Homework Answers
When least priority group is towards the observer, orientation is inversed. But when it's away from observer ( below the plane) configuration remains same.
Same rules for (C) and (D)
Meso compounds are : A and B ( these are optically inactive because these molecules are superimposable on their mirror images and thus the molecule and mirror image are same molecule.)
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Experiment 10 Questions A. Determine the possible products for this reaction. Make sure to match...
Caption Emphasis Heading 1 Head 1. Complete the structures of possible stereoisomers of the bromination products...
Caption Emphasis Heading 1 Head 1. Complete the structures of possible stereoisomers of the bromination products from in this experiment. Be sure to show stereochemistry. Name Structure Name Structure Br Br (1R,25)-1,2-dibromo- 1,2-diphenylethane (15,25)-1,2-dibromo- 1,2-diphenylethane Br Br Br Br 15,2R)-1,2-dibromo- 1,2-diphenylethane 1 (1R, 2R)-1,2-dibromo- 1,2-diphenylethane Br Br i. Which of the above 1,2-dibromo-1,2-diphenylethane stereoisomers would be called meso-isomers? ii. Which two of the above four 1,2-dibromo-1,2-diphenylethane stereoisomers would make up a racemic mixture? iii. Which of the possible stereoisomers would...
Complete the following reaction sequences by drawing the major products or the reagents necessary to make...
Complete the following reaction sequences by drawing the major
products or the reagents necessary to make them. Be sure to include
stereochemistry when appropriate.
1. (48 pts) Complete the following reaction sequences by drawing the major products or the reagents necessary to make them. Be sure to include stereochemistry when appropriate. HBr Benzene FeBr3 HO NaH DMF hv NaNH2 2 BnBr CH2Cl2 Benzene Br2 cat. H+ H2o Ph NaOH NBS H Br H20 hv
3. There are two possible substitution products fr products and a complete mechanism for their for...
3. There are two possible substitution products fr products and a complete mechanism for their for IUPAC system and circle the major product. Ustitution products from the reaction of 3,3-dimethyl-2-butanol with aq. HBr. Draw the mechanism for their formation, including all intermediates. Name both products based on the :OH MW: 102. Ts-gimo 4. Based on the reaction above, calculate the theoretical yield for the reaction based on 2.0 g of the 3,3-dimethyl-2- butanol and 5 mL of the 48% HBr....
a) Draw a chemical equation for the reaction in this lab, clearly indicate the possible stereochemistry...
a) Draw a chemical equation for the reaction in this lab, clearly indicate the possible stereochemistry (R/S) of all potential products (Newman Projection) from cis and trans addition to the double bond of trans-stilbene. (Hint see Expt. 3) Clearly indicate meso compounds if any. Br Br Ph Br Ph Br Br b) Draw a reaction mechanism for the reaction between bromine and trans-stilbene. Clearly shovw the nucleophilic attack of Br- on both carbons of the cyclic bromenium ion and the...
1) determine the number of milliliters of 4.75 M CBr2H2 solution that are needed to make...
1) determine the number of milliliters of 4.75 M CBr2H2 solution that are needed to make 65.5 ml of 1.05 M of that same solution. 2) determine the number of grams of CaCl2 that are needed to make a 0.355 liters of a 1.25 Molar solution. 3) 2Al(s) + 6HCl(g) → AlCl3(aq) + 3H2(g). Determine the grams of H2 produced 5.40 grams of Al. This calculated value is the Theoretical yield. This Theoretical yield is to be used in problem...
There are three possible products from this experiment: the Markovnikov addition product (1methylcyclohexanol), and the two...
There are three possible products from this experiment: the Markovnikov addition product (1methylcyclohexanol), and the two anti-Markovnikov addition products ((15,2R)-2-methyl- 1cyclohexanol and (1R 2R)-2-methyl-1-cyclohexanol). 1. BH "THE 2. H2O2. NaOH or 3 or 3 OH 1-methyl-1-cyclohexene 1. What is your predicted product? Why? 2. Calculate the theoretical yield. Show calculations including those for the limiting reactant. 0.5 mL of 1-methyl-1-cyclohexene 2.5 mL of 1 M BH, THF solution 0.7 mL of 3 M NaOH followed by 1 mL of 30%...
