Click on any peak for help in interpreting this spectrum.
This group consists of two doublets, area 4, indicating two CH groups adjacent to non-equivalent CH groups. The chemical shift is in the aromatic region, and the splitting pattern strongly suggests 1,4-disubstitution.
The peak is a singlet, area 2, indicating that it corresponds to an isolated CH2. The chemical shift (d 4.7) suggests that the CH2 is adjacent to one or more electronegative atoms or groups (i.e., oxygen).
The peak is a singlet, area 3, indicating that it corresponds to an isolated CH3. The chemical shift (d 3.6) suggests that the CH3 is adjacent to an electronegative atom (i.e., oxygen).
The peak is a singlet, area 1, indicating that it corresponds to an isolated hydrogen (a CH or OH) not adjacent to another hydrogen. The chemical shift (d 2.6) suggests the hydrogen is adjacent to an electronegative atom.
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 triplet, indicating that it corresponds to a methylene group. The chemical shift (d 71) suggests the carbon is adjacent to one or more electronegative groups.
These peaks are in the aromatic region of the spectrum. The fact that there are four peaks for the six aromatic carbons requires symmetry in the molecule. The fact that two doublets and two singlets are observed strongly suggests 1,4-disubstitution.
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 an aromatic alcohol.
From the molecular formula, the compound has "four degrees of unsaturation" (four double bonds, carbonyls or rings).
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Structure:
The 13C spectrum contains six peaks, indicating that the molecule has some elements of symmetry. The quartet at d 56 and the triplet at d 71 represent a CH3 and a CH2 group which are deshielded by electronegative atoms (most likely oxygen); the peaks at d 161 - 128 are in the aromatic region; the fact that two doublets and two singlets are observed strongly suggests 1,4-disubstitution.
3400 cm-1:
strong OH or NH present
3100 cm-1:
weak peak suggesting 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:
several peaks suggesting Ar C=C
Click on any numbered peak for help in interpreting this spectrum.
The peak occurs at m/e = 121, and it represents m-17 (commonly loss of OH).
The peak occurs at m/e = 137, 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 = 138, which is the molecular weight of the compound, making this the molecular ion (m.+). It is also the base peak in the spectrum.
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 molecular ion at 138, which is also the base peak, an m-1 peak at 137, indicating the presence of a labile hydrogen (OH or CHO), and an m-17 peak (loss of HO-). The spectrum is consistent with an alcohol which cannot readily break down to form other stable cations.
C8H10O2; MW = 138.17
The proton NMR has two doublets at d 6.9, consistent with aromatic 1,4-disubstitution, and three singlets, areas 3, 2 and 1. The singlets at d 3.6 and 4.7 are highly shifted and suggest isolated CH3 and CH2 groups adjacent to one or more electronegative atoms or groups. The singlet, area 1, would be consistent with an alcohol.
IUPAC Name: 4-methoxyphenyl methanol
13C NMR: 
MS: 