option D is correct
Explanation: The alkoxide ion in this reaction is methoxide ion so the base used must be potassium methoxide.
3. Which base would you use for the following cross Claison Condensation? 1)? A. KOH B....
1. Which of the compounds listed below would produce
the following aldol condensation product?
2. Which is not a product of the claisen condensation
of ethyl ethanoate and ethyl butanoate?
3. A claisen-schmidt reaction shown below, is an
important step in the commercial synthesis of Vitamin A: what type
of reaction is the claisen- Schmidt?
4. Which of the following statements is true about the
anion formed from the reaction of diethyl malonate with sodium
ethoxide?
please help
A. cycloh...
Which of the following pairs of compounds would give the most successful crossed aldol condensation when combined in the presence of a strong base? (Note: by "successful" we mean that the reaction 1) actually works, and 2) gives only a single aldol condensation product.) Pair A: and Bu Ph H н Pair B: and Ph н н Pair C: and OMe Ph and Pair D: Pair C Pair A Pair D Pair B
8. Which one of the following substances is not a base? a) KOH b) Ca(ОН)2 c) NH3 d) HNO3 e) Cl 9. Which of the following species is NOT soluble? (a) Na2S (b) Рb(ОН)2 (c) KNO3 (d) KCl (e) (NH4)2CO3 10. Which of the following is a weak acid? a) HBr b) HCl c) NH3 d) HCIO4 e) HF
Explain why for condensation reactions occurring at the α-carbon you often use a weak base (like -OH) to create the enolate when for reactions such as halogenation you would use a strong base (like LDA). Under what conditions (give an example) could you use LDA for a condensation reaction? Explain as in-depth as possible and I will give you a thumbs up! Thanks :)
Which of the following is the acid-base combination that cannot use phenolphthalein as an acid-base indicator? Select one: a. HBr and NH3 b. HF and KOH C. CH2COOH and NaOH d. HCI and LiOH
ead use ofT biodlesel fuel using this synthetic method. Prelab 1 Caicuiate the molar mass of potassium hydroxide, KOH 2. Approximately 5.9 g of KOH is needed to catalyze the transesterification process for 1L of oil to biodiesel. Calculate the mass of KOH needed to convert 100 mL of oil to biodiesei. 3. Convert the mass of KOH determined in (2) above to moles. 4. What volume of methanol needs to be added to this many moles of KOH to...
In the table below, which of the following cross results (A, B, C, or D) would most closely conform to the results from a test cross of a dihybrid plant? Tall purple Tall white Short white Short purple A 100 300 300 900 B 250 500 400 300 C 900 100 300 300 D 360 375 340 350 Cross result A Cross results B … … Is the ratio a 1:1:1:1 or a 9:3:3:1 ratio?
Consider the following crossed aldol condensation. Which statement explains why a single cross condensation product is formed? 2,2-dimethylcyclohexanone "CH₃ H₂C, CH, H NaOCH.CH H3C thanol benzaldehyde 2,2-Dimethylcyclohexanone has only one alpha carbon which can form an enolate. Benzaldehyde has no hydrogens attached to the alpha carbon which eliminates the self-condenstation reaction. 2,2-Dimethylcyclohexanone is sterically hindered which limits the self-condenstation reaction. All of the above
Which of the following correctly reflects relative stabilities of carbocations? 3 degree allylic > 2 degree > 1 degree benzylic methyl > 2 degree benzylic > 3 degree 3 degree benzylic > vinyl >1 degree 2 degree allylic > 2 degree > vinyl 1 degree benzylic > 3 degree > 3 degree allylic Dehydrohalogenation of 2-bromobutane in the presence of a strong base proceeds via which of the following mechanistic pathways? S_N1 S_N2 E1 E2 none of the above Which...
1. Which is a stronger base ethanol (CH3CH2OH) or ethoxide anion (CH3CH2O-ve) and why. 2. Rank the following bases from strongest to weakest and explain why you put the bases in that order. a) diisopropyl amide b) ethanethiolate c) ethoxide anion d) tert-butoxide anion