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=FULL/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=FULL/6-31G**
 hartrees
Energy at 0K-118.336643
Energy at 298.15K-118.342882
HF Energy-118.196777
Nuclear repulsion energy75.458505
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=FULL/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' 3224 3224 30.90      
2 A' 3153 3153 22.37      
3 A' 3094 3094 50.72      
4 A' 3013 3013 43.00      
5 A' 1531 1531 3.16      
6 A' 1520 1520 10.61      
7 A' 1450 1450 2.56      
8 A' 1204 1204 2.71      
9 A' 1059 1059 0.12      
10 A' 902 902 1.55      
11 A' 424 424 16.41      
12 A' 364 364 6.35      
13 A' 142 142 0.11      
14 A" 3154 3154 24.62      
15 A" 3093 3093 7.03      
16 A" 3008 3008 25.43      
17 A" 1520 1520 0.37      
18 A" 1509 1509 1.01      
19 A" 1450 1450 5.81      
20 A" 1399 1399 4.50      
21 A" 1172 1172 0.03      
22 A" 962 962 1.23      
23 A" 955 955 0.18      
24 A" 124 124 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 19712.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 19712.1 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=FULL/6-31G**
ABC
1.24962 0.27823 0.24877

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.013 0.538 0.000
C2 -0.013 -0.198 1.296
C3 -0.013 -0.198 -1.296
H4 0.272 1.584 0.000
H5 -0.745 -1.011 1.290
H6 -0.745 -1.011 -1.290
H7 0.963 -0.663 1.506
H8 -0.241 0.458 2.137
H9 0.963 -0.663 -1.506
H10 -0.241 0.458 -2.137

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.49071.49071.08372.14562.14562.15932.15072.15932.1507
C21.49072.59162.22211.09432.80821.10041.09123.00273.5025
C31.49072.59162.22212.80821.09433.00273.50251.10041.0912
H41.08372.22212.22213.07183.07182.79182.46942.79182.4694
H52.14561.09432.80823.07182.58091.75621.76923.29513.7631
H62.14562.80821.09433.07182.58093.29513.76311.75621.7692
H72.15931.10043.00272.79181.75623.29511.76153.01193.9970
H82.15071.09123.50252.46941.76923.76311.76153.99704.2741
H92.15933.00271.10042.79183.29511.75623.01193.99701.7615
H102.15073.50251.09122.46943.76311.76923.99704.27411.7615

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 111.278 C1 C2 H7 112.009
C1 C2 H8 111.887 C1 C3 H6 111.278
C1 C3 H9 112.009 C1 C3 H10 111.887
C2 C1 C3 120.746 C2 C1 H4 118.488
C3 C1 H4 118.488 H5 C2 H7 106.301
H5 C2 H8 108.096 H6 C3 H9 106.301
H6 C3 H10 108.096 H7 C2 H8 106.979
H9 C3 H10 106.979
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability