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CHCl2-SiF3
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Chlorine |
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Nuclear
Quadrupole Coupling Constants |
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in Dichloromethyltrifluorosilane
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Calculation of the chlorine nqcc tensors in dichloromethyltrifluorosilane
was made on estimated ro molecular structure of Guirgis et al. [1].
These nqcc's are given Tables 1 - 3. Structure parameters are given in
Table 4. |
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In Tables 1 - 3,
subscripts a,b,c refer to the
principal axes of the inertia tensor; x,y,z to the principal axes
of the nqcc tensor. Øz,CCl (degrees) is the angle between the principal z-axis of the nqcc tensor and the CCl bond axis. ETA = (Xxx - Xyy)/Xzz. |
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RSD is the calibration residual standard deviation of
the B1LYP/TZV(3df,2p) model for calculation of the chlorine efg's/nqcc's. |
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Table 1. Chlorine
nqcc's in CH35Cl2-SiF3 (MHz). Calculation was made on the estimated ro structure of Guirgis et al. [1]. |
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Calc
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Expt
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35Cl |
Xaa |
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13.58 |
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Xbb |
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42.75 |
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Xcc |
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29.17 |
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Xab |
+/-
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43.70 |
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Xac |
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18.35 |
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Xbc |
-/+
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30.62 |
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RSD |
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0.49 (1.1 %) |
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Xxx |
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36.94 |
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Xyy |
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41.47 |
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Xzz |
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78.41 |
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ETA |
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0.058 |
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Øz,CCl |
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0.80
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Table 2. Chlorine
nqcc's in CH35Cl37Cl-SiF3 (MHz). Calculation was made on the estimated ro structure of Guirgis et al. [1]. |
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Calc
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Expt
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35Cl |
Xaa |
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16.45
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Xbb |
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45.61
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Xcc |
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29.16
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Xab |
+/-
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41.70
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Xac |
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17.31
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Xbc |
-/+
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31.24
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RSD |
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0.49 (1.1 %) |
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37Cl
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Xaa |
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8.33
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Xbb |
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31.34
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Xcc |
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23.01
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Xab |
+/-
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35.86
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Xac |
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15.26
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Xbc |
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23.62
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RSD
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0.44 (1.1 %) |
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Table 3. Chlorine
nqcc's in CH37Cl2-SiF3 (MHz). Calculation was made on the estimated ro structure of Guirgis et al. [1]. |
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Calc
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Expt
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37Cl |
Xaa |
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10.69
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Xbb |
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33.69 |
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Xcc |
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23.00 |
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Xab |
+/-
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34.45 |
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Xac |
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14.46 |
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Xbc |
-/+
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24.13 |
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RSD |
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0.49 (1.1 %) |
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Xxx |
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29.11 |
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Xyy |
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32.69 |
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Xzz |
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61.80 |
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ETA |
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0.058 |
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Øz,CCl |
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0.80
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Table 4. Dichloromethyltrifluorosilane. Molecular structure parameters, estimated ro (Å
and degrees). |
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Si
C 1 B1
H 2 B2 1 A1
Cl 2 B3 1 A2 3 D1
Cl 2 B4 1 A3 3 D2
F 1 B5 2 A4 3 D3
F 1 B6 2 A5 3 D4
F 1 B7 2 A6 3 D5
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B1 1.861
B2 1.090
B3 1.782
B4 1.782
B5 1.561
B6 1.565
B7 1.565
A1 111.3
A2 109.4
A3 109.4
A4 111.2
A5 109.9
A6 109.9
D1 -118.3
D2 118.3
D3 180.0
D4 -59.356228
D5 59.356228
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[1] G.A.Guirgis, S.S.Panikar, A.M.El Defrawy, V.F.Kalasinsky, J.R.Durig, J.Mol.Struct. 922,93(2009).
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CH2Cl-SiH3 |
CHCl2-SiH3 |
CH2Cl-SiF3 |
CHCl2-CH3
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Table of Contents |
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Molecules/Chlorine |
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CHCl2SiF3.html |
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Last
Modified 2 Feb 2014 |
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