B. A newly isolated natural product was shown to be optically active. If a solution of 2.0 g in 10 mL of ethanol in a 50 cm tube gives a rotation of +2.57°, what is the specific rotation of this natural product?
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- An attempt at synthesizing a certain optically-active compound resulted in a mixture of its enantiomers. The mixture had an observed specific rotation of +14.2°. If it is known that the specific rotation of the R enantiomer is -31.0°, determine the percentage of each isomer in the mixture. R enantiomer: % S enantiomer: %A 0.26 M solution of an enantiomerically pure chiral compound D has an observed rotation of +0.197° in a 1‑dm sample container. The molar mass of the compound is 132.3 g/mol. a. What is the specific rotation of D? b. What is the observed rotation if this solution is mixed with an equal volume of a solution that is 0.26 M in L, the enantiomer of D? c. What is the observed rotation if the solution of D is diluted with an equal volume of solvent?Glutamic acid is a naturally occurring amino acid and isthe precursor to the food additive MSG (monosodium glutamate)which can cause allergic reactions in some people. If naturally occurring L glutamic acid has a melting point of 205 C and an optical rotation of + 31.5, what is the melting point and optical rotation of its enantiomer?
- Glutamic acid is a naturally occurring amino acid and is the precursor to the food additive MSG (monosodium glutamate) which can cause allergic reactions in some people. If naturally occurring L glutamic acid has a melting point of 205 C and an optical rotation of + 31.5, what is the melting point and optical rotation of its enantiomer?Suppose a solution of a compound gave a rotation of +160o. How could this rotation be distinguihed from one of -200oand from one of +520o?The specific rotation, [a]p, for (-)-2-butanol is +14. What is the observed rotation for a solution of 3.3 g of (-)-2-butanol in 10 mL of water in a sample tube having a pathlength of 10 cm? degrees . The observed rotation of a solution of 0.75 g of a compound in 10 mL of water is -6.9 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound?
- The specific rotation, [a]p, for (-)-malic acid is -27. What is the observed rotation for a solution of 0.75 g of (-)-malic acid in 10 mL of water in a sample tube having a pathlength of 10 cm? degrees. The observed rotation of a solution of 1.4 g of a compound in 10 mL of water is +1.3 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound? 9 more group attempts remaining Submit Answer Retry Entire GroupHow can we decide whether an observed rotation of a solution of an optically active compound is +170° and not actually -190°?Use compounds D and E shown below to answer this question. What would be the observed rotation of a 4:1 mixture of D:E if pure compound E has a specific rotation of +12°? Show how you arrived at your answer. (Use the back if necessary) CI, Br Br .CI compound D compound E
- A solution prepared by mixing 10 mL of a 0.10 M solution of the R enantiomer of a compound and 30 mL of a 0.10 M solution of the S enantiomer was found to have an observed specific rotation of +4.8. What isthe specific rotation of each of the enantiomers? (Hint: mL * M = millimole, abbreviated as mmol)a）Name this molecule. Draw another stereoisomer, labelling each chiral atom with the proper descriptor (R or S). b) What is the stereochemical relationship between 2a and the one you drew? c) If the optical rotation of the S,S isomer is +15.1°, what is the optical rotation of the stereoisomer you drew? d) Can this molecule and the isomer you drew be separated by distillation? Explain why, or why not.The specific rotation of vitamin C ( using the D line of sodium, at 20°C) is +24. Predict what the observed rotation would be for a solution containing 0.100 g of vitamin C dissolved in 10.0 ml of ethanol and placed in a sample cell with a length of 1dm.
