Homework Answers
Aldol condensation of benzaldehyde and acetone : The
reaction of an aldehyde with a ketone employing sodium hydroxide as
the base is an example of a mixed aldol condensation reaction.
Acetone has α-hydrogens (on
both
sides) and thus can be deprotonated to give a nucleophilic enolate
anion. The aldehyde carbonyl
is much more electrophilic than that of a ketone, and therefore
reacts rapidly with the enolate.
The alkoxide produced is protonated by solvent, giving a
β-hydroxyketone, which undergoes
base-catalyzed dehydration. The elimination process is particularly
fast in this case because the
alkene is stabilized by conjugation to not only the carbonyl but
also the benzene.
Is this right? NaOH H ? 1 eg 2 eq Ph Ph. Ph Ph Ph Ph...
Is this right?
NaOH H ? 1 eg 2 eq Ph Ph. Ph Ph Ph Ph 'Ph O A B С. D
(Ph)3P-CH2CH2CH3 CI NaOH iwia 2 eq. H2NCH2CH3 SOCl2, pyridine 1. (CH3CH2CH2)2Culi 2. H20 Conjugate addition Provide...
(Ph)3P-CH2CH2CH3 CI NaOH iwia 2 eq. H2NCH2CH3 SOCl2, pyridine 1. (CH3CH2CH2)2Culi 2. H20 Conjugate addition Provide a valid synthesis of the tertiary alcohol shown below, using any needed alkyl halide, carbonyl-containing compound, and organometallic reagent of your choice. Show each step of your synthesis and intermediates along the way. The disconnection approach to form "synthons" may be helpful. (12)
1 eq HBr 1eq Br2 1eq NBS hv KMnO4 heat Rh/C H2, moderate press.
1 eq HBr 1eq Br2 1eq NBS hv KMnO4 heat Rh/C H2, moderate press.
Table 4: Agglutination reactions for Rh 12 marks ons for Rh [2 marks S Reaction to...
Table 4: Agglutination reactions for Rh 12 marks ons for Rh [2 marks S Reaction to anti- Rh Rh Serum Mother present antigens Rh Type Douton Child 1 none Child 2 ador none Teaching Child 3 Rh reaction Answer the following questions: 0. Based on the results obtained explain the presence or absence of Rh antibodies in the mother prior to each pregnancy. [3 marks] 7. Is the mother right to be concerned about her third pregnancy? Explain. [2 marks]...
3. Predict the product(s): OSO,Ph KSCN, H2O Ph 1.1 eq. BnBuzNCI Acetone a. OTs = 0...
3. Predict the product(s): OSO,Ph KSCN, H2O Ph 1.1 eq. BnBuzNCI Acetone a. OTs = 0 - =BO
3. Predict the product(s): OSO,Ph KSCN, H2O Ph 1.1 eq. BnBuzNCI Acetone a. OTs = 0...
3. Predict the product(s): OSO,Ph KSCN, H2O Ph 1.1 eq. BnBuzNCI Acetone a. OTs = 0 - =BO
1. Calculation of pH. A weak acid HA (pKa = 4.85) reacted with strong base NaOH The reaction is HA + NAOH H20 + NaA...
1. Calculation of pH. A weak acid HA (pKa = 4.85) reacted with strong base NaOH The reaction is HA + NAOH H20 + NaA. There are 100 mL 0.100 M HA solution, and the concentration of Na OH is 0.100 M. 0 moles a. What is the pH when 0.00 mL of NaOH is added to the 100 mL HA solution? 2 x1 les b. What is the pH when 20.0 mL of NaOH is added to the 100...
Calculate the pka and ka given the pH. Please show ALL steps measured pH = cal,...
Calculate the pka and ka given the pH.
Please show ALL steps
measured pH = cal, pKa = q. I 0 pH1 after 5 drops of NaOH-14- pH after 5 drops of HCl = gng BE SURE TO GET T 3) Buffer System with 2 ml acid + 20 ml conjugate base [B]/ [HB] = 10 BE SURE TO GET THIS CORRECT!! (use "H+H" Eq. above to calculate pKa) measured pH- 450 pH after addition of XS NaOH-10.00 dition of...
