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: PBEPBEultrafine/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 2A
Energy calculated at PBEPBEultrafine/cc-pVDZ
 hartrees
Energy at 0K-118.298561
Energy at 298.15K-118.304631
HF Energy-118.298561
Nuclear repulsion energy74.901322
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 PBEPBEultrafine/cc-pVDZ
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' 3100 3082 27.26      
2 A' 3041 3023 13.46      
3 A' 2966 2949 43.17      
4 A' 2873 2856 48.20      
5 A' 1410 1402 3.49      
6 A' 1397 1389 12.61      
7 A' 1336 1328 3.89      
8 A' 1128 1122 2.83      
9 A' 979 974 0.56      
10 A' 881 876 2.37      
11 A' 400 397 15.13      
12 A' 355 353 6.09      
13 A' 120 119 0.11      
14 A" 3043 3025 20.42      
15 A" 2966 2949 8.33      
16 A" 2867 2851 33.52      
17 A" 1401 1392 0.08      
18 A" 1388 1380 2.51      
19 A" 1348 1340 7.37      
20 A" 1299 1291 2.04      
21 A" 1137 1130 0.22      
22 A" 897 892 0.84      
23 A" 889 884 1.07      
24 A" 111 110 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 18666.3 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 18558.0 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 PBEPBEultrafine/cc-pVDZ
ABC
1.23219 0.27564 0.24645

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.012 0.535 0.000
C2 -0.012 -0.196 1.299
C3 -0.012 -0.196 -1.299
H4 0.231 1.610 0.000
H5 -0.736 -1.042 1.296
H6 -0.736 -1.042 -1.296
H7 0.985 -0.656 1.527
H8 -0.256 0.465 2.155
H9 0.985 -0.656 -1.527
H10 -0.256 0.465 -2.155

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.49061.49061.10242.16562.16562.17812.16982.17812.1698
C21.49062.59782.23821.11322.82361.12091.10873.03193.5249
C31.49062.59782.23822.82361.11323.03193.52491.12091.1087
H41.10242.23822.23823.10603.10602.83502.48852.83502.4885
H52.16561.11322.82363.10602.59201.77871.79913.32903.7957
H62.16562.82361.11323.10602.59203.32903.79571.77871.7991
H72.17811.12093.03192.83501.77873.32901.78593.05494.0441
H82.16981.10873.52492.48851.79913.79571.78594.04414.3096
H92.17813.03191.12092.83503.32901.77873.05494.04411.7859
H102.16983.52491.10872.48853.79571.79914.04414.30961.7859

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 111.728 C1 C2 H7 112.261
C1 C2 H8 112.348 C1 C3 H6 111.728
C1 C3 H9 112.261 C1 C3 H10 112.348
C2 C1 C3 121.247 C2 C1 H4 118.589
C3 C1 H4 118.589 H5 C2 H7 105.524
H5 C2 H8 108.128 H6 C3 H9 105.524
H6 C3 H10 108.128 H7 C2 H8 106.451
H9 C3 H10 106.451
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.168      
2 C -0.034      
3 C -0.034      
4 H 0.008      
5 H 0.035      
6 H 0.035      
7 H 0.041      
8 H 0.037      
9 H 0.041      
10 H 0.037      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.169 -0.153 0.000 0.228
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.551 0.288 0.000
y 0.288 -20.604 0.000
z 0.000 0.000 -20.476
Traceless
 xyz
x -1.011 0.288 0.000
y 0.288 0.410 0.000
z 0.000 0.000 0.601
Polar
3z2-r21.203
x2-y2-0.947
xy0.288
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.333 0.052 0.000
y 0.052 5.291 0.000
z 0.000 0.000 6.390


<r2> (average value of r2) Å2
<r2> 62.042
(<r2>)1/2 7.877