Chemically synthesized borneol muaj plaub stereoisomers, (+)-isoborneol, (−)-isoborneol, (−)-borneol, thiab (+)-borneol.
Koj ua li cas txiav txim siab tus naj npawb ntawm cov neeg mob hnyav?
Qhov siab tshaj plaws ntawm cov stereomers ua tau rau ib qho kev sib xyaw yog sib npaug rau 2n qhov twg n yog tus naj npawb ntawm asymmetrical carbons (chiral centers) hauv ib lub molecule. Txhawm rau nrhiav tus naj npawb ntawm diastereomers, koj yuav tau kos cov stereomers sib txawv hauv Fischer qhov projections.
Puas yog isoborneol thiab borneol diastereomers?
YBorneol thiab isoborneol yog
diastereomers. Pib los ntawm borneol, muab ib tug ntau-kauj ruam synthesis uas yuav tsim isoborneol.
Muaj pes tsawg tus neeg mob ribose muaj?
Diasteomers yog cov sib xyaws uas muaj oblossis ntau lub chaw chiral thiab tsis yog daim iav duab ntawm ib leeg. Piv txwv li, aldopentoses txhua tus muaj peb lub chaw chiral. Yog li, D-ribose yog diastereomer ntawm D-arabinose, D-xylose, thiab D-lyxose.
Muaj pes tsawg tus neeg mob ntshav qab zib?
2n−2=24−2=16 - 2=14 (14 diastereomers). Piv txwv li, D-glucose muaj 4 chiral carbons, yog li muaj 16 aldohexoses (8 D thiab 8 L). L-Glucose yog ib qho enantiomer ntawm D-glucose, thiab lwm yam 14 aldohexoses yog diastereomers ntawm lawv.
