With the stereochemistry of the starting material shown, identify the stereochem

Question

With the stereochemistry of the starting material shown, identify the stereochemistry of 2-butanol in the following reaction sequence. A. (S)-2 butanol B. (R)-2-butanol C. racemic 2-butanol D. meso-2-butanol Which of the following gives the furthest downfield shift from TMS in its proton NMR spectrum? A) (CH_3)_4C B) (CH_3)_3N C) (CH_3)_3O D) CH_3F Which compound below fits the following proton NMR data? triplet delta 1.22 (3H) singlet delta 1.98 (3H) quartet delta 4.07 (2H) Which of the compounds below fit the following C-13 NMR? A. pare-dichlorobenzene C. ortho-dichlorobenzene B. meta-dichlorobenzene D. chlorobenzene Identify the C_4H_5CI isomer given the following proton NMR data: doublet delta 1.04 (6H) multiple delta 1.95 (1H) doublet delta 3.35 (2H) A) (CH_3)_3CCl B) CH_3CH_2CH_2CH_2Cl D) (CH_3)_2CHCH_2Cl

Explanation / Answer

Ans 24. B (R) -2 butanol

The formation of esters is reversible , so the esters can be converted into their corresponding alcohols and acids by base hydrolysis reaction . The reaction converts the specific enantiomer of one alcohol to its corrsponding mirror image. Hence the S ester gets hydrolysed into a R alcohol

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