return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CHCH3 (Isopropyl radical)

using model chemistry: B3LYP/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 2A
Energy calculated at B3LYP/CEP-31G*
 hartrees
Energy at 0K-21.103792
Energy at 298.15K-21.109751
HF Energy-21.103792
Nuclear repulsion energy43.819387
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 B3LYP/CEP-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' 3175 3066 47.93      
2 A' 3103 2997 32.18      
3 A' 3040 2936 82.83      
4 A' 2980 2878 61.21      
5 A' 1493 1441 5.36      
6 A' 1480 1429 17.75      
7 A' 1410 1362 4.58      
8 A' 1169 1129 5.04      
9 A' 1003 969 0.46      
10 A' 882 851 1.88      
11 A' 365 353 8.90      
12 A' 315 304 42.31      
13 A' 97 94 3.70      
14 A" 3103 2996 42.67      
15 A" 3038 2934 8.63      
16 A" 2975 2873 28.93      
17 A" 1479 1428 1.17      
18 A" 1470 1420 0.86      
19 A" 1417 1368 8.72      
20 A" 1344 1298 4.39      
21 A" 1133 1094 0.02      
22 A" 936 904 0.90      
23 A" 921 889 0.69      
24 A" 105 102 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 19215.9 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 18556.8 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 B3LYP/CEP-31G*
ABC
1.20099 0.27147 0.24175

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.011 0.569 0.000
C2 -0.011 -0.189 1.313
C3 -0.011 -0.189 -1.313
H4 0.180 1.648 0.000
H5 -0.806 -0.961 1.331
H6 -0.806 -0.961 -1.331
H7 0.949 -0.726 1.478
H8 -0.165 0.482 2.176
H9 0.949 -0.726 -1.478
H10 -0.165 0.482 -2.176

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.51631.51631.09522.17812.17812.18762.18332.18762.1833
C21.51632.62612.26591.10792.86631.11251.10393.00023.5564
C31.51632.62612.26592.86631.10793.00023.55641.11251.1039
H41.09522.26592.26593.09023.09022.90022.49292.90022.4929
H52.17811.10792.86633.09022.66111.77621.79093.31993.8456
H62.17812.86631.10793.09022.66113.31993.84561.77621.7909
H72.18761.11253.00022.90021.77623.31991.78532.95644.0068
H82.18331.10393.55642.49291.79093.84561.78534.00684.3523
H92.18763.00021.11252.90023.31991.77622.95644.00681.7853
H102.18333.55641.10392.49293.84561.79094.00684.35231.7853

picture of Isopropyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 111.240 C1 C2 H7 111.719
C1 C2 H8 111.911 C1 C3 H6 111.240
C1 C3 H9 111.719 C1 C3 H10 111.911
C2 C1 C3 119.980 C2 C1 H4 119.500
C3 C1 H4 119.500 H5 C2 H7 106.247
H5 C2 H8 108.132 H6 C3 H9 106.247
H6 C3 H10 108.132 H7 C2 H8 107.318
H9 C3 H10 107.318
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.254      
2 C -0.446      
3 C -0.446      
4 H 0.236      
5 H 0.151      
6 H 0.151      
7 H 0.141      
8 H 0.163      
9 H 0.141      
10 H 0.163      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.200 -0.140 0.000 0.244
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.135 0.368 0.000
y 0.368 -20.017 0.000
z 0.000 0.000 -20.310
Traceless
 xyz
x -0.971 0.368 0.000
y 0.368 0.705 0.000
z 0.000 0.000 0.266
Polar
3z2-r20.531
x2-y2-1.118
xy0.368
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.816 -0.028 0.000
y -0.028 4.670 0.000
z 0.000 0.000 5.539


<r2> (average value of r2) Å2
<r2> 54.822
(<r2>)1/2 7.404