Assignment Task

Task:

1. For each of the structures below, indicate the most acidic hydrogen and draw the most important resonance form of the conjugate base.

Figure1.JPG

2. Rank the basic compounds below from strongest (1) to weakest (4). For each compound, indicate the hybridization of the nitrogen. Explain your choices.

Figure2.JPG

3. Predict the product of each of the reactions below, showing any intermediates formed.

Figure.JPG

Figure4.JPG

Figure5.JPG

4. Aldose A is optically active, but treatment with NaBH4 gives alditol B, which is optically inactive. Aldose A undergoes Ruff degradation to give Compound C. When Compound C is treated with NaBH4 , optically inactive alditol D is formed. However, when C undergoes Ruff degradation, optically active D-glyceraldehyde is obtained. Give the structures and names of sugars A–D.

5. Outline the synthesis for each of the transitions shown below

Figure6.JPG

Figure7.JPG

6. All aldoses exhibit mutarotation. For example, α-D-galactopyranose has [α]D = +150.7 and β-D-galactopyranise has [α]D = +52.8. If either anomer is dissolved in water and allowed to reach equilibrium, the specific rotation of the solution is +80.2. What are the percentages of each anomer at equilibrium? Draw the pyranose forms of both anomers.

7. a. Assign an R or S configuration to each stereogenic centre in xylose:

D-xylose.JPG

b. Name xylose systematically

c. What aldopentose will produce the same aldaric acid as D-xylose?

8. A student wanted to dry some diacetone alcohol A, and allowed it to stand over anhydrous potassium carbonate for a week. At the end of the week, the sample was found to contain pure acetone. Propose a mechanism for the reaction that took place.

Diacetone.JPG

9. Draw the structure of each of the compounds shown below.
a. 2-phenylethyl azide
b. meta-bromobenzoyl bromide
c. N-methylpyrrolidine
d. 2-ethylpentane nitrile
e. phthalimide

 

This Chemistry Assignment has been solved by our Chemistry Experts at UniLearnO. Our Assignment Writing Experts are efficient to provide a fresh solution to this question. We are serving more than 10000+ Students in Australia, UK & US by helping them to score HD in their academics. Our Experts are well trained to follow all marking rubrics & referencing style.

Be it a used or new solution, the quality of the work submitted by our assignment experts remains unhampered. You may continue to expect the same or even better quality with the used and new assignment solution files respectively. There’s one thing to be noticed that you could choose one between the two and acquire an HD either way. You could choose a new assignment solution file to get yourself an exclusive, plagiarism (with free Turnitin file), expert quality assignment or order an old solution file that was considered worthy of the highest distinction.

Eureka! You've stumped our genius minds (for now)! This exciting new question has our experts buzzing with curiosity. We can't wait to craft a fresh solution just for you!

  • Uploaded By : Mia
  • Posted on : September 10th, 2018

Whatsapp Tap to ChatGet instant assistance