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

using model chemistry: B1B95/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 2A'
Energy calculated at B1B95/6-31G**
 hartrees
Energy at 0K-157.686779
Energy at 298.15K-157.695426
Nuclear repulsion energy126.687218
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 B1B95/6-31G**
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 3164 3021 18.77      
2 A 3144 3002 49.18      
3 A 3143 3001 46.18      
4 A 3060 2922 18.19      
5 A 2939 2806 31.40      
6 A 1517 1449 6.56      
7 A 1508 1440 6.04      
8 A 1471 1404 1.41      
9 A 1415 1351 2.84      
10 A 1319 1260 3.79      
11 A 1208 1154 0.75      
12 A 1086 1037 1.40      
13 A 993 948 1.94      
14 A 828 791 0.08      
15 A 511 488 23.30      
16 A 394 376 14.97      
17 A 347 331 0.61      
18 A 255 243 0.07      
19 A 3271 3124 17.39      
20 A 3143 3001 14.29      
21 A 3141 2999 6.13      
22 A 3057 2919 35.75      
23 A 1498 1430 2.19      
24 A 1493 1425 0.36      
25 A 1400 1337 4.17      
26 A 1328 1268 0.93      
27 A 1188 1135 0.19      
28 A 975 931 0.01      
29 A 941 898 0.95      
30 A 905 864 0.82      
31 A 361 344 0.17      
32 A 229 219 0.00      
33 A 146 139 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 25687.9 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 24526.8 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 B1B95/6-31G**
ABC
0.28304 0.26567 0.15523

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.267 0.233 0.000
C2 0.860 1.203 0.000
H3 -1.214 0.804 0.000
H4 1.226 1.628 0.928
H5 1.226 1.628 -0.928
C6 -0.267 -0.630 -1.263
C7 -0.267 -0.630 1.263
H8 0.634 -1.247 -1.306
H9 -1.134 -1.295 -1.285
H10 -0.293 -0.013 -2.165
H11 0.634 -1.247 1.306
H12 -1.134 -1.295 1.285
H13 -0.293 -0.013 2.165

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 C6 C7 H8 H9 H10 H11 H12 H13
C11.48691.10582.24442.24441.52971.52972.17012.17692.17872.17012.17692.1787
C21.48692.11171.08461.08462.49502.49502.78553.44512.73732.78553.44512.7373
H31.10582.11172.73732.73732.13272.13273.05452.46282.49003.05452.46282.4900
H42.24441.08462.73731.85643.48282.72773.68904.36073.81652.95983.77412.5551
H52.24441.08462.73731.85642.72773.48282.95983.77412.55513.68904.36073.8165
C61.52972.49502.13273.48282.72772.52631.09351.09311.09312.79192.77293.4832
C71.52972.49502.13272.72773.48282.52632.79192.77293.48321.09351.09311.0931
H82.17012.78553.05453.68902.95981.09352.79191.76961.76722.61203.13783.7989
H92.17693.44512.46284.36073.77411.09312.77291.76961.76803.13782.57073.7757
H102.17872.73732.49003.81652.55511.09313.48321.76721.76803.79893.77574.3295
H112.17012.78553.05452.95983.68902.79191.09352.61203.13783.79891.76961.7672
H122.17693.44512.46283.77414.36072.77291.09313.13782.57073.77571.76961.7680
H132.17872.73732.49002.55513.81653.48321.09313.79893.77574.32951.76721.7680

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 120.771 C1 C2 H5 120.771
C1 C6 H8 110.531 C1 C6 H9 111.100
C1 C6 H10 111.247 C1 C7 H11 110.531
C1 C7 H12 111.100 C1 C7 H13 111.247
C2 C1 H3 108.173 C2 C1 C6 111.591
C2 C1 C7 111.591 H3 C1 C6 106.941
H3 C1 C7 106.941 H4 C2 H5 117.689
C6 C1 C7 111.329 H8 C6 H9 108.048
H8 C6 H10 107.839 H9 C6 H10 107.941
H11 C7 H12 108.048 H11 C7 H13 107.839
H12 C7 H13 107.941
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.118      
2 C -0.237      
3 H 0.126      
4 H 0.110      
5 H 0.110      
6 C -0.351      
7 C -0.351      
8 H 0.122      
9 H 0.115      
10 H 0.117      
11 H 0.122      
12 H 0.115      
13 H 0.117      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.251 -0.009 0.000 0.251
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.484 0.274 0.000
y 0.274 -27.482 0.000
z 0.000 0.000 -26.843
Traceless
 xyz
x -0.321 0.274 0.000
y 0.274 -0.319 0.000
z 0.000 0.000 0.640
Polar
3z2-r21.280
x2-y2-0.002
xy0.274
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.993 0.771 0.000
y 0.771 6.214 0.000
z 0.000 0.000 6.757


<r2> (average value of r2) Å2
<r2> 93.923
(<r2>)1/2 9.691