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D. (4 pts) Hydroboration of 1-methylcyclopentene (1) is regioselective, trans-2-methylcyclopentyl borane (2) is the major product....
(4 pts) Hydroboration of 1-methylcyclopentene (1) is regioselective; trans-2-methylcyclopentyl borane (2) is the major product. Draw...
(4 pts) Hydroboration of 1-methylcyclopentene (1) is regioselective; trans-2-methylcyclopentyl borane (2) is the major product. Draw two transition state structures for the hydroboration of 1 in the boxes provided that account for each alkyl borane 2 & 3. Use dotted lines (-----) to indicate partial bond formation and partial bond cleavage. Indicate partially positive and partially negative atoms with delta signs (8+ & d). BH2 H CH3 2 BH3 -CH3 H BH2 CH3 3
1) Hydration of the carbon-carbon double bond in alpha-pinene can in principle result in four dif...
please explain!
1) Hydration of the carbon-carbon double bond in alpha-pinene can in principle result in four different products (see chart below). However, the reaction sequence you performed is highly regioselective and stereospecific. Draw the mechanism of the hydroboration reaction (the first step of the sequence), and explain which product is expected and why (10 points). CH3 H3C CH3 (1S-()a-pinene (1) 3- CH, он CH3 CH3 isopinocampheol (2) mp 51-53 °C neoisopinocampheol (3) mp 45-47 °C CH3 он H3C CH3...
Question 20 7.33 pts Identify the major product resulting from the following reaction. 1) BH3-THE 2)...
Question 20 7.33 pts Identify the major product resulting from the following reaction. 1) BH3-THE 2) CH,CO,D CH3 c) D D сн. CH CH3 CH3 ОА OB oc OD Question 21 7.33 pts Which of the following compounds would you expect to be the MAJOR product under the reaction conditions shown? (adapted from Droblem 21 Question 21 7.33 pts Which of the following compounds would you expect to be the MAJOR product under the reaction conditions shown? (adapted from Problem...
4. (2 points) For the following S2 reaction, (a) predict the product, including stereochemistry, and (b)...
4. (2 points) For the following S2 reaction, (a) predict the product, including stereochemistry, and (b) draw the 3D transition state structure leading to the S2 product (using lines, dashes, wedges, dotted lines for partial bonds, and any needed partial charges). (a) OTs кCN CH3 (b) Transition state structure 5. (3 points) Complete the following sequences by filling in missing reagents from the list provided. Sequential steps, if necessary, should be numbered. Он Reagent List: PCI3 pyridine НС PBr3 NaH...
please explain why this is achiral and not chiral. 1 (4 pts). Draw the expected major...
please explain why this is achiral and not chiral.
1 (4 pts). Draw the expected major product from the following reaction by placing appropriate groups (H, Br, CH3 on the scaffold). Circle whether the product is achiral or chiral. CH3 CH3 Br2 Br H₃C CH3 Br chiral or achiral a How is it achiral?
What major product forms from the following E2 elimination reaction? Answer options: Question 4 1.5 pts...
What major product forms from the following E2
elimination reaction?
Answer options:
Question 4 1.5 pts What major product forms from the following E2 elimination reaction? CH3 Br excess KOH ethanol, heat CH3 Hints: (1) Please be sure you understand where the possible anti-periplanar eliminations can occur for this substituted cyclohexane. Therefore, it is recommended that you convert the starting alkyl halide into its chair structural representation. (2) The ring beta-proton should be trans to the alpha-halogen leaving group in...
2). Consider the following intramolecular S2 reaction. no ♡ + HI A) (5 pts) Use the...
2). Consider the following intramolecular S2 reaction. no ♡ + HI A) (5 pts) Use the table of Bond Dissociation Enthalpies (at the back of the exam) to calculate the approximate ΔΗπη. B) (3 pts) Is the reaction endothermic or exothermic? Why? C) (6 pts) Draw the Reaction Energy Coordinate Diagram. Label the axes, reactant(s), product(s), transition state(s), intermediate(s), activation energy, and reaction enthalpy. D) (3 pts) In regards to entropy, would you expect the reaction to be favorable, or...
1. For each of the following structures, i. write the IUPAC name. (2 pts.) ii. classify...
1. For each of the following structures, i. write the IUPAC name. (2 pts.) ii. classify each halogen as 1º, 2º, or 3º. (1 pt.) 2. Draw structures for the following alkyl halides. Be sure to indicate any stereochemistry as needed. (2 pts. each) a. 3,6-dibromo-3,6-dichlorononane b. 2-iodo-2-methylpentane Page 3 4. Indicate which alkyl halide you would expect to react more rapidly by an S12 mechanism. (2 pts.) Explain your answer. (2 pts.) 3. i. State which reagent you would...
What is answer of #6??? Lab Section: 0 2 Report: Hydroboration of 1-Methylcyclohexene Mechanism / GC...
What is answer of #6???
Lab Section: 0 2 Report: Hydroboration of 1-Methylcyclohexene Mechanism / GC Analysis / Calculations 1. After reviewing the GC and 'H NMR spectra, what is the major product of the reaction? a. BHS. THF, OH O a. BH3. THE OH + b. 3 H2O2 3 + 3 c. NaOH OH ОН racemic racemic major 2. Draw the complete curved arrow mechanism for the reaction to produce the major product, including both the hydroboration and oxidation...
can you please explain why did he chose the circled product as a major ? I only need explaination for part a please...
can you please explain why did he chose the circled product as
a major ?
