If the experimental melting point for 2,3 dibromocinnamic acid is 200-202 deg C. The melting point...
Homework Answers
ERYTHRO is a having same groups on same side so lesser around two chiral centers, so they have higher dipole moment
Where as the threo has two same groups on opposite of fischer projection leading to lesser dipole moment.
The higher dipole moment means higher value of boiling point. So we can conclude that it should be erythro product.
Add Answer to:
If
the experimental melting point for 2,3 dibromocinnamic acid is
200-202 deg C. The melting point...
The product was 2,3-dibromo-3-phenylpropanoic acid, with a melting point of 198-200 °C . So a racemic...
The product was 2,3-dibromo-3-phenylpropanoic acid, with a
melting point of 198-200 °C . So a racemic mixture of (2R,3S) and
(2S,3R).
Based on your knowledge of the bromination of alkenes, did this alkene behave like other alkenes, or was the mechanism different than what you expected? (1 pt) ОН NHBrz acetic acid NHBr Br 0 OH Br 2,3-dibromo-3- phenylpropanoic acid pyridinium bromide trans cinnamic acid pyridinium bromide perbromide
Bromination of Trans-Cinnamic Acid Lab Question: The melting point of my product is 115-118C. The percent...
Bromination of Trans-Cinnamic Acid Lab Question: The melting point of my product is 115-118C. The percent yield was 19.2%. Is the product erythro or threo? From the melting point, I am guessing it is the threo. But wasn't the product supposed to be erythro? Can someone explain this result? And what is a possible reason why the yield is very low?
K2CO3 1.5 H20 Br он heat 2,3-dibromocinnamic acid trans-1-bromo-2-phenylethene Compound MW mp (C)bp (C) density (g/ml)...
K2CO3 1.5 H20 Br он heat 2,3-dibromocinnamic acid trans-1-bromo-2-phenylethene Compound MW mp (C)bp (C) density (g/ml) mol) 2,3-dibromocinnamic acid 307.97 93-95 (threo) n'a n a 202-204 (erythro)E K CO.1.5H:O1 methylene chloride 138.21 84.93 56.11 891 na n a n'a 39.6 n a n a 1.33 n a 3 MKOH 2. a. What is the by-product formed in this reaction (not shown in given reaction equation)? b. What is the purpose of adding 3 M KOH at the beginning of the...
Reduction of Benzil: Meso melting point = 137-139 Experimental melting point = 136.6-137.9 Can so...
Reduction of Benzil:
Meso melting point = 137-139
Experimental melting point = 136.6-137.9
Can someone please help with part b and c thanks!
b) Sketch the functional group region of the IR of the product and provide wavenumbers of relevant peaks. c) Based on your IR data, was your reaction successful? Explain, citing peaks to illustrate your point.
b) Sketch the functional group region of the IR of the product and provide wavenumbers of relevant peaks. c) Based on your...
Based on the melting point and specific rotation experimental data: a.draw the structure(s) of the product(s)...
Based on the melting point and specific rotation experimental
data:
a.draw the structure(s) of the product(s) of the trans-cinnamic
acid addition reaction with bromine.
b. State whether the addition of Br2followed asyn or
antiaddition or both. Give reasons.
c. Is this product chiral? If so, identify the chirality
centers.
d. Is the product of the trans-cinnamic acid addition reaction
with bromine optically active? Give reasons.
e. Is your answer to Question 2d what you expected? Give
reasons.
f. What is...
A solid unknown has a melting point range of around 115-117 deg C and has a...
A solid unknown has a melting point range of around 115-117 deg
C and has a IR spectrum shown below. What is the likely
structure/name of the compound?
3. Draw the triacylglyceride formed from glycerol and three molecules of oleic acid. 4. The melting...
3. Draw the triacylglyceride formed from glycerol and three molecules of oleic acid. 4. The melting point of stearic acid is 70°C, and the melting point of oleic acid is 4°C. Explain in detail why their melting points are so different. 5. Describe the primary, secondary and tertiary levels of structure of a protein. Which one(s) is affected by denaturation? 6. Draw the dipeptide formed from glycine and alanine. 114
8. a. Explain why the melting point of pure phthalic acid is higher than that of...
