Koj paub li cas cov pa roj carbon ntau dua hloov?
Koj paub li cas cov pa roj carbon ntau dua hloov?

Video: Koj paub li cas cov pa roj carbon ntau dua hloov?

Video: Koj paub li cas cov pa roj carbon ntau dua hloov?
Video: zoo nkauj cuag kuv tus no.paj huab vaj.zoo xyooj.nkauj tawm tshiab.10/19/2022-23 2024, Kaum ib hlis
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lub " feem ntau hloov ” carbon yog cov carbon ntawm alkene uas txuas nrog rau feem ntau carbons (los yog "tsawg dua ntawm hydrogens", yog tias koj nyiam). qhov “tsawg hloov ” carbon yog cov carbon ntawm alkene uas txuas nrog tsawg tshaj plaws carbons (los yog " ntau dua tus naj npawb ntawm hydrogens ")

Tom qab ntawd, ib tus kuj yuav nug, nws txhais li cas thaum cov pa roj carbon ntau hloov?

Cov pa roj carbon ntau dua yog ib daim ntawv ntau dua tsis muaj. ntawm daim ntawv cog lus nrog lwm tus carbon atoms. Tsawg dua hloov carbon muaj tsawg carbon atoms tsim daim ntawv cog lus rau nws. Piv txwv li, peb degree carbon atom yog ntau hloov carbon atom tshaj ob degree ib.

Yog vim li cas qhov no yuav yog ib tug ruaj khov Carbocation tus nqi yog nyob rau ntawm ib tug ntau hloov carbon atom tus nqi yog nyob rau hauv ib tug tsawg hloov carbon atom? Qhov sib ntxiv ntawm hydrogen ion rau ib qho carbon atom nyob rau hauv lub alkene tsim ib tug zoo nqi ntawm lwm yam carbon , ua a carbocation nruab nrab. Cov ntau hloov tus carbocation , cov ruaj khov dua Nws yog, vim induction thiab hyperconjugation.

Kuj Paub, koj yuav txheeb xyuas cov pa roj carbon monoxide thib ob thiab qib thib ob li cas?

Cov pa roj carbon ntau , yog carbons txuas rau ib leeg carbon . ( Hydrogens - Txawm hais tias feem ntau 3 tus lej hauv qhov no - tsis quav ntsej hauv cov lus no, raws li peb yuav pom). Secondary carbons yog txuas rau ob lwm carbons . Tertiary carbons txuas rau peb lwm yam carbons.

Hoffman txoj cai yog dab tsi?

Hofmann txoj cai yog empirical txoj cai siv los kwv yees regioselectivity ntawm 1, 2-kev tshem tawm cov tshuaj tiv thaiv tshwm sim ntawm E1cB mechanism. Nws hais tias, nyob rau hauv ib tug regioselective E1cB cov tshuaj tiv thaiv, cov khoom loj yog cov tsis ruaj khov alkene, piv txwv li, cov alkene nrog qhov tsawg heev hloov ob daim ntawv cog lus.

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