2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ib hom hetero atom suav nrog nitrogen, oxygen, thiab sulfur. Pyridine (C 5 H 5 N), pyrrole (C 4 H5N), furan (C4H 4O) , thiab thiophene (C 4H 4S) yog cov piv txwv ntawm cov tshuaj heteroaromatic. Vim tias cov tebchaw no yog cov tshuaj tsw qab monocyclic, lawv yuav tsum ua raws Hückel Txoj Cai.
Dab tsi yog qhov sib xyaw heteroaromatic?
A heteroaromatic compound yog ib qho chaw uas nws cov molecule muaj ib lossis ntau lub heterocycles uas muaj ntxhiab.
Qhov twg hauv qab no yog cov tshuaj heterocyclic?
Cov heterocycles ntau tshaj plaws yog cov uas muaj tsib- lossis rau-tus tswv cuab rings thiab muaj heteroatoms ntawm nitrogen (N), oxygen (O), lossis sulfur (S). Qhov zoo tshaj plaws paub ntawm cov yooj yim heterocyclic tebchaw yog pyridine, pyrrole, furan, thiab thiophene.
Dab tsi yog cov tshuaj tsw qab nrog cov piv txwv?
Cov tshuaj tsw qab yog cov tshuaj sib xyaw uas muaj cov txheej txheem sib xyaw ua ke nrog cov huab cua delocalized pi-electron nyob rau hauv qhov chaw ntawm ib tus neeg sib hloov ob thiab ib daim ntawv cog lus. Lawv kuj hu ua aromatics los yog arenes. Cov piv txwv zoo tshaj yog toluene thiab benzene.
Qhov twg tsis yog heteroaromatic?
electrons. Tetrahydrofuran yog cov tshuaj heterocyclic. Tab sis nws tsis yog ib qho aromatic compound. Txawm hais tias nws muaj ib khub ntawm electrons, cov noelectrons tsis delocalized vim tsis muaj kev sib txuas lus.
Pom zoo:
Qhov twg hauv qab no yog qhov zoo tshaj plaws txhais tau tias yog dramatis personae?
Definition of dramatis personae 1: cov cim lossis cov neeg ua yeeb yam hauv zaj yeeb yaj kiab. 2 lus hauv kev tsim kho: ib daim ntawv teev cov cim lossis cov neeg ua yeeb yam hauv zaj yeeb yaj kiab. 3: cov neeg uas pom qhov tseem ceeb hauv qee yam (xws li kev tshwm sim) Qhov twg hauv qab no yog lub ntsiab lus zoo tshaj plaws ntawm kev tsis sib haum?
Qhov twg hauv qab no yog (yog) cov chaw nyob hauv dej?
Lawv suav nrog dej, pas dej, kwj, pas dej, swamps, wetlands, bogs thiab lagoons. Cov chaw nyob hauv hiav txwv yog cov chaw nyob hauv dej uas muaj ntsev ntau tshaj li ib feem pua. Lawv suav nrog dej hiav txwv, hiav txwv thiab coral reefs. Qee qhov chaw nyob muaj qhov dej ntsev thiab dej tshiab sib xyaw ua ke.
Qhov twg hauv qab no yog qhov ua rau qaug dab peg hauv cov neeg laus?
Qhov feem ntau ua rau qaug dab peg yog mob vwm. Tab sis tsis yog txhua tus neeg uas muaj qaug dab peg muaj mob vwm. Qee zaum qaug dab peg yuav tshwm sim los yog tshwm sim los ntawm: kub taub hau, uas tuaj yeem cuam tshuam nrog kev kis kab mob xws li mob meningitis.
Qhov twg hauv qab no yog qhov piv txwv ntawm qhov tsis suav nrog cov lej tsis suav nrog?
Pi is a non-terminating, non-repeating decimal. π=3.141 592 653 589 793 238 462 643 383 279 … e is a non-terminating, non-repeating decimal. Ib qho piv txwv ntawm tus lej tsis suav nrog yog dab tsi? Piv txwv: 0.5, 2.456, 123.456, thiab lwm yam.
Qhov twg hauv qab no yog qhov tseeb tag nrho cov fungi yog filamentous?
Teb tiav: A) Fungi muaj cov qauv filamentous hu ua hyphae. Lub hyphae yog cov saw ntev ntawm cov hlwb koom nrog pib ua kom tiav los ntawm kev sib cais sib cais hu ua septa (septate) lossis tsis muaj septa (aseptate). Txawm li cas los xij, ob peb kab mob xws li Poov xab tsis ua hyphae thiab yog ib leeg-celled.
