Please Can this infrared spectrum analyze, identify and show which functional gr

Question

Please Can this infrared spectrum analyze, identify and show which functional group in there. Also show which bands were used to verify the presence of particular structural feature and how compound with similar feature were excluded from consideration. It is a unknown compound. Below is all compound to determine which one of them is the unknown in the spectral data sheet. %Transmittance 8 8 8 3063.70 8 2818.72 2736.81 8 8 1696.64 1596.37 1583.22 8 1455 37 1390.47 1319267 48 1201.76 1166.38 1109.95 1023 39 1000.66 923.44 8 826.52 742.51 712.97 685.79 648.11 546.34 450.48 415.49

Explanation / Answer

a PEAK AT 1696 clearly indicates the presence of carbonyl group.

So only three structure are possible.

acetophenone

cyclohexanone

benzaldehyde

now lets find which one of this is correct

acetophenone and cyclohexanone are both ketones

but benzaldehyde is an aldehyde.

all aldehydes shows C-H strech at 2820-2850 & 2720-2750

with regular C=O strech.in spectrum we can see that

there are peaks around 2700 and 2800 cm-1. these belong to

aldehydic C-H strech. Peak of 3000 and above are of aomatic ring C-H strech.

So benzaldehyde is correct option

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---