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All results from a given calculation for CH2CH(CH3)2 (Isobutyl radical)

using model chemistry: B1B95/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 2A'
Energy calculated at B1B95/6-311G**
 hartrees
Energy at 0K-157.717892
Energy at 298.15K-157.726547
Nuclear repulsion energy126.823590
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B1B95/6-311G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3142 3016 19.94      
2 A 3121 2997 50.38      
3 A 3118 2994 55.22      
4 A 3043 2921 20.32      
5 A 2923 2806 31.02      
6 A 1504 1444 8.50      
7 A 1496 1436 8.80      
8 A 1455 1397 2.63      
9 A 1401 1346 4.96      
10 A 1311 1259 2.94      
11 A 1203 1155 0.80      
12 A 1081 1038 1.20      
13 A 987 948 1.51      
14 A 824 792 0.08      
15 A 524 503 29.69      
16 A 398 382 13.53      
17 A 346 332 0.48      
18 A 250 240 0.04      
19 A 3248 3118 17.68      
20 A 3119 2995 17.36      
21 A 3116 2991 5.88      
22 A 3040 2918 38.08      
23 A 1486 1426 2.78      
24 A 1481 1421 0.30      
25 A 1387 1332 6.65      
26 A 1319 1266 0.52      
27 A 1183 1136 0.35      
28 A 971 932 0.00      
29 A 936 898 0.82      
30 A 900 864 0.68      
31 A 360 346 0.20      
32 A 225 216 0.00      
33 A 141 135 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 25517.8 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 24499.6 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B1B95/6-311G**
ABC
0.28374 0.26613 0.15553

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.266 0.232 0.000
C2 0.857 1.203 0.000
H3 -1.211 0.803 0.000
H4 1.222 1.626 0.928
H5 1.222 1.626 -0.928
C6 -0.266 -0.630 -1.262
C7 -0.266 -0.630 1.262
H8 0.636 -1.244 -1.306
H9 -1.131 -1.296 -1.282
H10 -0.296 -0.012 -2.162
H11 0.636 -1.244 1.306
H12 -1.131 -1.296 1.282
H13 -0.296 -0.012 2.162

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 C6 C7 H8 H9 H10 H11 H12 H13
C11.48471.10442.24082.24081.52841.52842.16732.17432.17632.16732.17432.1763
C21.48472.10671.08321.08322.49262.49262.78183.44112.73512.78183.44112.7351
H31.10442.10672.73142.73142.13082.13083.05112.46152.48573.05112.46152.4857
H42.24081.08322.73141.85513.47882.72363.68364.35473.81282.95363.76902.5523
H52.24081.08322.73141.85512.72363.47882.95363.76902.55233.68364.35473.8128
C61.52842.49262.13083.47882.72362.52481.09251.09191.09192.79072.76923.4801
C71.52842.49262.13082.72363.47882.52482.79072.76923.48011.09251.09191.0919
H82.16732.78183.05113.68362.95361.09252.79071.76821.76602.61193.13473.7967
H92.17433.44112.46154.35473.76901.09192.76921.76821.76643.13472.56503.7700
H102.17632.73512.48573.81282.55231.09193.48011.76601.76643.79673.77004.3247
H112.16732.78183.05112.95363.68362.79071.09252.61193.13473.79671.76821.7660
H122.17433.44112.46153.76904.35472.76921.09193.13472.56503.77001.76821.7664
H132.17632.73512.48572.55233.81283.48011.09193.79673.77004.32471.76601.7664

picture of Isobutyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 120.724 C1 C2 H5 120.724
C1 C6 H8 110.470 C1 C6 H9 111.057
C1 C6 H10 111.219 C1 C7 H11 110.470
C1 C7 H12 111.057 C1 C7 H13 111.219
C2 C1 H3 108.010 C2 C1 C6 111.629
C2 C1 C7 111.629 H3 C1 C6 106.958
H3 C1 C7 106.958 H4 C2 H5 117.810
C6 C1 C7 111.372 H8 C6 H9 108.091
H8 C6 H10 107.900 H9 C6 H10 107.977
H11 C7 H12 108.091 H11 C7 H13 107.900
H12 C7 H13 107.977
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.256      
2 C -0.226      
3 H 0.146      
4 H 0.121      
5 H 0.121      
6 C -0.319      
7 C -0.319      
8 H 0.123      
9 H 0.120      
10 H 0.123      
11 H 0.123      
12 H 0.120      
13 H 0.123      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.294 0.008 0.000 0.294
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.034 0.297 0.000
y 0.297 -28.041 0.000
z 0.000 0.000 -27.350
Traceless
 xyz
x -0.338 0.297 0.000
y 0.297 -0.349 0.000
z 0.000 0.000 0.687
Polar
3z2-r21.374
x2-y20.007
xy0.297
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.563 0.717 0.000
y 0.717 6.884 0.000
z 0.000 0.000 7.343


<r2> (average value of r2) Å2
<r2> 94.097
(<r2>)1/2 9.700