2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
The Hückel Hückel Hauv xyoo 1931, German chemist thiab physicist Erich Hückel tau thov txoj cai los txiav txim siab seb lub nplhaib lub nplhaib yuav muaj cov khoom muaj ntxhiab. Txoj cai no hais tias yog ib lub voj voog, cov qauv qauv muaj 4n + 2π electrons, nws yog aromatic. Txoj cai no yuav raug hu ua Hückel Txoj Cai. https://chem.libretexts.org › Aromaticity › Huckel's_Rule
Hückel Txoj Cai - Chemistry LibreTexts
tus lej rau pyridine thiab pyrimidine yog rau. Rings tsis tas yuav tsum muaj 6-tus tswv cuab thiaj li muaj rau π electrons. … Hauv pyrrole, tus khub ib leeg tuaj yeem xav tias yog nyob ntawm 2pz orbital, thiab yog li ob qho tib si ntawm cov hluav taws xob no ua rau muaj lub suab nrov π..
YPuas yog pyrimidines aromatic?
Pyrimidine yog ib qho aromatic heterocyclic organic compound zoo ib yam li pyridine.
Vim li cas pyridine muaj ntxhiab?
Pyridine yog ib qho tshuaj tsw qab uas muaj cov amine. Cov tshuaj tsw qab yog suav tias yog qhov ruaj khov heev thiab lawv tsuas tuaj yeem dhau mus cov tshuaj tiv thaiv yog tias cov khoom kawg khaws cov aromaticity ntawm lub nplhaib. Lub aromatic compound pyridine muaj peb resonance qauv. Yog li, pyridine yog ib qho tshuaj tsw qab.
Dab tsi ua rau purines muaj ntxhiab?
Purine yog ib qho heterocyclic aromatic organic compound uas muaj ob lub nplhaib (pyrimidine thiab imidazole) fused ua ke. Nws yog dej-soluble. Purine kuj muab nws lub npe rau cov chav kawm dav ntawm cov molecules,purines, uas suav nrog hloov purines thiab lawv tautomers.
YPuas yog pyridine aromatic lossis tsis muaj ntxhiab?
Pyridine muaj qhov sib txuas ntawm rau π electrons uas yog delocalized hla lub nplhaib. Cov molecule yog planar thiab, yog li, ua raws li Hückel cov qauv rau aromatic systems. Nyob rau hauv sib piv rau benzene, lub electron ceev tsis sib npaug zos rau ntawm lub nplhaib, qhia txog qhov tsis zoo inductive nyhuv ntawm nitrogen atom.
Pom zoo:
Vim li cas kuv thiaj hnov tus ntxhiab tsw txawv?
Ib qho olfactory hallucination (phantosmia) ua rau koj pom tsw ntxhiab uas tsis muaj nyob hauv koj ib puag ncig. Cov ntxhiab tsw pom hauv phantosmia txawv ntawm ib tus neeg mus rau ib tus neeg thiab tej zaum yuav qias lossis qab ntxiag. Lawv tuaj yeem tshwm sim hauv ib lossis ob lub qhov ntswg.
Vim li cas cyclodecapentaene tsis muaj ntxhiab?
[10] Annulene tseem hu ua cyclodecapentaene. Txij li thaum nws tau conjugated 10-π electrons tab sis tseem nws yog tsis muaj ntxhiab vim yog kev sib xyaw ntawm steric strain thiab angular strain. YPuas Cyclodecapentaene aromatic?
Vim li cas kuv thiaj ntxhov siab vim tsis muaj dab tsi?
Kev ntxhov siab tuaj yeem tshwm sim los ntawm ntau yam: kev ntxhov siab, noob caj noob ces, hlwb chemistry, xwm txheej raug mob, lossis ib puag ncig. Cov tsos mob tuaj yeem txo nrog tshuaj tiv thaiv kev ntxhov siab. Tab sis txawm tias muaj tshuaj kho mob, tib neeg kuj tseem muaj qee qhov kev ntxhov siab lossis txawm tias muaj kev ntxhov siab.
Thaum lub raj mis ntawm cov tshuaj tsw qab qhib cov ntxhiab tsw ntxhiab?
Thaum ib lub raj mis qhib, cov ntxhiab tsw ntxhiab sib tov nrog cua thiab maj mam ntws mus thoob plaws hauv chav tsev. Qhov twg tsis yog rau txoj kev no? Cov ntxhiab tsw molecules sib xyaw nrog huab cua los ntawm diffusion. Txij li cov pa roj yog qhov zoo tagnrho, tsis muaj qhov sib xyaw ua ke ntawm lawv.
Vim li cas kuv lub plab tsis muaj ntxhiab?
Zoo kawg nkaus rau poop kom muaj ntxhiab tsw zoo. Cov ntxhiab tsw los ntawm cov kab mob hauv cov hnyuv uas pab zom cov zaub mov digested. Poop tuaj yeem hnov tsw txawv vim qhov hloov pauv hauv koj cov zaub mov. Puas muaj ntxhiab tsw ntxhiab?
