2.5 Mass Spectrometry
49
Mass Formula
Compound type
36 HCl
chloro compounds
H 2 O + H 2 O
dihydroxy compounds
41 CH 3 CN
methyl-substituted N-heteroaromatics
42 C 3 H 6
O- and N-propyl compounds
CH 2 C=O
acetyl compounds, ethyl ketones
CN 2 H 2
N-heteroaromatics, diamines, guanidines
43 C 3 H 7
·
isopropyl derivatives
C 2 H 5 N
secondary N-methyl amines, piperazines
CONH
cyclic amides, carbamates
44 CO 2
anhydrides, aromatic carboxylic acids, carbamates
CH 3 CHO
N–CH 2 CH 2 OH derivatives
45 H 2 O + HCN
(CH 3 ) 2 NH
aliphatic dimethyl amines
CH 3 CH 2 NH 2
N-ethyl amines, piperidines
46 C 2 H 5 OH
ethyl ethers, ethyl esters
H 2 O + CO
aliphatic carboxylic acids, amino acids
NO 2
·
aromatic nitro compounds
47 HNO 2
aromatic nitro compounds
CH 3 S ·
aromatic methyl thioethers
48 CH 3 SH
thioethers
SO
aromatic sulfonyl compounds
50 CH 3 Cl
CF 2
trifluoromethyl derivatives
54 C 4 H 6
56 C 4 H 8
O- and N-butyl compounds
57 C 3 H 7 N
aliphatic N-ethyl-N-methy groups, N-methylpiperazines
C 2 H 3 NO
N-methyl carbamates, glycyl
58 NO · + CO
aromatic nitro compounds
59 C 3 H 7 NH 2
N-propyl- and N-isopropyl derivatives
60 C 3 H 7 OH
propyl ethers and propyl esters
C 3 H 6 + H 2 O
CH 3 COOH
acetic acid esters
CH 2 C=O + H 2 O
61 CO 2 + NH 3
amino acids
64 SO 2
sulfones, sulfonic acids, sulfonates
S 2
disulfides
66 SO 2 + H 2
sulfonamides
68 C 4 H 4 O
cyclohexanones
C 3 H 4 N 2
imidazoles