Compare the relative acidity of the hydrogens in bold. Which of the following st

Question

Compare the relative acidity of the hydrogens in bold. Which of the following statements is true about molecules 1, 2, and 3?1 is the most acidic because the bulky isopropyl groups stabilize a negative charge on the nitrogen in the conjugate base. 1 is the most acidic because nitrogen is the least electronegative element and is therefore less attracted to the hydrogen. 2 is the most acidic because oxygen is the most electronegative element and can therefore stabilize a negative charge in the conjugate base. 3 is the most acidic because it is the least sterically hindered. 3 is the most acidic because sulfur is a bigger atom and can therefore stabilize the negative charge in the conjugate base. It is impossible to know which molecule is more acidic without a pK_a chart.

Explanation / Answer

only 5 is correct

because of bigger in size it can stabilise the -ve charge

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