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

using model chemistry: PBEPBE/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 2A
Energy calculated at PBEPBE/3-21G
 hartrees
Energy at 0K-117.652737
Energy at 298.15K-117.658850
HF Energy-117.652737
Nuclear repulsion energy74.844673
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 PBEPBE/3-21G
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' 3120 3091 24.58      
2 A' 3041 3013 13.20      
3 A' 2970 2943 41.74      
4 A' 2887 2861 41.98      
5 A' 1514 1501 6.04      
6 A' 1501 1487 17.89      
7 A' 1416 1403 7.24      
8 A' 1175 1165 7.64      
9 A' 1034 1025 3.72      
10 A' 865 857 2.02      
11 A' 389 385 11.43      
12 A' 344 341 22.70      
13 A' 117 116 0.44      
14 A" 3042 3014 23.12      
15 A" 2969 2942 6.44      
16 A" 2881 2855 20.68      
17 A" 1499 1485 2.23      
18 A" 1486 1473 0.83      
19 A" 1398 1385 5.65      
20 A" 1356 1344 7.91      
21 A" 1124 1113 1.12      
22 A" 952 943 2.32      
23 A" 946 938 0.38      
24 A" 121 120 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 19073.8 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 18900.2 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 PBEPBE/3-21G
ABC
1.21439 0.27598 0.24604

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.011 0.547 0.000
C2 -0.011 -0.201 1.301
C3 -0.011 -0.201 -1.301
H4 0.226 1.616 0.000
H5 -0.761 -1.017 1.288
H6 -0.761 -1.017 -1.288
H7 0.974 -0.685 1.501
H8 -0.230 0.461 2.157
H9 0.974 -0.685 -1.501
H10 -0.230 0.461 -2.157

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.50071.50071.09452.16122.16122.17712.16942.17712.1694
C21.50072.60132.24721.10862.81641.11531.10413.00853.5268
C31.50072.60132.24722.81641.10863.00853.52681.11531.1041
H41.09452.24722.24723.09323.09322.84692.48852.84692.4885
H52.16121.10862.81643.09322.57691.77961.79473.30173.7862
H62.16122.81641.10863.09322.57693.30173.78621.77961.7947
H72.17711.11533.00852.84691.77963.30171.78653.00144.0171
H82.16941.10413.52682.48851.79473.78621.78654.01714.3132
H92.17713.00851.11532.84693.30171.77963.00144.01711.7865
H102.16943.52681.10412.48853.78621.79474.01714.31321.7865

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 110.954 C1 C2 H7 111.818
C1 C2 H8 111.885 C1 C3 H6 110.954
C1 C3 H9 111.818 C1 C3 H10 111.885
C2 C1 C3 120.154 C2 C1 H4 119.146
C3 C1 H4 119.146 H5 C2 H7 106.308
H5 C2 H8 108.409 H6 C3 H9 106.308
H6 C3 H10 108.409 H7 C2 H8 107.210
H9 C3 H10 107.210
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.158      
2 C -0.643      
3 C -0.643      
4 H 0.188      
5 H 0.209      
6 H 0.209      
7 H 0.209      
8 H 0.210      
9 H 0.209      
10 H 0.210      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.199 -0.166 0.000 0.260
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.544 0.343 0.000
y 0.343 -20.240 0.000
z 0.000 0.000 -20.071
Traceless
 xyz
x -1.388 0.343 0.000
y 0.343 0.567 0.000
z 0.000 0.000 0.821
Polar
3z2-r21.642
x2-y2-1.303
xy0.343
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.680 0.056 0.000
y 0.056 4.624 0.000
z 0.000 0.000 5.477


<r2> (average value of r2) Å2
<r2> 61.845
(<r2>)1/2 7.864