Q. If (dl) or ( $\pm$ ) 2-methyl butanoic acid were esterified by reaction with (dl) or ( $\pm$ ) 2-butanol, how many optically active compounds would be present in the final equilibrium reaction mixture?
Alcohols Phenols and Ethers
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Solution:
$(dl) 2$-methyl butanoic acid and $(dl) 2$-butanol
Ester consists of two stereocentres. Chiral center during whole reaction are not effected, that's why all esters are optical active.
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