Where in the IR spectrum would you expect the following molecule to absorb? ball

Question

Where in the IR spectrum would you expect the following molecule to absorb? ball & stickabels 1. Do not list alkane absorptions. 2. Take frequencies from the table below. Enter frequency ranges identically to how they appear in the table. 3. Enter zero in any unused answer box Functional Group Alkene =C-H Alkene C-C Arene C-H Absorption (cm-1) Intensity Functional Group 3020-3100 1640-1680 3030 1660-2000 Medium Alcohol O-H MediumAlcohol C-O WeakCarboxylic acid 0-H Weak Medium Carboxylic acid C=O Absorption (cmIntensity 3400-3650 1050-1150 2500-3100 1710 Medium, broad Medium Strong, broad Arene C-OC 1450-1600 Strong Alkyne C-H Alkyne C Nitrile C Alkyl halide C-C Alkyl halide C-Br AmineN-H Amine C-N 1735 Strong Strong Strong Strong Weak Strong Strong Strong Ester C-O Medium Ester sp- C-O 3300 2100-2260 2210-2260 600-800 Medium Ester sp c-o Strong Aldehyde Co Strong Aldehyde C-iH Medium Ketone C=O MediumAmide C-O 1200-1250 1000-1100 1730 2720 1715 1690 500-600 3300-3500 1030-1230 AmideN-H Nitro 1540 Strong1° amides hae 2 N-H stretches. 3200,3400 Medium 2 amides have 1 N-H stretch. Expected absorption frequencies, or frequency ranges, are:

Explanation / Answer

in this compound C=O bond, C(triple bond)C and spC-H bond.

alkyne C-H bond frequency is 3300 cem-1.

C(triple bond)C bond frequency range is 2100-2260 cem-1.

Ketone C=O bond frequency 1715 cem-1.

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