Look at each of the given compounds and determine if they would be a nucleophile only, an electrophile only, both, or neither for an aldol condensation. Compound A: electrophile only Compound B: nucleophile only Compound C: both an electrophile and a nucleophile Compound D: neither Compound E: both an electrophile and a nucleophile Compound F: nucleophile only多重下拉选择题
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Question textCalculations Let’s presume we wish to make the X=Cl derivatives. The original method for forming a molecule of this type was achieved for the parent benzaldehyde (X=H) by reacting with acetone. The following reagents/solvents and amounts were used. [table] Reagent / solvent | Amounts | Reagent | Amount Benzaldehyde | 0.625 mL | 4-Chlorobenzaldehyde | Answer 1 Question 4 g Acetone | 0.225 mL | Cyclopentanone | Answer 2 Question 4 mL Sodium hydroxide | 0.625 g | Cyclohexanone | Answer 3 Question 4 mL Ethanol | 7.5 mL | | Water | 7.5 mL | | Ethanol (to dissolve the aldehyde) | 2.5 mL | | [/table] Presuming the amounts of sodium hydroxide and the solvents remain constant, calculate the amount of 4-chlorobenzaldehyde needed in grams to ensure the number of moles of the aldehyde remains constant. Also calculate the required amounts for the alternate ketones cyclopentanone and cyclohexanone in millilitres (i.e. replacing acetone with these ketones but keeping the number of moles constant). All final answers should be to two decimal places. The density of acetone, cyclopentanone and cyclohexanone are 0.784g/mL, 0.950 g/mL and 0.948 g/mL respectively.
Technique questions Read the method section of the laboratory manual and complete the incomplete sections below. In this experiment, you will be working Blank 1 Question 2[select: , in groups of 2, in groups of 3, in groups of 4] and each of you will make Blank 2 Question 2[select: , one of the chlorinated derivatives, two of the chlorinated derivatives, three of the chlorinated derivatives] . Before addition, the round-bottomed flask will be charged with Blank 3 Question 2[select: , sodium hydroxide, water and ethanol, 4-chlorobenzaldehyde and the required ketone, 4-chlorobenzaldehyde, the required ketone and ethanol] . Before addition, the dropping funnel will be charged with Blank 4 Question 2[select: , 4-chlorobenzaldehyde, the required ketone and ethanol, sodium hydroxide and water, 4-chlorobenzaldehyde and ethanol] . 30 minutes after addition, the Blank 5 Question 2[select: , yellow, blue, green] product will be collected via filtration. The product will be analysed by Blank 6 Question 2[select: , NMR, UV and melting point, NMR, IR and melting point, NMR, GCMS and UV] .
Context and Introduction Read the introduction and compete the incomplete sections below. Dibenzalacetone derivatives can be used as active ingredients in Blank 1 Question 1[select: , sunscreens, shampoos, hair dyes] . Previous studies show that a Blank 2 Question 1[select: , cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl] core can enhance the favourable properties of these compounds. However, Blank 3 Question 1[select: , heat, sonication, expensive equipment] is required to form these structures. You have been tasked by Blank 4 Question 1[select: , an academic supervisor, an external company, your senior lab member] to investigate the use of a chlorine substituent on the synthesis of these molecules as this might Blank 5 Question 1[select: , allow formation at room temperature, use cheaper starting materials, be more safe] .
Context and Introduction Read the introduction and compete the incomplete sections below. Dibenzalacetone derivatives can be used as active ingredients in Blank 1 Question 1[select: , sunscreens, shampoos, hair dyes] . Previous studies show that a Blank 2 Question 1[select: , cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl] core can enhance the favourable properties of these compounds. However, Blank 3 Question 1[select: , heat, sonication, expensive equipment] is required to form these structures. You have been tasked by Blank 4 Question 1[select: , an academic supervisor, an external company, your senior lab member] to investigate the use of a chlorine substituent on the synthesis of these molecules as this might Blank 5 Question 1[select: , allow formation at room temperature, use cheaper starting materials, be more safe] .
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