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Need to know how to read each and determine the structure. Please list out step by step. ***Especially number 6 please

Unknowns for 1H NMR Final Report 4) Chemical Formula: CHO IR: strong broad peak at 3300cm PPM 5) Chemical Formula: CHUN IR: T
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Answer #1

Solution:

6) The given NMR spectrum confirms an ester:

C6H5 CH2-OCOCH2-CH3

A) IR explanation:

The presence of strong peak in IR at 1750 cm-1 confirms an ester.

B) NMR explanation:

> The presence of peak at 7.2 ppm due to 5H confirms the presence of monosubstituted benzene ring.

>> The presence of a singlet peak at 3.6 ppm due to 2H suggest that CH2 group is attached to benzene ring.

>> The triplet peak at 4.1 ppm due to 2H confirms that it is flanked between CH3 and C=O group

>> The triplet peak at 1.3 ppm due to 3H suggests terminal CH3 group.

Hence, molecular structure will be:

C6H5 CH2-O-COCH2CH3

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