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: B2PLYP/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 B2PLYP/6-31G**
 hartrees
Energy at 0K-118.332169
Energy at 298.15K-118.338407
HF Energy-118.196771
Nuclear repulsion energy75.434079
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 B2PLYP/6-31G**
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' 3223 3223 31.05      
2 A' 3152 3152 22.48      
3 A' 3093 3093 50.78      
4 A' 3012 3012 43.23      
5 A' 1530 1530 3.15      
6 A' 1519 1519 10.53      
7 A' 1449 1449 2.52      
8 A' 1203 1203 2.69      
9 A' 1059 1059 0.11      
10 A' 901 901 1.55      
11 A' 424 424 16.47      
12 A' 364 364 6.26      
13 A' 142 142 0.11      
14 A" 3153 3153 24.72      
15 A" 3092 3092 7.09      
16 A" 3007 3007 25.43      
17 A" 1519 1519 0.36      
18 A" 1509 1509 1.00      
19 A" 1449 1449 5.77      
20 A" 1398 1398 4.56      
21 A" 1171 1171 0.03      
22 A" 961 961 1.22      
23 A" 955 955 0.18      
24 A" 124 124 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 19705.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 19705.2 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 B2PLYP/6-31G**
ABC
1.24890 0.27803 0.24860

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.013 0.539 0.000
C2 -0.013 -0.199 1.296
C3 -0.013 -0.199 -1.296
H4 0.273 1.584 0.000
H5 -0.745 -1.012 1.291
H6 -0.745 -1.012 -1.291
H7 0.963 -0.663 1.507
H8 -0.241 0.458 2.138
H9 0.963 -0.663 -1.507
H10 -0.241 0.458 -2.138

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.49121.49121.08402.14632.14632.16002.15132.16002.1513
C21.49122.59252.22271.09462.80901.10071.09153.00413.5036
C31.49122.59252.22272.80901.09463.00413.50361.10071.0915
H41.08402.22272.22273.07293.07292.79202.47032.79202.4703
H52.14631.09462.80903.07292.58141.75681.76973.29633.7641
H62.14632.80901.09463.07292.58143.29633.76411.75681.7697
H72.16001.10073.00412.79201.75683.29631.76203.01363.9986
H82.15131.09153.50362.47031.76973.76411.76203.99864.2752
H92.16003.00411.10072.79203.29631.75683.01363.99861.7620
H102.15133.50361.09152.47033.76411.76973.99864.27521.7620

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 111.275 C1 C2 H7 112.011
C1 C2 H8 111.879 C1 C3 H6 111.275
C1 C3 H9 112.011 C1 C3 H10 111.879
C2 C1 C3 120.749 C2 C1 H4 118.478
C3 C1 H4 118.478 H5 C2 H7 106.307
H5 C2 H8 108.098 H6 C3 H9 106.307
H6 C3 H10 108.098 H7 C2 H8 106.980
H9 C3 H10 106.980
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.084      
2 C -0.340      
3 C -0.340      
4 H 0.096      
5 H 0.110      
6 H 0.110      
7 H 0.111      
8 H 0.112      
9 H 0.111      
10 H 0.112      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.185 -0.115 0.000 0.218
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.316 0.340 0.000
y 0.340 -20.478 0.000
z 0.000 0.000 -20.496
Traceless
 xyz
x -0.829 0.340 0.000
y 0.340 0.428 0.000
z 0.000 0.000 0.401
Polar
3z2-r20.802
x2-y2-0.838
xy0.340
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.939 0.082 0.000
y 0.082 4.756 0.000
z 0.000 0.000 5.462


<r2> (average value of r2) Å2
<r2> 61.372
(<r2>)1/2 7.834