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

using model chemistry: B3PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 2A'
Energy calculated at B3PW91/6-31G**
 hartrees
Energy at 0K-157.741517
Energy at 298.15K-157.750196
Nuclear repulsion energy126.349432
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 B3PW91/6-31G**
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 3160 3029 18.64      
2 A 3132 3001 53.82      
3 A 3129 2999 45.86      
4 A 3048 2922 18.23      
5 A 2933 2811 33.41      
6 A 1520 1457 7.09      
7 A 1510 1447 5.39      
8 A 1475 1414 1.67      
9 A 1418 1359 3.16      
10 A 1324 1269 4.21      
11 A 1210 1159 1.05      
12 A 1092 1046 1.52      
13 A 993 952 1.84      
14 A 825 790 0.07      
15 A 520 499 23.79      
16 A 403 386 14.66      
17 A 356 342 0.55      
18 A 263 252 0.09      
19 A 3265 3130 17.43      
20 A 3129 2998 16.30      
21 A 3126 2996 4.96      
22 A 3045 2918 36.69      
23 A 1499 1437 2.25      
24 A 1496 1434 0.38      
25 A 1403 1344 4.48      
26 A 1333 1277 1.08      
27 A 1189 1139 0.33      
28 A 975 934 0.01      
29 A 945 906 0.97      
30 A 909 871 0.88      
31 A 371 356 0.11      
32 A 237 227 0.00      
33 A 128 122 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 25680.1 cm-1
Scaled (by 0.9584) Zero Point Vibrational Energy (zpe) 24611.8 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 B3PW91/6-31G**
ABC
0.28141 0.26414 0.15429

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.354 0.000
C2 1.477 0.140 0.000
H3 -0.190 1.446 0.000
H4 2.040 0.142 0.929
H5 2.040 0.142 -0.929
C6 -0.653 -0.212 -1.267
C7 -0.653 -0.212 1.267
H8 -0.525 -1.299 -1.316
H9 -1.726 0.004 -1.288
H10 -0.206 0.218 -2.170
H11 -0.525 -1.299 1.316
H12 -1.726 0.004 1.288
H13 -0.206 0.218 2.170

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 C6 C7 H8 H9 H10 H11 H12 H13
C11.49201.10742.25112.25111.53381.53382.17732.18232.18372.17732.18232.1837
C21.49202.11661.08611.08612.50272.50272.79443.45482.74672.79443.45482.7467
H31.10742.11662.74432.74432.13712.13713.06212.46962.49303.06212.46962.4930
H42.25111.08612.74431.85763.49232.73653.70024.37213.82732.96703.78542.5666
H52.25111.08612.74431.85762.73653.49232.96703.78542.56663.70024.37213.8273
C61.53382.50272.13713.49232.73652.53401.09571.09511.09512.80502.78003.4922
C71.53382.50272.13712.73653.49232.53402.80502.78003.49221.09571.09511.0951
H82.17732.79443.06213.70022.96701.09572.80501.77241.76992.63123.14973.8145
H92.18233.45482.46964.37213.78541.09512.78001.77241.77033.14972.57653.7835
H102.18372.74672.49303.82732.56661.09513.49221.76991.77033.81453.78354.3394
H112.17732.79443.06212.96703.70022.80501.09572.63123.14973.81451.77241.7699
H122.18233.45482.46963.78544.37212.78001.09513.14972.57653.78351.77241.7703
H132.18372.74672.49302.56663.82733.49221.09513.81453.78354.33941.76991.7703

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 120.848 C1 C2 H5 120.848
C1 C6 H8 110.695 C1 C6 H9 111.128
C1 C6 H10 111.237 C1 C7 H11 110.695
C1 C7 H12 111.128 C1 C7 H13 111.237
C2 C1 H3 108.115 C2 C1 C6 111.607
C2 C1 C7 111.607 H3 C1 C6 106.914
H3 C1 C7 106.914 H4 C2 H5 117.556
C6 C1 C7 111.398 H8 C6 H9 108.003
H8 C6 H10 107.775 H9 C6 H10 107.858
H11 C7 H12 108.003 H11 C7 H13 107.775
H12 C7 H13 107.858
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.118      
2 C -0.253      
3 H 0.132      
4 H 0.119      
5 H 0.119      
6 C -0.378      
7 C -0.378      
8 H 0.130      
9 H 0.123      
10 H 0.125      
11 H 0.130      
12 H 0.123      
13 H 0.125      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.155 0.177 0.000 0.236
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.166 -0.036 0.000
y -0.036 -27.757 0.000
z 0.000 0.000 -26.828
Traceless
 xyz
x 0.127 -0.036 0.000
y -0.036 -0.760 0.000
z 0.000 0.000 0.633
Polar
3z2-r21.266
x2-y20.591
xy-0.036
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 94.363
(<r2>)1/2 9.714