8. a. Explain why the melting point of pure phthalic acid is higher than that of pure napthalene, when the two compounds have nearly the same molecular weight. b. Explain why the melting point of pure hexane is hgiher than that of pure cyclo-hexane, when the two compounds have nearly the same molecular weight. (Hint: reffer to structures)
Cinnamic acid and urea melt at 133°C. The melting point of an unknown is found to...
Cinnamic acid and urea melt at 133°C. The melting point of an unknown is found to be 133°C. What experiments using melting range determinations could be done to determine if the unknown is cinnamic acid or urea?
why isnt the benzoic acid answer?꙼̈ melting points of Benzoic acid and Phenyl succinate are both...
why isnt the benzoic acid answer?꙼̈
melting points of Benzoic acid and Phenyl succinate are both
121 celsius in the chart. can you please explain?꙼̈
1. An unknown compound X is one of the four compounds listed in the following table. A mixture of X with benzoic acid melts at 89°C, a mixture of X with phenylsuccinate melts at 20°C, and a mixture of X with m-aminophenol melts at 102°C. What is the identity of X? Explain Chemnical mp. ("C)...
The product was 2,3-dibromo-3-phenylpropanoic acid, with a
melting point of 198-200 °C . So a racemic mixture of (2R,3S) and
(2S,3R).
Based on your knowledge of the bromination of alkenes, did this alkene behave like other alkenes, or was the mechanism different than what you expected? (1 pt) ОН NHBrz acetic acid NHBr Br 0 OH Br 2,3-dibromo-3- phenylpropanoic acid pyridinium bromide trans cinnamic acid pyridinium bromide perbromide
K2CO3 1.5 H20 Br он heat 2,3-dibromocinnamic acid trans-1-bromo-2-phenylethene Compound MW mp (C)bp (C) density (g/ml) mol) 2,3-dibromocinnamic acid 307.97 93-95 (threo) n'a n a 202-204 (erythro)E K CO.1.5H:O1 methylene chloride 138.21 84.93 56.11 891 na n a n'a 39.6 n a n a 1.33 n a 3 MKOH 2. a. What is the by-product formed in this reaction (not shown in given reaction equation)? b. What is the purpose of adding 3 M KOH at the beginning of the...
Reduction of Benzil:
Meso melting point = 137-139
Experimental melting point = 136.6-137.9
Can someone please help with part b and c thanks!
b) Sketch the functional group region of the IR of the product and provide wavenumbers of relevant peaks. c) Based on your IR data, was your reaction successful? Explain, citing peaks to illustrate your point.
b) Sketch the functional group region of the IR of the product and provide wavenumbers of relevant peaks. c) Based on your...
Based on the melting point and specific rotation experimental
data:
a.draw the structure(s) of the product(s) of the trans-cinnamic
acid addition reaction with bromine.
b. State whether the addition of Br2followed asyn or
antiaddition or both. Give reasons.
c. Is this product chiral? If so, identify the chirality
centers.
d. Is the product of the trans-cinnamic acid addition reaction
with bromine optically active? Give reasons.
e. Is your answer to Question 2d what you expected? Give
reasons.
f. What is...
A solid unknown has a melting point range of around 115-117 deg
C and has a IR spectrum shown below. What is the likely
structure/name of the compound?
3. Draw the triacylglyceride formed from glycerol and three molecules of oleic acid. 4. The melting point of stearic acid is 70°C, and the melting point of oleic acid is 4°C. Explain in detail why their melting points are so different. 5. Describe the primary, secondary and tertiary levels of structure of a protein. Which one(s) is affected by denaturation? 6. Draw the dipeptide formed from glycine and alanine. 114
Cinnamic acid and urea melt at 133°C. The melting point of an unknown is found to be 133°C. What experiments using melting range determinations could be done to determine if the unknown is cinnamic acid or urea?
why isnt the benzoic acid answer?꙼̈
melting points of Benzoic acid and Phenyl succinate are both
121 celsius in the chart. can you please explain?꙼̈
1. An unknown compound X is one of the four compounds listed in the following table. A mixture of X with benzoic acid melts at 89°C, a mixture of X with phenylsuccinate melts at 20°C, and a mixture of X with m-aminophenol melts at 102°C. What is the identity of X? Explain Chemnical mp. ("C)...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago