Which of the following is a true statement ab | vedclass

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(D) The reaction is the Kolbe-Schmitt reaction. When $PhONa$ is used,the $Na^{\oplus}$ cation is small and coordinates with both the phenoxide oxygen

Vedclass · Accepted Answer

All of these.

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(D) The reaction is the Kolbe-Schmitt reaction. When $PhONa$ is used,the $Na^{\oplus}$ cation is small and coordinates with both the phenoxide oxygen and the incoming $CO_2$,stabilizing the ortho-transition state via chelation,making the ortho-isomer the major product. When $PhOK$ is used,the $K^{\oplus}$ cation is larger and less effective at chelation,which reduces the preference for the ortho-position and makes the para-isomer more competitive. The product formed (salicylic acid) is a key intermediate in the synthesis of aspirin (acetylsalicylic acid). Therefore,all the given statements are true.

Which of the following is a true statement about the reaction shown?

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