I only need explaination for part a please
explaination for part A for both questions please
For the following a) Circle the major organic product (1 pt) reaction: b) Provide a mechanism for the initiation and two propagation steps (major only) (5 pts) c) Calculate AH001. AH , and AH (4 pts) d) Which is the rate determining propagation step (1 pt)? Explain (3 pts)...
(4 pts) Hydroboration of 1-methylcyclopentene (1) is regioselective; trans-2-methylcyclopentyl borane (2) is the major product. Draw two transition state structures for the hydroboration of 1 in the boxes provided that account for each alkyl borane 2 & 3. Use dotted lines (-----) to indicate partial bond formation and partial bond cleavage. Indicate partially positive and partially negative atoms with delta signs (8+ & d). BH2 H CH3 2 BH3 -CH3 H BH2 CH3 3
please explain!
1) Hydration of the carbon-carbon double bond in alpha-pinene can in principle result in four different products (see chart below). However, the reaction sequence you performed is highly regioselective and stereospecific. Draw the mechanism of the hydroboration reaction (the first step of the sequence), and explain which product is expected and why (10 points). CH3 H3C CH3 (1S-()a-pinene (1) 3- CH, он CH3 CH3 isopinocampheol (2) mp 51-53 °C neoisopinocampheol (3) mp 45-47 °C CH3 он H3C CH3...
Question 20 7.33 pts Identify the major product resulting from the following reaction. 1) BH3-THE 2) CH,CO,D CH3 c) D D сн. CH CH3 CH3 ОА OB oc OD Question 21 7.33 pts Which of the following compounds would you expect to be the MAJOR product under the reaction conditions shown? (adapted from Droblem 21 Question 21 7.33 pts Which of the following compounds would you expect to be the MAJOR product under the reaction conditions shown? (adapted from Problem...
4. (2 points) For the following S2 reaction, (a) predict the product, including stereochemistry, and (b) draw the 3D transition state structure leading to the S2 product (using lines, dashes, wedges, dotted lines for partial bonds, and any needed partial charges). (a) OTs кCN CH3 (b) Transition state structure 5. (3 points) Complete the following sequences by filling in missing reagents from the list provided. Sequential steps, if necessary, should be numbered. Он Reagent List: PCI3 pyridine НС PBr3 NaH...
please explain why this is achiral and not chiral.
1 (4 pts). Draw the expected major product from the following reaction by placing appropriate groups (H, Br, CH3 on the scaffold). Circle whether the product is achiral or chiral. CH3 CH3 Br2 Br H₃C CH3 Br chiral or achiral a How is it achiral?
What major product forms from the following E2
elimination reaction?
Answer options:
Question 4 1.5 pts What major product forms from the following E2 elimination reaction? CH3 Br excess KOH ethanol, heat CH3 Hints: (1) Please be sure you understand where the possible anti-periplanar eliminations can occur for this substituted cyclohexane. Therefore, it is recommended that you convert the starting alkyl halide into its chair structural representation. (2) The ring beta-proton should be trans to the alpha-halogen leaving group in...
2). Consider the following intramolecular S2 reaction. no ♡ + HI A) (5 pts) Use the table of Bond Dissociation Enthalpies (at the back of the exam) to calculate the approximate ΔΗπη. B) (3 pts) Is the reaction endothermic or exothermic? Why? C) (6 pts) Draw the Reaction Energy Coordinate Diagram. Label the axes, reactant(s), product(s), transition state(s), intermediate(s), activation energy, and reaction enthalpy. D) (3 pts) In regards to entropy, would you expect the reaction to be favorable, or...
1. For each of the following structures, i. write the IUPAC name. (2 pts.) ii. classify each halogen as 1º, 2º, or 3º. (1 pt.) 2. Draw structures for the following alkyl halides. Be sure to indicate any stereochemistry as needed. (2 pts. each) a. 3,6-dibromo-3,6-dichlorononane b. 2-iodo-2-methylpentane Page 3 4. Indicate which alkyl halide you would expect to react more rapidly by an S12 mechanism. (2 pts.) Explain your answer. (2 pts.) 3. i. State which reagent you would...
What is answer of #6???
Lab Section: 0 2 Report: Hydroboration of 1-Methylcyclohexene Mechanism / GC Analysis / Calculations 1. After reviewing the GC and 'H NMR spectra, what is the major product of the reaction? a. BHS. THF, OH O a. BH3. THE OH + b. 3 H2O2 3 + 3 c. NaOH OH ОН racemic racemic major 2. Draw the complete curved arrow mechanism for the reaction to produce the major product, including both the hydroboration and oxidation...
can you please explain why did he chose the circled product as
a major ?
I only need explaination for part a please
explaination for part A for both questions please
For the following a) Circle the major organic product (1 pt) reaction: b) Provide a mechanism for the initiation and two propagation steps (major only) (5 pts) c) Calculate AH001. AH , and AH (4 pts) d) Which is the rate determining propagation step (1 pt)? Explain (3 pts)...
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