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: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 2A
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-117.804730
Energy at 298.15K-117.810894
HF Energy-117.804730
Nuclear repulsion energy75.301467
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 mPW1PW91/3-21G*
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' 3216 3054 22.48      
2 A' 3136 2978 13.19      
3 A' 3073 2918 39.98      
4 A' 2999 2847 33.71      
5 A' 1563 1485 6.96      
6 A' 1553 1474 20.20      
7 A' 1469 1395 8.46      
8 A' 1218 1157 8.29      
9 A' 1072 1018 3.49      
10 A' 886 842 1.97      
11 A' 397 377 10.61      
12 A' 347 330 25.00      
13 A' 121 115 0.60      
14 A" 3137 2979 21.39      
15 A" 3072 2917 5.03      
16 A" 2994 2843 17.87      
17 A" 1548 1470 2.76      
18 A" 1538 1461 1.03      
19 A" 1452 1378 9.68      
20 A" 1402 1331 6.98      
21 A" 1153 1095 0.82      
22 A" 988 938 1.36      
23 A" 980 931 1.28      
24 A" 119 113 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 19715.0 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 18721.4 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 mPW1PW91/3-21G*
ABC
1.22823 0.27891 0.24860

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.011 0.546 0.000
C2 -0.011 -0.202 1.295
C3 -0.011 -0.202 -1.295
H4 0.228 1.605 0.000
H5 -0.766 -0.999 1.286
H6 -0.766 -0.999 -1.286
H7 0.962 -0.689 1.482
H8 -0.215 0.457 2.144
H9 0.962 -0.689 -1.482
H10 -0.215 0.457 -2.144

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.49541.49541.08492.14792.14792.16062.15602.16062.1560
C21.49542.58952.23531.09832.80501.10381.09442.98203.5076
C31.49542.58952.23532.80501.09832.98203.50761.10381.0944
H41.08492.23532.23533.06963.06962.82772.47232.82772.4723
H52.14791.09832.80503.06962.57251.76601.77763.27763.7673
H62.14792.80501.09833.06962.57253.27763.76731.76601.7776
H72.16061.10382.98202.82771.76603.27761.77162.96363.9810
H82.15601.09443.50762.47231.77763.76731.77163.98104.2887
H92.16062.98201.10382.82773.27761.76602.96363.98101.7716
H102.15603.50761.09442.47233.76731.77763.98104.28871.7716

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 110.890 C1 C2 H7 111.573
C1 C2 H8 111.777 C1 C3 H6 110.890
C1 C3 H9 111.573 C1 C3 H10 111.777
C2 C1 C3 119.956 C2 C1 H4 119.213
C3 C1 H4 119.213 H5 C2 H7 106.643
H5 C2 H8 108.326 H6 C3 H9 106.643
H6 C3 H10 108.326 H7 C2 H8 107.406
H9 C3 H10 107.406
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.181      
2 C -0.674      
3 C -0.674      
4 H 0.206      
5 H 0.220      
6 H 0.220      
7 H 0.220      
8 H 0.221      
9 H 0.220      
10 H 0.221      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.202 -0.149 0.000 0.251
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.448 0.358 0.000
y 0.358 -20.163 0.000
z 0.000 0.000 -20.078
Traceless
 xyz
x -1.328 0.358 0.000
y 0.358 0.601 0.000
z 0.000 0.000 0.727
Polar
3z2-r21.454
x2-y2-1.286
xy0.358
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.597 0.065 0.000
y 0.065 4.471 0.000
z 0.000 0.000 5.150


<r2> (average value of r2) Å2
<r2> 61.247
(<r2>)1/2 7.826