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- One of the following molecules (a)–(d) is d-erythrose 4-phosphate, an intermediate in the Calvin photosynthetic cycle by which plants incorporate CO2 into carbohydrates. If d-erythrose 4-phosphate has R stereochemistry at both chirality centers, which of the structures is it? Which of the remaining three structures is the enantiomer of d-erythrose 4-phosphate, and which are diastereomers?The chiral catalyst (R)-BINAP-Ru is used to hydrogenate alkenes to give alkanes . The products are produced with high enantiomeric excess. An example is the formation of (S)-naproxen, a pain reliever. Q.How can one enantiomer of naproxen be formed in such high yield?Hi, I need help with 7c. For 7a I got 3 asymmetric centers and for 7b I got 8 possible stereoisomers.
- Do Sn2 reactions always happen with inversion of stereochemistry, and does the stereocenter always change from R to S or S to R?Identify the stereochemistry of the indicated carbon, write R or S 6. 7. 8. 9. 10.How many stereoisomers are possible for 10,12-hexadecadien-1-ol? CH3(CH2)2CH=CHCH=CH(CH2)8CH2OH 10,12-Hexadecadien-1-ol
- up an example (not appearing in this ChemActivity) of a pair of molecules that are a)constitutional isomers, b) conformers. c) configurational stereoisomers.Two conformations of cis-l, 3-dimethylcyclobutane are shown. What is the difference between them, and which do you think is likely to be more stable?Rank the following groups in order of decreasing priority. −CH=CH2, −CH3, −C≡CH, −H
