The Claisen condensation first forms an ion which undergoes a to give the beta-ketoester. This product immediately undergoes an acid base reaction because it's pKa is about which is favored over the ester who's pKa is about . 多项填空题

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Assign each of these statements as True or False. True Intramolecular Claisen condensations prefer 5 or 6 member rings. False Using a ketone as an enolate in a Claisen condensation gives a beta-diester. True Claisen condensations require 1 or more alpha H to form an enolate ion nucleophile to give a good yield. True The product of a Claisen condensation is more acidic than the starting material.

Which of these could be a nucleophile for a Claisen Condensation? (select all that apply)

The Claisen condensation is analogous to the reaction of aldehydes but with esters.

A 62.9 kg lady is standing on a weighing scale in an elevator as shown in the diagram below. Assume gravitational acceleration = 15 ms-2 Given that the elevator is accelerating upwards at 3.7 ms-2 , determine the magnitude of the normal force on the lady.

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