I need help with #2 please explain step by step. POST LAB QUESTIONS 1. Predict all possible bromination products of...
I need help with #2 please explain step by step.
POST LAB QUESTIONS 1. Predict all possible bromination products of the following substrate using the above reaction conditions. Show stereochemistry (i.e. dashed and wedged bonds, and label chiral centers (R or S), if necessary. Dogou or dilbi o bando sobre in the manica Br2 YCHE CH3 2. A researcher performs the above reaction starting with 0.150 g of the alkene substrate, 0.375 g of pyridinium tribromide, and 2.00 mL of...
Experiment 9-Post-lab Questions 1. Methanol (CH,OH) can be produced by the reaction of carbon monoxide (CO)...
Experiment 9-Post-lab Questions 1. Methanol (CH,OH) can be produced by the reaction of carbon monoxide (CO) with hydrogen (H,). The balanced chemical reaction is: cO@)+2 H, (g)CH,OH() Suppose 14.0 g of carbon monoxide is reacted with 8.0 g of hydrogen. a. Which reactant is the limiting reagent? b. What is the theoretical yield for methanol? c. At the completion of the reaction, how many grams of the excess reagent will remain? 2. Iron(III) oxide (Fe,O,) can be converted to iron...
Post-Lab Questions for "4Methylcyclohexene Experiment 1. Write a step-wise, arrow.pushing mechanism for the reaction. H2SO4 (aq,conc.,...
Post-Lab Questions for "4Methylcyclohexene Experiment 1. Write a step-wise, arrow.pushing mechanism for the reaction. H2SO4 (aq,conc., 6 drops) HYPO, (0.4 mL) dropel. Q . Ho 2. While the reaction in the lab text gives the product 4-methylcyclohexene, it is possible that several products are formed in this reaction, including 1-methylcyclohexene, because of 1,2-hydride shifts in the carbo-cation intermediate. Show a step-wise, arrow.pushing mechanism for the formation of 1-methylcyclohexene. 1-methylcyclohexene 3. Be sure to calculate an overall percent yield of methylcyclohexenes...
1) Write a stepwise mechanisms for the bromination of: a) trans-stilbene and b) cis-stilbene (substitute benzene...
1) Write a stepwise mechanisms for the bromination of: a) trans-stilbene and b) cis-stilbene (substitute benzene rings by Ph-notation for convenience; e.g., stilbene could be written as Ph- CH=CH-Ph). I 2) Use (S) and (R) nomenclature to label all stereogenic centers in the above products (each has two stereogenic centers) in problem 1. Identify any enantiomers and meso-products. 3) Complete the following table including formula weights and grams and moles of reagents used in order to calculate a theoretical yield...
Caption Emphasis Heading 1 Head 1. Complete the structures of possible stereoisomers of the bromination products from in this experiment. Be sure to show stereochemistry. Name Structure Name Structure Br Br (1R,25)-1,2-dibromo- 1,2-diphenylethane (15,25)-1,2-dibromo- 1,2-diphenylethane Br Br Br Br 15,2R)-1,2-dibromo- 1,2-diphenylethane 1 (1R, 2R)-1,2-dibromo- 1,2-diphenylethane Br Br i. Which of the above 1,2-dibromo-1,2-diphenylethane stereoisomers would be called meso-isomers? ii. Which two of the above four 1,2-dibromo-1,2-diphenylethane stereoisomers would make up a racemic mixture? iii. Which of the possible stereoisomers would...
Complete the following reaction sequences by drawing the major
products or the reagents necessary to make them. Be sure to include
stereochemistry when appropriate.
1. (48 pts) Complete the following reaction sequences by drawing the major products or the reagents necessary to make them. Be sure to include stereochemistry when appropriate. HBr Benzene FeBr3 HO NaH DMF hv NaNH2 2 BnBr CH2Cl2 Benzene Br2 cat. H+ H2o Ph NaOH NBS H Br H20 hv
3. There are two possible substitution products fr products and a complete mechanism for their for IUPAC system and circle the major product. Ustitution products from the reaction of 3,3-dimethyl-2-butanol with aq. HBr. Draw the mechanism for their formation, including all intermediates. Name both products based on the :OH MW: 102. Ts-gimo 4. Based on the reaction above, calculate the theoretical yield for the reaction based on 2.0 g of the 3,3-dimethyl-2- butanol and 5 mL of the 48% HBr....
a) Draw a chemical equation for the reaction in this lab, clearly indicate the possible stereochemistry (R/S) of all potential products (Newman Projection) from cis and trans addition to the double bond of trans-stilbene. (Hint see Expt. 3) Clearly indicate meso compounds if any. Br Br Ph Br Ph Br Br b) Draw a reaction mechanism for the reaction between bromine and trans-stilbene. Clearly shovw the nucleophilic attack of Br- on both carbons of the cyclic bromenium ion and the...
There are three possible products from this experiment: the Markovnikov addition product (1methylcyclohexanol), and the two anti-Markovnikov addition products ((15,2R)-2-methyl- 1cyclohexanol and (1R 2R)-2-methyl-1-cyclohexanol). 1. BH "THE 2. H2O2. NaOH or 3 or 3 OH 1-methyl-1-cyclohexene 1. What is your predicted product? Why? 2. Calculate the theoretical yield. Show calculations including those for the limiting reactant. 0.5 mL of 1-methyl-1-cyclohexene 2.5 mL of 1 M BH, THF solution 0.7 mL of 3 M NaOH followed by 1 mL of 30%...
I need help with #2 please explain step by step.
POST LAB QUESTIONS 1. Predict all possible bromination products of the following substrate using the above reaction conditions. Show stereochemistry (i.e. dashed and wedged bonds, and label chiral centers (R or S), if necessary. Dogou or dilbi o bando sobre in the manica Br2 YCHE CH3 2. A researcher performs the above reaction starting with 0.150 g of the alkene substrate, 0.375 g of pyridinium tribromide, and 2.00 mL of...
Experiment 9-Post-lab Questions 1. Methanol (CH,OH) can be produced by the reaction of carbon monoxide (CO) with hydrogen (H,). The balanced chemical reaction is: cO@)+2 H, (g)CH,OH() Suppose 14.0 g of carbon monoxide is reacted with 8.0 g of hydrogen. a. Which reactant is the limiting reagent? b. What is the theoretical yield for methanol? c. At the completion of the reaction, how many grams of the excess reagent will remain? 2. Iron(III) oxide (Fe,O,) can be converted to iron...
Post-Lab Questions for "4Methylcyclohexene Experiment 1. Write a step-wise, arrow.pushing mechanism for the reaction. H2SO4 (aq,conc., 6 drops) HYPO, (0.4 mL) dropel. Q . Ho 2. While the reaction in the lab text gives the product 4-methylcyclohexene, it is possible that several products are formed in this reaction, including 1-methylcyclohexene, because of 1,2-hydride shifts in the carbo-cation intermediate. Show a step-wise, arrow.pushing mechanism for the formation of 1-methylcyclohexene. 1-methylcyclohexene 3. Be sure to calculate an overall percent yield of methylcyclohexenes...
1) Write a stepwise mechanisms for the bromination of: a) trans-stilbene and b) cis-stilbene (substitute benzene rings by Ph-notation for convenience; e.g., stilbene could be written as Ph- CH=CH-Ph). I 2) Use (S) and (R) nomenclature to label all stereogenic centers in the above products (each has two stereogenic centers) in problem 1. Identify any enantiomers and meso-products. 3) Complete the following table including formula weights and grams and moles of reagents used in order to calculate a theoretical yield...
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