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CHCl2-SiH3
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Chlorine |
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Nuclear
Quadrupole Coupling Constants |
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in Dichloromethylsilane
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Calculation of the chlorine nqcc tensors in dichloromethylsilane
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-SiH3 (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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12.71 |
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Xbb |
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40.75 |
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Xcc |
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28.04 |
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Xab |
+/-
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42.66 |
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Xac |
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17.62 |
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Xbc |
-/+
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28.84 |
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RSD |
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0.49 (1.1 %) |
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Xxx |
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35.75 |
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Xyy |
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39.64 |
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Xzz |
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75.39 |
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ETA |
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0.052 |
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Øz,CCl |
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0.64
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Table 2. Chlorine
nqcc's in CH35Cl37Cl-SiH3 (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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10.58
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Xbb |
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38.56
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Xcc |
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27.98
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Xab |
+/-
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43.91
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Xac |
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15.86
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Xbc |
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29.93
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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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50.74
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Xbb |
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28.56
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Xcc |
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22.18
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Xab |
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2.30
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Xac |
-/+
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26.52
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Xbc |
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0.38
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RSD
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0.44 (1.1 %) |
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Table 3. Chlorine
nqcc's in CH37Cl2-SiH3 (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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32.12
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Xbb |
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9.98
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Xcc |
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22.14 |
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Xab |
+/-
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33.66 |
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Xac |
-/+
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22.67 |
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Xbc |
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13.87 |
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RSD |
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0.49 (1.1 %) |
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Xxx |
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28.17 |
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Xyy |
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31.24 |
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Xzz |
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59.42 |
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ETA |
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0.052 |
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Øz,CCl |
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0.64
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Table 4. Dichloromethylsilane. Molecular structure parameters, estimated ro [1] (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
H 1 B5 2 A4 3 D3
H 1 B6 2 A5 3 D4
H 1 B7 2 A6 3 D5
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B1 1.900
B2 1.093
B3 1.783
B4 1.783
B5 1.477
B6 1.480
B7 1.480
A1 112.2
A2 110.2
A3 110.2
A4 108.0
A5 108.0
A6 108.0
D1 -118.3
D2 118.3
D3 180.0
D4 -59.82
D5 59.82
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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-SiF3 |
CH2Cl-SiF3 |
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Table of Contents |
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Molecules/Chlorine |
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CHCl2SiH3.html |
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Last
Modified 2 Feb 2014 |
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