Homework Answers
a. All compounds are optically active since all compounds have non superimposable mirror images.
b. Two fractions can be obtained. This is because diastereomer and enantiomer has same boiling point, here A and C are enantiomer; B is the diastereomer of both A and C, so A, B and C have same boiling point. Therefor D comes as one fraction and A, B & C comes as another fraction.
c. Both fractions are optically active. Here in one fraction C alone is optically active. In other fraction Optical activity of A and C cancels each other since they are enantiomers but B shows optical activity.
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5.66 A mixture contains equal amounts of compounds A-D. a. Which compounds alone are optically active?...
7.66 A mixture contains equal amounts of compounds A-D. a. Which compounds alone are optically active?...
7.66 A mixture contains equal amounts of compounds A-D. a. Which compounds alone are optically active? b. If the mixture was subjected to fractional distillation, how many fractions would be obtained? c. How many of these fractions would be optically active?
66 A mixture contains equal amounts of compounds A-D. A B C D a. Which compounds...
66 A mixture contains equal amounts of compounds A-D. A B C D a. Which compounds alone are optically active? b. If the mixture was subjected to fractional distillation, how many fractions would be obtained? C. How many of these fractions would be optically active?
Problem 7. There are six possible dimethylcyclobutane structures. A) Draw three-dimensional line-angle structures for these six...
Problem 7. There are six possible dimethylcyclobutane structures. A) Draw three-dimensional line-angle structures for these six isomers. (3p) B) Which of the isomers are chiral? (2 p) C) If a mixture consisting of 1 mol of each of these isomers were subjected separation using boiling points (distillation), how many fractions would be obtained and which compounds would each fraction contain? (10) D) How many of these fractions would be optically active? (1p)
A mixture of equal amounts of two enantiomers ____. A) is optically inactive B) is called...
A mixture of equal amounts of two enantiomers ____. A) is optically inactive B) is called a racemic mixture C) implies that the enantiomers are meso forms D) both A and B E) none of the above Label each asymmetric carbon in the compound below as R or S.
19) Would a 50/50 mixture of the two compounds below be optically active? Briefly explain your...
19) Would a 50/50 mixture of the two compounds below be optically active? Briefly explain your answer CH3 H-Br Br CH3 OH
Someone please help me with this problem Enantiomers have very similar physical properties, while for diastereomers...
Someone please help me with this problem
Enantiomers have very similar physical properties,
while for diastereomers they can be very different. This fact is
important in the separation or resolution of enantiomers. In the
lecture, we looked at how chiral chromatography is used to separate
enantiomers: first, by reacting them with an optically pure chiral
reagent (i.e., pure R or S) to form a pair of diastereomers, then
separating them using chiral chromatography, and finally detaching
the chiral reagent to...
An optically active mixture has an ee value of 60% ee. What is percentage of the...
An optically active mixture has an ee value of 60% ee. What is percentage of the major enantiomerin this mixture?A. 75%B. 80%C. 60%D. 40%
7. (9 pts) (Are the following optically active or meso? meso HyCHC OH HO opticaly actve...
7. (9 pts) (Are the following optically active or meso? meso HyCHC OH HO opticaly actve active opti call active 8. (3 pts) How many stereoisomers are there of 2,3-dibromobutane? 4 sleeoisamvers (8 pts) Circle the letter of the statements that are true. a. Racemic mixtures are optically active Enantiomers have specific rotations that are equal, but have opposite signs 9. o adtc) Achiral molecules are optically inactive d Meso compounds contain equal amounts of enantiomers 4pts) Complete the Fischer...
Which of the following compounds can in principle be isolated in optically active form at room temperature?
Which of the following compounds can in principle be isolated in optically active form at room temperature?a. cis-1,4-dimethylcyclohexaneb.trans-1,3-dimethylcyclohexanec.1,1-dimethylcyclohexaned.cis-1-ethyl-3-methylcyclohexane
An aldopentose A, is oxidised to a diacid, B, which is optically active Compound A is...
An aldopentose A, is oxidised to a diacid, B, which is optically active Compound A is also degraded to an aldotetrose, C, which undergoes oxidation to an optically inactive diacid D. Given that A has the D configuration what are the structures of A through to D? Justify your answers.
7.66 A mixture contains equal amounts of compounds A-D. a. Which compounds alone are optically active? b. If the mixture was subjected to fractional distillation, how many fractions would be obtained? c. How many of these fractions would be optically active?
66 A mixture contains equal amounts of compounds A-D. A B C D a. Which compounds alone are optically active? b. If the mixture was subjected to fractional distillation, how many fractions would be obtained? C. How many of these fractions would be optically active?
Problem 7. There are six possible dimethylcyclobutane structures. A) Draw three-dimensional line-angle structures for these six isomers. (3p) B) Which of the isomers are chiral? (2 p) C) If a mixture consisting of 1 mol of each of these isomers were subjected separation using boiling points (distillation), how many fractions would be obtained and which compounds would each fraction contain? (10) D) How many of these fractions would be optically active? (1p)
A mixture of equal amounts of two enantiomers ____. A) is optically inactive B) is called a racemic mixture C) implies that the enantiomers are meso forms D) both A and B E) none of the above Label each asymmetric carbon in the compound below as R or S.
19) Would a 50/50 mixture of the two compounds below be optically active? Briefly explain your answer CH3 H-Br Br CH3 OH
Someone please help me with this problem
Enantiomers have very similar physical properties,
while for diastereomers they can be very different. This fact is
important in the separation or resolution of enantiomers. In the
lecture, we looked at how chiral chromatography is used to separate
enantiomers: first, by reacting them with an optically pure chiral
reagent (i.e., pure R or S) to form a pair of diastereomers, then
separating them using chiral chromatography, and finally detaching
the chiral reagent to...
7. (9 pts) (Are the following optically active or meso? meso HyCHC OH HO opticaly actve active opti call active 8. (3 pts) How many stereoisomers are there of 2,3-dibromobutane? 4 sleeoisamvers (8 pts) Circle the letter of the statements that are true. a. Racemic mixtures are optically active Enantiomers have specific rotations that are equal, but have opposite signs 9. o adtc) Achiral molecules are optically inactive d Meso compounds contain equal amounts of enantiomers 4pts) Complete the Fischer...
An aldopentose A, is oxidised to a diacid, B, which is optically active Compound A is also degraded to an aldotetrose, C, which undergoes oxidation to an optically inactive diacid D. Given that A has the D configuration what are the structures of A through to D? Justify your answers.
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