CH3Br, Mass analysis for Br containing mass peaks
agust, heima, ...CH3Br/PD for Br_CH3BR on 16505-100809vhwak.pxp
Agust,www,....ch3br/PPT-100809ak.ppt
-10
-15
x10
3
-20
They ar not tails, all these peaks
can not removed.
They could be something else.
-25
-30
50
100
150
pnt
200
-10
-15
79Br+
H3C81Br+
81Br+
x10
3
-20
Assumption I:
H2C81Br+
They ar not tails, all these peaks
can not removed.
They could be something else.
-25
H3C79Br+/
HC81Br+
C79Br+
-30
HC79Br+
50
100
150
H2C79Br+/
C81Br+
pnt
200
Assumption I:
M+
Mw
pnt
79Br+
79
47.4
81
61.5
C79Br+
91
129.2
HC79Br+
92
136.3
H2C79Br+/ C81Br+
93
142.4
H3C79Br+/HC81Br+
94
149.3
------------/H2C81Br+
95
155.6
------------/H3C81Br+
96
162
------------/
81Br+
160
pnt
140
Assumption I:
Coefficient values ± one standard deviation
a
= -1072.7 ± 1.92
b
= 126.02 ± 0.203
120
100
Very good fit!
80
60
9.0
9.2
9.4
9.6
Sqrt(Mw)
-10
-15
79Br+
??
81Br+
x10
3
-20
Assumption II:
They ar not tails, all these peaks
can not removed.
They could be something else.
-25
H3C79Br+
H3C81Br+
-30
50
100
150
pnt
200
Assumption II:
M+
Mw
pnt
79Br+
79
47.4
81
61.5
H3C79Br+
94
129.2
------------/H3C81Br+
96
142.4
------------/
81Br+
Assumption II:
140
pnt
Coefficient values ± one standard deviation
a
= -856.4 ± 22.5
b
= 101.82 ± 2.41
120
100
80
Much worse fit than for assumption I
CONCLUSION: assumtion I holds,
60
i.e.:
9.0
9.2
9.4
9.6
Sqrt(Mw)
-10
Conclusion concerning mass
assignment for (2+n)REMPI of CH3Br:
-15
79Br+
H3C81Br+
81Br+
x10
3
-20
H2C81Br+
They ar not tails, all these peaks
can not removed.
They could be something else.
-25
H3C79Br+/
HC81Br+
C79Br+
-30
HC79Br+
50
100
150
H2C79Br+/
C81Br+
pnt
200