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: PBE1PBE/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 2A
Energy calculated at PBE1PBE/6-31G**
 hartrees
Energy at 0K-118.322364
Energy at 298.15K-118.328545
HF Energy-118.322364
Nuclear repulsion energy75.432713
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 PBE1PBE/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3213 3062 28.83      
2 A' 3140 2993 18.46      
3 A' 3077 2933 47.36      
4 A' 2996 2856 41.41      
5 A' 1521 1450 4.53      
6 A' 1508 1438 14.97      
7 A' 1439 1371 4.15      
8 A' 1195 1139 3.75      
9 A' 1045 996 0.66      
10 A' 908 866 2.12      
11 A' 410 391 16.78      
12 A' 359 342 9.84      
13 A' 129 123 0.16      
14 A" 3141 2994 22.92      
15 A" 3077 2932 6.56      
16 A" 2991 2851 27.53      
17 A" 1509 1438 0.66      
18 A" 1497 1427 1.72      
19 A" 1442 1374 8.65      
20 A" 1386 1321 2.20      
21 A" 1178 1123 0.03      
22 A" 952 908 1.47      
23 A" 947 903 0.41      
24 A" 117 111 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 19588.5 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 18669.8 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 PBE1PBE/6-31G**
ABC
1.24984 0.27851 0.24905

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.012 0.535 0.000
C2 -0.012 -0.197 1.294
C3 -0.012 -0.197 -1.294
H4 0.246 1.592 0.000
H5 -0.742 -1.018 1.291
H6 -0.742 -1.018 -1.291
H7 0.968 -0.659 1.511
H8 -0.246 0.460 2.138
H9 0.968 -0.659 -1.511
H10 -0.246 0.460 -2.138

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.48701.48701.08732.14762.14762.16112.15212.16112.1521
C21.48702.58822.22291.09872.80841.10471.09533.00703.5023
C31.48702.58822.22292.80841.09873.00703.50231.10471.0953
H41.08732.22292.22293.07453.07452.80572.46842.80572.4684
H52.14761.09872.80843.07452.58101.76111.77483.30173.7665
H62.14762.80841.09873.07452.58103.30173.76651.76111.7748
H72.16111.10473.00702.80571.76113.30171.76673.02214.0054
H82.15211.09533.50232.46841.77483.76651.76674.00544.2759
H92.16113.00701.10472.80573.30171.76113.02214.00541.7667
H102.15213.50231.09532.46843.76651.77484.00544.27591.7667

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 111.422 C1 C2 H7 112.146
C1 C2 H8 112.007 C1 C3 H6 111.422
C1 C3 H9 112.146 C1 C3 H10 112.007
C2 C1 C3 120.973 C2 C1 H4 118.594
C3 C1 H4 118.594 H5 C2 H7 106.112
H5 C2 H8 107.988 H6 C3 H9 106.112
H6 C3 H10 107.988 H7 C2 H8 106.842
H9 C3 H10 106.842
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.123      
2 C -0.549      
3 C -0.549      
4 H 0.160      
5 H 0.175      
6 H 0.175      
7 H 0.176      
8 H 0.179      
9 H 0.176      
10 H 0.179      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.184 -0.114 0.000 0.216
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.204 0.335 0.000
y 0.335 -20.187 0.000
z 0.000 0.000 -20.208
Traceless
 xyz
x -1.007 0.335 0.000
y 0.335 0.519 0.000
z 0.000 0.000 0.487
Polar
3z2-r20.975
x2-y2-1.017
xy0.335
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.916 0.065 0.000
y 0.065 4.755 0.000
z 0.000 0.000 5.499


<r2> (average value of r2) Å2
<r2> 61.205
(<r2>)1/2 7.823