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Question 3 (a) Name the following molecule: H3C CH [Marks: 1] (b) If the all stereo...
Please help with all the parts! Question 3 (a) Name the following molecule: H3C OH CH3...
Please help with all the parts!
Question 3 (a) Name the following molecule: H3C OH CH3 a. [Marks: 11 i. If the all stereo centres are the R form; draw the Newman projection of the 3-4 bond of the molecule in part (a). ii. Using those projections sketch a rotational energy diagram for the conformers of the 3-4 bond. Assume that the highest steric/torsional strain is between the hydroxyl and vinyl groups [Marks: 3 (c) Show the mechanism for the...
(a) Draw the saw-horse (or wedge-dash) projection of (2S,3R)-3-methylpentan-2-ol. [Marks: 1] (b) Draw the Newman projections...
(a) Draw the saw-horse (or wedge-dash) projection of (2S,3R)-3-methylpentan-2-ol. [Marks: 1] (b) Draw the Newman projections of the 2-3 bond in (2S,3R)-3-methylpentan-2-ol. [Marks: 2] (c) Based on the Newman projections from part b. - draw a rotation vs. energy diagram (you do NOT need to give specific energy values in this diagram) that will allow you to identify the most stable confirmation around the 2-3 bond. Assume the greatest steric and torsional strain occurs when the hydroxyl and ethyl groups...
OCH3 3. Indicate the electrophilic or nucleophilic centers for the following compounds: a) b) d) 4. Answer the foll...
OCH3 3. Indicate the electrophilic or nucleophilic centers for the following compounds: a) b) d) 4. Answer the following questions regarding 2,3-dimethylbutane: a) draw any staggered Newman projection of this compound looking down the C2-C3 bond. b) draw the highest energy conformation (as a Newman projection). Label each example of steric and/or torsional strain. c) draw the lowest energy conformation. Identify any sources of steric or torsional strain if present. m md iminetahm 5 Draw tra possiblechair conformatex For Jbrom-s-7ethiTmethychayo...
Please provide explainations for your answers. Thanks! 1. Draw 3 contributing resonance structures of the molecule...
Please provide explainations for your answers. Thanks!
1. Draw 3 contributing resonance structures of the molecule shown. OCH H2N OCH3 A B Which structure do you suppose contributes most? Why? 2. Provide the IUPAC name for the molecule shown below. Br IUPAC name: Ph 3. Draw the 6 Newman projections for the molecule shown, looking down the C(2)-C(3) bond. Circle the Newman projection that you think would be most stable. Use the table of gauche interactions to determine your answer...
7. Consider the reaction below to answer the following question(s). CH H3C-c-c13;0 CH7 HC H3C-C-OH +...
7. Consider the reaction below to answer the following question(s). CH H3C-c-c13;0 CH7 HC H3C-C-OH + C=CH, H2C ethanol CH CH3 The substrate in the reaction is: (1 pt) Compound B is the product of mechanism (1 pt) Compound C is the product of mechanism (1 pt) Write the complete reaction mechanism for the formation of Compound C in this reaction. (2 pts) Final Exam- Part 11 (40 pts) Dr. Indika Galpothdeniya 8. Consider the reaction below to answer the...
Question 1: Compare the possible ring structures and conformers for fructose and decide which is preferred...
Question 1: Compare the possible ring
structures and conformers for fructose and decide which is
preferred (if any). There are four main hemi-ketal rings, one of
which is shown below. What factors might influence the preference
for 5- or 6-membered rings?
Question 2: Make a model of vitamin C. Note the
lactone link that forms the ring, rather than the hemi-ketal that
is present in fructose. Do you think the presence of sp2
carbons in the ring induce strain? Does...
6. Provide the IUPAC names for the compounds below Name: 7. Draw the following: cis-1-isobutyl-2-propyleyclopentane 8....
6. Provide the IUPAC names for the compounds below Name: 7. Draw the following: cis-1-isobutyl-2-propyleyclopentane 8. Label the indicated atoms in the structure below as 1º, 2º, 3º, or 4º. PB A A B co 9. Draw Newman projections for the day-diethylane about the C4CS bond, Circle the most stable conforme if you need additional space, please feel free to the backside of this paper 10. Draw the chair conformation and ring-flip for the given compound. Calculate the sterie strain...
