yog vim yog tus cwj pwm pub dawb ntawm electron ntawm oxygen atom.
Nyob rau hauv kev lag luam nplai, peb tuaj yeem tsim furan ntawm decarbonylation ntawm furfural nyob rau hauv muaj palladium catalyst. Lossis, peb tuaj yeem siv lwm txoj hauv kev uas oxidation ntawm 1, 3-butadiene ua tiav nyob rau hauv lub xub ntiag ntawm tooj liab catalysts.
Thiophene yog dab tsi?
Thiophene yog tsib-tus tswv cuab lub nplhaib uas muaj leej faj atom thiab plaub carbon atoms hauv lub nplhaib. Yog li ntawd, nws yog ib tug muaj ntxhiab, heterocyclic nplhaib. Cov tshuaj formula ntawm tus qauv yog C4H4S. Nws yog cov kua uas tsis muaj xim uas muaj ntxhiab tsw zoo li benzene. Muaj ntau lwm yam zoo sib xws ntawm thiophene thiab benzene xws li reactivity. Peb tuaj yeem paub qhov txawv ntawm thiophene los ntawm benzene nyob ntawm qhov ua haujlwm siab ntawm thiophene rau sulfonation.
Daim duab 03: Tus qauv ntawm Thiophene
Thaum xav txog kev tsim cov thiophene, kev tsim khoom thoob ntiaj teb suav nrog cov pa roj carbon disulfide thiab butanol. Tsis tas li ntawd, qhov tshuaj tiv thaiv no yuav tsum muaj cov pa oxygen catalyst thiab kub siab.
Qhov txawv ntawm Pyrrole Furan thiab Thiophene yog dab tsi?
Pyrrole, furan, thiab thiophene yog cov organic tebchaw. Cov no yog tsib-ntiv nplhaib cov qauv uas ib qho carbon atom hloov nrog ib pab pawg sib txawv xws li pawg amine, oxygen atom lossis sulfur atom. Yog li, qhov sib txawv tseem ceeb ntawm pyrrole furan thiab thiophene yog pyrrole muaj ib pawg -NH nyob rau hauv tsib lub nplhaib carbon thiab furan muaj cov pa oxygen atom hauv tsib lub nplhaib carbon, whereas thiophene muaj sulfur atom nyob rau hauv tsib-membered. carbon nplhaib.
Hauv qab infographic qhia txog qhov sib txawv ntawm pyrrole furan thiab thiophene.
Summary – Pyrrole vs Furan vs Thiophene
Pyrrole, furan thiab thiophene yog cov organic tebchaw. Cov no yog tsib-ntiv nplhaib cov qauv uas ib qho carbon atom hloov nrog ib pab pawg sib txawv xws li pawg amine, oxygen atom lossis sulfur atom. Yog li ntawd, qhov sib txawv tseem ceeb ntawm pyrrole, furan thiab thiophene yog pyrrole muaj ib pawg -NH nyob rau hauv tsib lub nplhaib carbon thiab furan muaj oxygen atom nyob rau hauv tsib lub nplhaib carbon, whereas thiophene muaj sulfur atom hauv tsib- koom nrog carbon nplhaib.
