Video: Lub molecule puas tuaj yeem ua chiral yam tsis muaj Stereocenter?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Chiral Cov tshuaj Tsis muajStereocenters [edit]
Nws tseem ua tau rau ib molecule ua chiral tsis muaj muaj qhov taw tes tiag tiag kev hlub tshua ( stereocenters ). Feem ntau ntsib cov piv txwv suav nrog 1, 1'-bi-2-naphthol (BINOL) thiab 1, 3-dichloro-allene uas muaj axial kev hlub tshua , thiab (E)-cyclooctene uas muaj planar kev hlub tshua.
Kuj tseem paub yog, koj ua li cas txiav txim siab yog tias lub molecule yog chiral?
Nrhiav cov pa roj carbon nrog plaub pawg sib txawv txuas nrog txheeb xyuas peev xwm chiral chaw. Kos koj molecule nrog wedges thiab dashes thiab ces kos ib daim iav duab ntawm lub molecule . Yog tias molecule nyob rau hauv daim iav duab yog tib yam molecule , nws yog achiral. Yog lawv txawv molecules , ces yog chiral.
Qhov thib ob, qhov txawv ntawm Stereocenter thiab chiral center yog dab tsi? Thaum ib qho atom txuas nrog peb txawv atoms los yog pawg ntawm atoms, uas yog hu ua a stereocenter . Stereoisomers yog qhov tshwm sim ntawm stereocenters . Chiralcenters tshwm sim thaum cov pa roj carbon atom txuas rau plaub txawv atoms lossis pawg ntawm atoms. Chiral molecules tsis zoo tib yam tab sis yog daim iav duab ntawm ib leeg.
Ua li no, puas yog txhua qhov chaw chiral Stereocenters?
A stereocenter yog ib qho atom nyob rau hauv ib lub molecule uas sib pauv ob pawg tsim ib qho txawv stereoisomer. Tag nrho cov chaw chiral yog stereocenters , txawm li cas los xij, tsis yog tag nrho cov stereocenters yog chiral chaw raws li peb yuav ntsib cov piv txwv ntawm qhov no hauv tshooj tom ntej. Tsis txhob tawm hws qhov nthuav dav ntawm lub sijhawm no.
Puas yog cov chaw chiral yuav tsum yog cov pa roj carbon?
Chiral molecules feem ntau muaj tsawg kawg yog ib qho carbon atom nrog plaub yam tsis muaj kev hloov pauv. Xws li ib carbon atom npe a chiral chaw (los yog qee zaum a stereogenic chaw ), siv cov organic-hais lus. Tsis muaj willcarbons ntawm ob lossis triple daim ntawv cog lus chiral chaw vim lawv ua tau 't muaj bonds rau plaub pawg sib txawv.
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