
1. Consider an aldohexose. Draw each of the following types of structure for the aldohexose. Structures...
3) a) Draw the Fischer projection of the following sugars and
label them D or L. HO
b) Draw the most stable chair conformation of the b-anomer of the
hemiacetal of the following
aldohexose:
3) a) Draw the Fischer projection of the following sugars and label them Dor L. НО. H CHO он НО H он Н. ОН НО. CHO ли нон н он b) Draw the most stable chair conformation of the B-anomer of the hemiacetal of the following...
In-Class Worksheet In the box below each molecule, draw Newman projections for the structures A, B, and C shown from the perspective indicated. For each Newman projection that you've drawn, indicate if there are any eclipsed bonds or 1. gauche butane interactions. H H CH3 H3C CH3 CH3 H. H3C CH3 H CH3 H H Structure C Structure B Structure A Structure A can exist in a lower energy conformation by undergoing a bond rotation; draw the Newman projection of...
Name: Problem of the week #15 (for week 16)-November 27, 2018 (Tuesday) oChem2 (Section 4, CHE 3643.004)-BONUS!) EXTRA HOMEWORK Chapters 28/29-Sugars/Amino Acids (Will be collected on NOVEMBER 29, 2018- THURSDAY:*8:30AM 1. Below is the "staggered structure of D-glucose: D-glucose (A) Starting from the "staggered" conformation, draw D-glucose as a Fischer projection (you will have to draw the "eclipsed" conformation first). Go through all of the steps to show how you came up with the Fischer projection of D-glucose. Your eclipsed...
When drawing substituted cyclohexanes, they can be drawn in either a chair form (with axial and equatorial substituents) or in a line form (using wedges and dashes to indicate the relative positions and locations of substituents). These same types of drawings can be used to illustrate what happens after a chair flip (aka ring flip). Given the structures drawn in each part below, draw the corresponding chair conformation that would result from a chair flip.When drawing your chair structures change...
1.
Which of the following is an aldohexose?
2. Which of the following is a cetopentose?
3. Which of the following best describes the relationship
between D-glucose and D-fructose?
4. Which of the following is (are) L-alfohexose(s)?
5. Which of the following aldohexose(s) is (are)
dextrorotatory?
6. How many stereoisomers are possible for L-galactose? Draw
or look for its structure.
7. Which of the following conpounds is a pair of
enantiomers?
8. Draw the fisher projection for L-sedoheptulose and also...
18. Draw the product of the following Dieckmann cyclization: 1) NaOCH2CH3 CH3CH2OH 2) H30* 19. Glucosamine is a product of the fermentation of corn and is shown below. Draw the Fischer projection of glucosamine: OH H ОН NH2 OH 20. Draw the most stable chair conformation of the D-idose, whose Fisher projection is shown below. Is it an a-or B-anomer? CHO HO -H H- -OH HO Н H -OH CH2OH
Analyze each pair of compounds structures represent. Your cho cach pair of compounds below. Identify which class of isomers each pair of s represent. Your choices are: (i) constitutional, (ii) conformational, (iii) omers, (iv) diastereomer or (v) identical (non-isomers). Only one label for each pair should be used. For each case show work (drawings, (R)/(S), rotation of bonds, chair- "ps, etc) which led you to each answer for the pairs below. Any differences of answers between you and your peers...
Culhydrates 1. Complete th Complete the table by classifying each sugar sugar (A, B, C, D) below based on carbonyl group and number of carbons (c.8. aldohexose, ketotriose, etc.). Classify them as an antiomer. Indicate the number of chiral carbons for each sugar. Sugar Classification based on carbonyl group and number of carbons Lor D enantiomer Number of chiral carbons н-с-он HO-6-H. н-с-он ін,он CH,OH C=0 HO-C-H н-с-он HO-C-H. ён,он снон c=0 | HO-C-H ін,он H-C-OH CH, OH CD 2....
For each of the following structures, draw and label both the most stable and the least stable 1. chair conformation. Itte, 2. For each of the following chair conformations, draw the flat six-membered ring bond-line structure он но
(5 Marks) B. Answer the questions based on the structures given below i. ii. нонс нонс OH CH HOR OH HO CHOH CH, OH CH OH HO HOM H -OH CH, OH c. Identify the compounds ii, iii and iv as D or L. Explain how you came to this conclusion (2 marks) d. Draw the Fischer projection, enantiomer and indicate which carbons are chiral or achiral for the compound ii. (3 marks) e. Among the compounds iii and iv...