Click on any peak for help in interpreting this spectrum.
The peak is a septet, area 1, indicating that it corresponds to a CH adjacent to 6 identical hydrogens (two identical CH3 groups). The chemical shift (d 3.9) suggests that the CH is adjacent to an electron-withdrawing group, such as an oxygen.
The peak is a singlet, area 1, indicating that it corresponds to an isolated hydrogen (CH or OH). The chemical shift (d 3.1) suggests that the hydrogen is adjacent to an electronegative atom (i.e., oxygen).
The peak is a doublet, area 6, indicating that it corresponds to six identical hydrogens (two CH3 groups) adjacent to one hydrogen. The chemical shift (d 1.2) is in the "simple alkane" region.
The peak is a quartet, indicating that it corresponds to a methyl group. The chemical shift (d 26) is in the "simple alkane" region.
The peak is a doublet, indicating that it corresponds to a CH. The chemical shift (d 65) suggests that the CH is adjacent to an electron-withdrawing group, such as an oxygen, and may be further shifted due to steric effects.
The peak is a triplet, indicating that it corresponds to a CH2. The chemical shift (d 80) suggests that the CH2 is adjacent to an electron-withdrawing group, such as an oxygen, and may be further shifted due to steric effects.
The spectrum seems to be consistent with a simple aliphatic alcohol.
From the molecular formula, the compound has "no degrees of unsaturation" (no double bonds, carbonyls or rings).
The 13C spectrum contains two peaks; a doublet at d 65 and a quartet at d 26. The quartet most likely represents a relatively simple methyl group, bonded to a carbon, and the doublet most likely represents a CH bonded to an electronegative atom, such as oxygen.
3400 cm-1:
strong OH or NH present
3100 cm-1:
no peak to suggest sp2 CH 2900 cm-1:
strong peak indicating sp3 CH
2200 cm-1:
no unsymmetrical triple bonds 1710 cm-1:
no carbonyl absorbance
1610 cm-1:
no peak to suggest C=C
Click on any numbered peak for help in interpreting this spectrum.
The peak occurs at m/e = 45, and it is the base peak in this spectrum (the most intense peak). The molecular weight, m/e = 45, is a common fragment seen in alcohols (loss of an alkyl group to form R=COH.+, where R = CH3).
The peak occurs at m/e = 59, making this peak m-1 (loss of a hydrogen). Loss of a m/e = 1 is often seen in compounds with acidic hydrogens.
The peak occurs at m/e = 73, making this peak m-15 (loss of a methyl group).
The peak occurs at m/e = 87, making this peak m-1 (loss of a hydrogen). Loss of a m/e = 1 is often seen in compounds with acidic hydrogens.
The peak occurs at m/e = 88, which is the molecular weight of the compound, making this the molecular ion (m.+).
The mass spectrum consists of a m-1 peak at 59 (the MW is 60.1), and a base peak at m-15 (m/e = 45) which is consistent with loss of a CH3 group. The spectrum is consistent with a molecule having a single labile hydrogen (-OH, -CHO, etc.) which can lose a methyl group to form a stable cation.
C3H8O: MW = 60.1
