NMR lab Give structures for the compounds below that show one PMR signal each. C

Question

NMR lab Give structures for the compounds below that show one PMR signal each. C2H60 C2H40 CAO& C, H6 C4H603 C3H60 Give structures for the following compounds that show two PMR sin glets each. C2H402 C8H10 C5HnCI C, H602 C7HI5CI C^O, How would you distinguish between the following compounds usii PMR spectroscopy? methyl benzoate and phenylacetic acid phenylacetic acid and/Mnethylbenzoic acid/-butyl alcohol and sec-butyl alcohol o-xylene and p-xylene methyl propionate and ethyl acetate Draw approximate PMR spectra expected for the following: methyl acetoacetate 1,4-dimethoxybenzene deuteropropanal CH3COCHXHXOCH3.

Explanation / Answer

Question 1)

Answer )

QUESTION 2)

ANSWER

QUESTION 3)

ANSWER )

In methyl benzoate ester proton (-OCH3) shows singlet while in phenyl acetic acid benzylic (-CH2) shows singlet and acidic proton (-COOH) appear

b) PHENYL ACETIC ACID and p-METHYL BENZOIC ACID

In PHENYL ACETIC ACID (-COOH) acidic proton, 5H aromatic proton ,2H benzylic while in p-METHYL BENZOIC ACID (-COOH) acidic proton,3H (-CH3) singlet,4H aromatic proton

In T BUTYL ALCOHOL 9H shows singlet ,and 1H alcoholic proton while in sec BUTYL ALCOHOL (-CH3) shows singlet,2H (-CH2) quartet and (-CH3) shows triplet

In O-XYLENE 6H singlet ,2H doublet ofdoublet,2H doublet and in P-XYLENE 6H singlet,4H aromatic shows doublet

In ETHYL PROPIONATE (-OCH3)shows singlet,(-CH2) shows quartet, ,(-CH3) shows triplet while in the ETHYL ACETATE (-COCH3)shows singlet,(-OCH2) shows quartet, ,(-CH3) shows triplet

QUESTION 4)

ANSWER )

(-CO-CH3) shows SINGLET 3H, (-CO-CH2-CO) shows SINGLET 2H, (-O-CH2) shows QUARTET 2H, (-CH3) shows TRIPLET 3H

                    b) 1,4 dimethoxy benzene

                           (-O-CH3) SINGLET 6H,aromatic 4H doublet

                    c) 3- DUETERO PROPANAL CH3-CH2-CH2-OD

        (-CH3)shows TRIPLET FOR 3H,(-CH2) shows MULTIPLATE FOR 2H, (-OCH2) shows TRIPLET        FOR 2H ,

                     d) CH3-CO-CH2-CH2-CO-CH3

                         (CH3-CO-) shows singlet for 6H,(- CH2-CO) shows triplet for 4H

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