Cov piv txwv stereoisomers yog dab tsi?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Geometric isomers (tseem hu ua cis / trans isomers) yog hom ntawm stereoisomer uas tshwm sim los ntawm ob daim ntawv cog lus los yog ib tug ringstructure. Qhov yooj yim tshaj plaws piv txwv ntawm geometric isomers arecis-2-butene thiab trans-2-butene. Nyob rau hauv txhua lub molecule, ob lub bondis ntawm carbons 2 thiab 3.

Hais txog qhov no, hom stereoisomers yog dab tsi?

Ob yam tseem ceeb ntawm stereoisomerism yog:

• DiaStereomerism (xws li 'cis-trans isomerism')
• Optical Isomerism (tseem hu ua 'enantiomerism' thiab 'chirality')

Cov piv txwv ntawm kev cai lij choj isomers yog dab tsi? eg. 1: Butane thiab isobutane muaj tib lub qauv molecular, C₄H₁₀, tab sis txawv structuralformulas. eg. 2: Ethyl cawv thiab dimethyl ether muaj cov mis mos tib yam, C₂H₆O, tab sis txawv qauv qauv. Yog li ntawd, ethyl cawv thiab dimethyl etherare Constitutional isomers.

Hais txog qhov no, koj txhais li cas los ntawm stereoisomers?

Txhais ntawm Stereoisomers . Ob tug molecules yog piav raws li stereoisomers yog lawv yog ua los ntawm tib lub atoms txuas nrog tib lub sijhawm, tab sis theatoms yog positioned txawv nyob rau hauv qhov chaw. Optical isomers yog molecules uas yog iav dluab ntawm ib leeg.

Yuav ua li cas koj xam stereoisomers?

Yuav ua li cas muab cov qauv no rau cov naj npawb ntawm cov stereoisomers ntawm ib qho chaw nrog lub dav hlau ua tau ntawm symmetry?

1. Yog tias 'n' yog txawm (ntawm no yog tus naj npawb ntawm chiral centres): Numberof enantiomers = 2n−1. Tus naj npawb ntawm mesocompound = 2n/2−1.
2. Yog tias 'n' yog khib: Number ofenantiomers = 2n−1−2(n−1)/2. Number of mesocompound = 2(n−1)/2.