What are the melting point ranges of crude para-chlorobenzyl alcohol (product) in the crossed-cannizzaro reaction of pa...
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What are the melting point ranges of crude para-chlorobenzyl alcohol (product) in the crossed-cannizzaro reaction of pa...
How to determine melting point depression (when measuring from the midpoint of melting point ranges). For...
How to determine melting point depression (when measuring from the midpoint of melting point ranges). For example what would be the melting point depression of a component such as benzoic acid with a crude melting point range of (108-124) and a final melting point range of (96-108).
Compound X has just been successfully synthesized. Crystals of the crude product had a melting point...
Compound X has just been successfully synthesized. Crystals of the crude product had a melting point range of 120 - 130 °C. After recrystalization, the new melting point range was 124.5 - 125.5 °C. Which sample was more pure, the crude product or recrystallized product? Why?
What is the literature (known) melting point for acetanilide? A student performed a recrystallization to purify...
What is the literature (known) melting point for acetanilide? A student performed a recrystallization to purify a crude sample from a reaction. The amount of crude material collected from the reaction was 13.56 grams. After the purification, the student collected 8.97 grams of extremely pure material. a. What is the percent recovery of the desired material? b. Is it possible to determine how much of the desired material remained in solution after the filtration? The solubility of acetanilide in hot...
if using piperonaldehyde, what would the answers be? Write an equation for the Aldol reaction that takes place for the aldehyde you used for this experiment. Show the exact structures for aldehyd...
if
using piperonaldehyde, what would the answers be?
Write an equation for the Aldol reaction that takes place for the aldehyde you used for this experiment. Show the exact structures for aldehyde and product (not "general" structures with "R" groups). 1 2 Compare the crude and purified melting points from this lab with the literature melting point of your compound. What do these data say about the purity of your "green chalcone before and after purification? 14 When only a...
1. What is the expected product melting point if the bromination of stilbene by PHPB is...
1. What is the expected product melting point if the bromination of stilbene by PHPB is completely stereospecific (anti addition)? 2. How would the melting point be affected if the reaction is not completely stereospecific and the dibromide product contains significant amounts of dl-stilbene dibromide, as well as the expected meso stilbene dibromide? Note the widely differing melting points of the meso and dl isomers. 3. What is the theoretical yield of dibromide product in the bromination reaction? 4. How...
What conclusions did you draw about the synthesis and purity of your aspirin product by comparing...
What conclusions did you draw about the synthesis and purity of your aspirin product by comparing the melting point of your CRUDE and PURE products to the literature values? Answer in one-three sentences (8 pts)
What has a higher melting point 4-nitrobenzaldehyde in methanol or 4-nitrobenzyl alcohol? And why? TLC Ochem...
What has a higher melting point 4-nitrobenzaldehyde in methanol or 4-nitrobenzyl alcohol? And why? TLC Ochem 1
What are the names of these three unknown dehydrated products? Structure of dehydrated product literature melting...
What are the names of these three unknown dehydrated
products?
Structure of dehydrated product literature melting point (degree C) 104 - 107 (Aldrich) 175 (Mohrig, et. al, Modern Projects and Experiments in Organic Chemistry) 130 - 132 (Aldrich)
what kind of information about a compound do you get from melting point? Thin layer chromatography?...
what kind of information about a compound do you get from melting point? Thin layer chromatography? How could these be useful in assessing the product of a chemical reaction?
QUESTION 33 2 points ($18.7) What is the product of the following crossed aldol condensation? (Complete...
QUESTION 33 2 points ($18.7) What is the product of the following crossed aldol condensation? (Complete aldol reactions using two different aldehydes or ketones.) Reagents: acetyl aldehyde + p-chlorobenzaldehyde (no alpha hydrogen) + NaOH a strong base + H20 and heat.) HOA o oo QUESTION 34 2 points (518.7) Which compound, in a reaction with the ketone below, would produce the fewest side products? (Identify which aldol reactions will proceed in high yield). Reagents: starting material acetone + (1) NaOH...
What is the literature (known) melting point for acetanilide? A student performed a recrystallization to purify a crude sample from a reaction. The amount of crude material collected from the reaction was 13.56 grams. After the purification, the student collected 8.97 grams of extremely pure material. a. What is the percent recovery of the desired material? b. Is it possible to determine how much of the desired material remained in solution after the filtration? The solubility of acetanilide in hot...
if
using piperonaldehyde, what would the answers be?
Write an equation for the Aldol reaction that takes place for the aldehyde you used for this experiment. Show the exact structures for aldehyde and product (not "general" structures with "R" groups). 1 2 Compare the crude and purified melting points from this lab with the literature melting point of your compound. What do these data say about the purity of your "green chalcone before and after purification? 14 When only a...
What are the names of these three unknown dehydrated
products?
Structure of dehydrated product literature melting point (degree C) 104 - 107 (Aldrich) 175 (Mohrig, et. al, Modern Projects and Experiments in Organic Chemistry) 130 - 132 (Aldrich)
QUESTION 33 2 points ($18.7) What is the product of the following crossed aldol condensation? (Complete aldol reactions using two different aldehydes or ketones.) Reagents: acetyl aldehyde + p-chlorobenzaldehyde (no alpha hydrogen) + NaOH a strong base + H20 and heat.) HOA o oo QUESTION 34 2 points (518.7) Which compound, in a reaction with the ketone below, would produce the fewest side products? (Identify which aldol reactions will proceed in high yield). Reagents: starting material acetone + (1) NaOH...
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