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: ROHF/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 2A
Energy calculated at ROHF/6-311G*
 hartrees
Energy at 0K-117.652647
Energy at 298.15K-117.659179
HF Energy-117.652647
Nuclear repulsion energy75.496548
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 ROHF/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' 3301 2824 64.19      
2 A' 3234 2767 41.33      
3 A' 3199 2737 82.89      
4 A' 3139 2686 68.14      
5 A' 1627 1392 5.25      
6 A' 1625 1390 13.27      
7 A' 1555 1330 3.04      
8 A' 1284 1098 1.90      
9 A' 1150 984 0.64      
10 A' 927 793 1.62      
11 A' 541 463 19.82      
12 A' 380 326 1.62      
13 A' 188 161 0.19      
14 A" 3235 2768 43.35      
15 A" 3195 2734 12.34      
16 A" 3134 2681 33.88      
17 A" 1619 1385 0.73      
18 A" 1611 1378 1.37      
19 A" 1554 1330 5.41      
20 A" 1482 1268 4.51      
21 A" 1204 1030 0.01      
22 A" 1024 876 0.14      
23 A" 1012 866 0.57      
24 A" 144 124 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 20681.9 cm-1
Scaled (by 0.8556) Zero Point Vibrational Energy (zpe) 17695.4 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 ROHF/6-311G*
ABC
1.24233 0.27812 0.24886

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.019 0.553 0.000
C2 -0.019 -0.201 1.297
C3 -0.019 -0.201 -1.297
H4 0.437 1.529 0.000
H5 -0.788 -0.969 1.307
H6 -0.788 -0.969 -1.307
H7 0.934 -0.703 1.470
H8 -0.194 0.456 2.141
H9 0.934 -0.703 -1.470
H10 -0.194 0.456 -2.141

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.49981.49981.07792.14792.14792.15552.15052.15552.1505
C21.49982.59332.20991.08642.82131.09101.08462.96893.5045
C31.49982.59332.20992.82131.08642.96893.50451.09101.0846
H41.07792.20992.20993.07373.07372.71912.47672.71912.4767
H52.14791.08642.82133.07372.61431.74971.75463.27823.7780
H62.14792.82131.08643.07372.61433.27823.77801.74971.7546
H72.15551.09102.96892.71911.74973.27821.75172.93993.9570
H82.15051.08463.50452.47671.75463.77801.75173.95704.2823
H92.15552.96891.09102.71913.27821.74972.93993.95701.7517
H102.15053.50451.08462.47673.77801.75463.95704.28231.7517

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 111.304 C1 C2 H7 111.634
C1 C2 H8 111.623 C1 C3 H6 111.304
C1 C3 H9 111.634 C1 C3 H10 111.623
C2 C1 C3 119.664 C2 C1 H4 117.092
C3 C1 H4 117.092 H5 C2 H7 106.943
H5 C2 H8 107.841 H6 C3 H9 106.943
H6 C3 H10 107.841 H7 C2 H8 107.254
H9 C3 H10 107.254
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.205      
2 C -0.624      
3 C -0.624      
4 H 0.201      
5 H 0.207      
6 H 0.207      
7 H 0.205      
8 H 0.214      
9 H 0.205      
10 H 0.214      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.286 -0.113 0.000 0.308
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.569 0.594 -0.000
y 0.594 -21.035 0.001
z -0.000 0.001 -21.178
Traceless
 xyz
x -0.462 0.594 -0.000
y 0.594 0.338 0.001
z -0.000 0.001 0.124
Polar
3z2-r20.248
x2-y2-0.533
xy0.594
xz-0.000
yz0.001


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> 61.560
(<r2>)1/2 7.846