Can answer in multiple choice way 1. The following is FALSE about acid and bases: a....
Can
answer in multiple choice way
1. The following is FALSE about acid and bases: a. Weak acids generate weak conjugated bases. b. Acids can only protonate bases with higher pka values. c. Metal ions can be acids. d. Acid-base reactions favor weaker acids. 5. What are the expected products of the following reaction? 2. Which molecule is the most acidic? a. HCN (pKa = 4.7) . b. Isopropanol (pka - 17.1) c. water (pKa - 15.7) d. ammonia (pka...
Please help with all the parts!
Question 3 (a) Name the following molecule: H3C OH CH3 a. [Marks: 11 i. If the all stereo centres are the R form; draw the Newman projection of the 3-4 bond of the molecule in part (a). ii. Using those projections sketch a rotational energy diagram for the conformers of the 3-4 bond. Assume that the highest steric/torsional strain is between the hydroxyl and vinyl groups [Marks: 3 (c) Show the mechanism for the...
(a) Draw the saw-horse (or wedge-dash) projection of (2S,3R)-3-methylpentan-2-ol. [Marks: 1] (b) Draw the Newman projections of the 2-3 bond in (2S,3R)-3-methylpentan-2-ol. [Marks: 2] (c) Based on the Newman projections from part b. - draw a rotation vs. energy diagram (you do NOT need to give specific energy values in this diagram) that will allow you to identify the most stable confirmation around the 2-3 bond. Assume the greatest steric and torsional strain occurs when the hydroxyl and ethyl groups...
OCH3 3. Indicate the electrophilic or nucleophilic centers for the following compounds: a) b) d) 4. Answer the following questions regarding 2,3-dimethylbutane: a) draw any staggered Newman projection of this compound looking down the C2-C3 bond. b) draw the highest energy conformation (as a Newman projection). Label each example of steric and/or torsional strain. c) draw the lowest energy conformation. Identify any sources of steric or torsional strain if present. m md iminetahm 5 Draw tra possiblechair conformatex For Jbrom-s-7ethiTmethychayo...
Please provide explainations for your answers. Thanks!
1. Draw 3 contributing resonance structures of the molecule shown. OCH H2N OCH3 A B Which structure do you suppose contributes most? Why? 2. Provide the IUPAC name for the molecule shown below. Br IUPAC name: Ph 3. Draw the 6 Newman projections for the molecule shown, looking down the C(2)-C(3) bond. Circle the Newman projection that you think would be most stable. Use the table of gauche interactions to determine your answer...
7. Consider the reaction below to answer the following question(s). CH H3C-c-c13;0 CH7 HC H3C-C-OH + C=CH, H2C ethanol CH CH3 The substrate in the reaction is: (1 pt) Compound B is the product of mechanism (1 pt) Compound C is the product of mechanism (1 pt) Write the complete reaction mechanism for the formation of Compound C in this reaction. (2 pts) Final Exam- Part 11 (40 pts) Dr. Indika Galpothdeniya 8. Consider the reaction below to answer the...
Question 1: Compare the possible ring
structures and conformers for fructose and decide which is
preferred (if any). There are four main hemi-ketal rings, one of
which is shown below. What factors might influence the preference
for 5- or 6-membered rings?
Question 2: Make a model of vitamin C. Note the
lactone link that forms the ring, rather than the hemi-ketal that
is present in fructose. Do you think the presence of sp2
carbons in the ring induce strain? Does...
6. Provide the IUPAC names for the compounds below Name: 7. Draw the following: cis-1-isobutyl-2-propyleyclopentane 8. Label the indicated atoms in the structure below as 1º, 2º, 3º, or 4º. PB A A B co 9. Draw Newman projections for the day-diethylane about the C4CS bond, Circle the most stable conforme if you need additional space, please feel free to the backside of this paper 10. Draw the chair conformation and ring-flip for the given compound. Calculate the sterie strain...
Can
answer in multiple choice way
1. The following is FALSE about acid and bases: a. Weak acids generate weak conjugated bases. b. Acids can only protonate bases with higher pka values. c. Metal ions can be acids. d. Acid-base reactions favor weaker acids. 5. What are the expected products of the following reaction? 2. Which molecule is the most acidic? a. HCN (pKa = 4.7) . b. Isopropanol (pka - 17.1) c. water (pKa - 15.7) d. ammonia (pka...
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