23. Select the product for the reaction shown: NaOH Ph H,O, THE 5 °C H ?...
23. Select the product for the reaction shown: NaOH Ph H,O, THE 5 °C H ? o OH OH Ph Ph A Ph Ph B. D. 0
match the right reagent ОН 7 8 ОН г. . . . . . . +...
match the right reagent
ОН 7 8 ОН г. . . . . . . + enantiomer A.) PBrs B.) NBS, hv C.) D.) NaOH E.) NaNH2 F.) Br2 G.) HCI H.) Cl2, H2O 1.) HBO J.) H2 (1 eq), Pt K.) Na, NH3 L.) H2SO4, H20 M.)1. Hg(OAC)2 0.) N.) 1. mCPBA 2. H+, H2O 2. NaBH4 P.) 1. BH3 2. H2O2, NaOH
Is this right?
NaOH H ? 1 eg 2 eq Ph Ph. Ph Ph Ph Ph 'Ph O A B С. D
(Ph)3P-CH2CH2CH3 CI NaOH iwia 2 eq. H2NCH2CH3 SOCl2, pyridine 1. (CH3CH2CH2)2Culi 2. H20 Conjugate addition Provide a valid synthesis of the tertiary alcohol shown below, using any needed alkyl halide, carbonyl-containing compound, and organometallic reagent of your choice. Show each step of your synthesis and intermediates along the way. The disconnection approach to form "synthons" may be helpful. (12)
1 eq HBr 1eq Br2 1eq NBS hv KMnO4 heat Rh/C H2, moderate press.
Table 4: Agglutination reactions for Rh 12 marks ons for Rh [2 marks S Reaction to anti- Rh Rh Serum Mother present antigens Rh Type Douton Child 1 none Child 2 ador none Teaching Child 3 Rh reaction Answer the following questions: 0. Based on the results obtained explain the presence or absence of Rh antibodies in the mother prior to each pregnancy. [3 marks] 7. Is the mother right to be concerned about her third pregnancy? Explain. [2 marks]...
3. Predict the product(s): OSO,Ph KSCN, H2O Ph 1.1 eq. BnBuzNCI Acetone a. OTs = 0 - =BO
3. Predict the product(s): OSO,Ph KSCN, H2O Ph 1.1 eq. BnBuzNCI Acetone a. OTs = 0 - =BO
1. Calculation of pH. A weak acid HA (pKa = 4.85) reacted with strong base NaOH The reaction is HA + NAOH H20 + NaA. There are 100 mL 0.100 M HA solution, and the concentration of Na OH is 0.100 M. 0 moles a. What is the pH when 0.00 mL of NaOH is added to the 100 mL HA solution? 2 x1 les b. What is the pH when 20.0 mL of NaOH is added to the 100...
Calculate the pka and ka given the pH.
Please show ALL steps
measured pH = cal, pKa = q. I 0 pH1 after 5 drops of NaOH-14- pH after 5 drops of HCl = gng BE SURE TO GET T 3) Buffer System with 2 ml acid + 20 ml conjugate base [B]/ [HB] = 10 BE SURE TO GET THIS CORRECT!! (use "H+H" Eq. above to calculate pKa) measured pH- 450 pH after addition of XS NaOH-10.00 dition of...
23. Select the product for the reaction shown: NaOH Ph H,O, THE 5 °C H ? o OH OH Ph Ph A Ph Ph B. D. 0
match the right reagent
ОН 7 8 ОН г. . . . . . . + enantiomer A.) PBrs B.) NBS, hv C.) D.) NaOH E.) NaNH2 F.) Br2 G.) HCI H.) Cl2, H2O 1.) HBO J.) H2 (1 eq), Pt K.) Na, NH3 L.) H2SO4, H20 M.)1. Hg(OAC)2 0.) N.) 1. mCPBA 2. H+, H2O 2. NaBH4 P.) 1. BH3 2. H2O2, NaOH
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