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: CCSD(T)/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 2A
Energy calculated at CCSD(T)/6-311G*
 hartrees
Energy at 0K-118.108476
Energy at 298.15K-118.114672
HF Energy-117.656156
Nuclear repulsion energy75.075402
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 CCSD(T)/6-311G*
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' 3154 3036        
2 A' 3093 2977        
3 A' 3033 2920        
4 A' 2956 2846        
5 A' 1518 1461        
6 A' 1506 1449        
7 A' 1441 1388        
8 A' 1196 1151        
9 A' 1053 1014        
10 A' 894 861        
11 A' 408 393        
12 A' 350 337        
13 A' 147 142        
14 A" 3094 2978        
15 A" 3032 2919        
16 A" 2953 2843        
17 A" 1507 1450        
18 A" 1493 1437        
19 A" 1442 1388        
20 A" 1388 1336        
21 A" 1161 1117        
22 A" 958 922        
23 A" 946 911        
24 A" 114 110        

Unscaled Zero Point Vibrational Energy (zpe) 19418.6 cm-1
Scaled (by 0.9626) Zero Point Vibrational Energy (zpe) 18692.3 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 CCSD(T)/6-311G*
ABC
1.22771 0.27641 0.24679

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.013 0.546 0.000
C2 -0.013 -0.201 1.300
C3 -0.013 -0.201 -1.300
H4 0.281 1.596 0.000
H5 -0.783 -0.987 1.306
H6 -0.783 -0.987 -1.306
H7 0.954 -0.707 1.483
H8 -0.198 0.465 2.152
H9 0.954 -0.707 -1.483
H10 -0.198 0.465 -2.152

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.49941.49941.09052.15572.15572.16822.16132.16822.1613
C21.49942.60072.23731.10052.82881.10611.09692.98933.5208
C31.49942.60072.23732.82881.10052.98933.52081.10611.0969
H41.09052.23732.23733.08363.08362.81982.47752.81982.4775
H52.15571.10052.82883.08362.61131.76831.77983.29713.7956
H62.15572.82881.10053.08362.61133.29713.79561.76831.7798
H72.16821.10612.98932.81981.76833.29711.77412.96553.9887
H82.16131.09693.52082.47751.77983.79561.77413.98874.3037
H92.16822.98931.10612.81983.29711.76832.96553.98871.7741
H102.16133.52081.09692.47753.79561.77983.98874.30371.7741

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 111.095 C1 C2 H7 111.751
C1 C2 H8 111.764 C1 C3 H6 111.095
C1 C3 H9 111.751 C1 C3 H10 111.764
C2 C1 C3 120.273 C2 C1 H4 118.652
C3 C1 H4 118.652 H5 C2 H7 106.518
H5 C2 H8 108.183 H6 C3 H9 106.518
H6 C3 H10 108.183 H7 C2 H8 107.280
H9 C3 H10 107.280
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability