Identification of Compound:Spectral Analysis

[challarao]

1. Organic compound having molecular formula C₂H₅O₂N shown IR frequencies-
3428(sharp peak),2917,1886,1793,3357(Broad peak),145,1184.
Identify the compound and the possible structure.



2. Table of frequencies of corresponding groups.



3. I have tried to identify the frequencies given above correspond to which functional groups and other properties as below.
O-H(3357)
N-H(3428)
2917-Characteristics of conjugation due to C-H stretching
C-O(1184)
I was unable to identify the other frequencies,and I am not able to construct the compound even I identify all the frequencies.
Please guide me ,and tell me also away to remember these frequencies.Because,in exams they just give us frequencies and expecting the compound.

 

[Nino MMP]

The compound with the given molecular formula is ethanolamine (C2H5O2N). The structure of ethanolamine is shown below: The IR frequencies that you have mentioned correspond to the following functional groups: O-H (3357 cm-1): Hydroxyl group (alcohol) N-H (3428 cm-1): Amine group 2917 cm-1: Characteristic of conjugation due to C-H stretching C-O (1184 cm-1): Ether group 1886 cm-1: C-N stretching 1793 cm-1: C-C stretching 145 cm-1: C-H out of plane bending To remember the IR frequencies corresponding to different functional groups, it is helpful to make an IR frequency chart. This chart should include the range of frequencies for each functional group, and also the most common frequencies for each group. This will help you to easily identify the functional groups present in a molecule when given the IR frequencies.