Homework Answers
This is an example of Dieckmann reaction. This reaction is
base-catalyzed (C2H5ONa). In this reaction a intramolecular
condensation of a diester occurs and produce a 6-membered cyclic
ß-keto esters as follows:
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The following substrate can generate two possible enolates, but only one of those enolates can cyclize...
Please only answer if you can generate the compounds on a computer (don't handwrite). Thank you!...
Please only answer if you can generate the compounds on a
computer (don't handwrite). Thank you!
Give the major organic product and provide stereochemistry when
needed.
OCHo roca,
5) A substrate controled reaction is one which can furnish a product with high enantiomeric purity...
5) A substrate controled reaction is one which can furnish a product with high enantiomeric purity in which the stereochemistry of the starting material helps to control for the stereochemistry of the product. Below is an example of a substrate controlled reaction using chelation controlled addition of m-CPBA to the cycloalkene. Notice that only the top face as drawn obtains the oxygen of the epoxide as a result of hydrogen bonding of the chiral alcohol to the m-CPBA reagent. OH...
write major products for following reaction. (write only one product unless it has both a 1,2...
write major products for following reaction. (write only one
product unless it has both a 1,2 and a 1,4 product). when indicated
show mechanism and circle correct stereochemistry of the major
product. label examples of a kinetic and thermodynamic
product.
f. (E)-3-methyl-2-pentene + HBr with tr. peroxide **** Show Mechanism: th Major Product(s) of f. Stereochemistry of the product of the reaction described in f. (Circle one) a. R b. S c. E d. Z e. a mixture of E...
Can you explain how you came upon the answer also 1. Rank the following compounds in...
Can you explain how you came upon the answer also
1. Rank the following compounds in order of increasing stability (least to most stable). As you answer this question, think of why (give reasons) one molecule is more or less stable than another. 2. Predict the MAJOR product(s) for the reaction below. Pay close attention to stereochemistry. Provide a mechanism as to how you arrive with your answer. If your compound is chiral, indicate the configuration [(R) or (S)] of...
2-Bromo-2-methylbutane undergoes an E1 elimination reaction in the presence of ethanol. In the next reaction only one o...
2-Bromo-2-methylbutane undergoes an E1 elimination reaction in
the presence of ethanol. In the next reaction only one of the
possible products is represented. Although the product shown is not
the major product of the reaction, notice that there is more than
one way it can be produced. Complete the mechanism and draw the
missing substances.
Draw all missing reactants and/or products in the appropriate
boxes by placing atoms on the grid and connecting them with bonds,
including charges where needed....
e See page 574 Complete the mechanism. All necessary atoms and bonds (that is, those that...
e See page 574 Complete the mechanism. All necessary atoms and bonds (that is, those that are involved in the mechanism) are drawn in for you already: do not modify the structures by adding or removing any atoms Solution Explanation See Hint See page 569 15 Question (4points) The alkyl chloride shown could be the result of treating different alkenes with HCI. In the box below, dravw all the alkenes that, when treated with HCI, will generate the product shown....
We begin with the surmise that the nucleophilic substitution reactions can occur only by one of...
We begin with the surmise that the nucleophilic substitution reactions can occur only by one of two mechanisms: Sn1 solvolysis: three-step mechanism R-X slow, R® + to R® + ROH fast , ROM R' H. R-O + R'OH fast , ROR' + R- SN2: one-step mechanism R-X + Nuc slow, Nuc-R + x Begin by answering the three questions below. If you don't understand what's up, please ask! 1. Write out the rate law for the above Sn1 reaction and...
4) There are 3 different N atoms in the semicarbazide, and yet only one of them...
4) There are 3 different N atoms in the semicarbazide, and yet
only one of them is the site that does the nucleophilic attack. Why
is that N atom most reactive? Describe using structures.
Introduction Many reactions can take more than one course but the preferential formation of only one of the possible products may be attained by a judicial choice of the reaction conditions. In general, the 1 of 5 CHEM-2300 F19 Experiment 6 formation of a product is...
1. Consider the following two reactions, only one of which will work as shown: a) What...
1. Consider the following two reactions, only one of which will
work as shown:
a) What is the stereochemical relationship between starting
material A and B?
b) Draw the mechanism for the reaction to convert the starting
material into the product. You can use either starting material A
or B to show the mechanism.
c) Draw the two chair forms for starting material A and circle
the more stable chair form. Explain why the one you circled is more
stable....
If cyclohexanol(mw 100) (d=0.8 g/ml) were substituted for 2-methylcycholhexanol, only one product, cyclohexane (d=0.8 g/ml) would...
If cyclohexanol(mw 100) (d=0.8 g/ml) were substituted for 2-methylcycholhexanol, only one product, cyclohexane (d=0.8 g/ml) would be obtained. Distillation of the reaction mixture would occur at 85 C. Assume that the vapor pressures of cyclohexane and water are 152 mm and 608 mm respectively at 85 C. If 0.6 mol of water are obtained in the distillate what is the yield of cyclohexane? Assume that the bp of cyclohexane is 100 C and that cyclohexane is insoluble in water? a)...
Please only answer if you can generate the compounds on a
computer (don't handwrite). Thank you!
Give the major organic product and provide stereochemistry when
needed.
OCHo roca,
5) A substrate controled reaction is one which can furnish a product with high enantiomeric purity in which the stereochemistry of the starting material helps to control for the stereochemistry of the product. Below is an example of a substrate controlled reaction using chelation controlled addition of m-CPBA to the cycloalkene. Notice that only the top face as drawn obtains the oxygen of the epoxide as a result of hydrogen bonding of the chiral alcohol to the m-CPBA reagent. OH...
write major products for following reaction. (write only one
product unless it has both a 1,2 and a 1,4 product). when indicated
show mechanism and circle correct stereochemistry of the major
product. label examples of a kinetic and thermodynamic
product.
f. (E)-3-methyl-2-pentene + HBr with tr. peroxide **** Show Mechanism: th Major Product(s) of f. Stereochemistry of the product of the reaction described in f. (Circle one) a. R b. S c. E d. Z e. a mixture of E...
Can you explain how you came upon the answer also
1. Rank the following compounds in order of increasing stability (least to most stable). As you answer this question, think of why (give reasons) one molecule is more or less stable than another. 2. Predict the MAJOR product(s) for the reaction below. Pay close attention to stereochemistry. Provide a mechanism as to how you arrive with your answer. If your compound is chiral, indicate the configuration [(R) or (S)] of...
2-Bromo-2-methylbutane undergoes an E1 elimination reaction in
the presence of ethanol. In the next reaction only one of the
possible products is represented. Although the product shown is not
the major product of the reaction, notice that there is more than
one way it can be produced. Complete the mechanism and draw the
missing substances.
Draw all missing reactants and/or products in the appropriate
boxes by placing atoms on the grid and connecting them with bonds,
including charges where needed....
e See page 574 Complete the mechanism. All necessary atoms and bonds (that is, those that are involved in the mechanism) are drawn in for you already: do not modify the structures by adding or removing any atoms Solution Explanation See Hint See page 569 15 Question (4points) The alkyl chloride shown could be the result of treating different alkenes with HCI. In the box below, dravw all the alkenes that, when treated with HCI, will generate the product shown....
We begin with the surmise that the nucleophilic substitution reactions can occur only by one of two mechanisms: Sn1 solvolysis: three-step mechanism R-X slow, R® + to R® + ROH fast , ROM R' H. R-O + R'OH fast , ROR' + R- SN2: one-step mechanism R-X + Nuc slow, Nuc-R + x Begin by answering the three questions below. If you don't understand what's up, please ask! 1. Write out the rate law for the above Sn1 reaction and...
4) There are 3 different N atoms in the semicarbazide, and yet
only one of them is the site that does the nucleophilic attack. Why
is that N atom most reactive? Describe using structures.
Introduction Many reactions can take more than one course but the preferential formation of only one of the possible products may be attained by a judicial choice of the reaction conditions. In general, the 1 of 5 CHEM-2300 F19 Experiment 6 formation of a product is...
1. Consider the following two reactions, only one of which will
work as shown:
a) What is the stereochemical relationship between starting
material A and B?
b) Draw the mechanism for the reaction to convert the starting
material into the product. You can use either starting material A
or B to show the mechanism.
c) Draw the two chair forms for starting material A and circle
the more stable chair form. Explain why the one you circled is more
stable....
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