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All results from a given calculation for CH3CHCH3 (Isopropyl radical)

using model chemistry: CISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 2A
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-117.254790
Energy at 298.15K-117.261068
HF Energy-116.985510
Nuclear repulsion energy74.836350
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 CISD/3-21G*
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' 3221 3010 26.18      
2 A' 3145 2939 17.97      
3 A' 3100 2896 44.12      
4 A' 3037 2838 33.89      
5 A' 1604 1498 5.26      
6 A' 1594 1489 13.48      
7 A' 1511 1412 4.95      
8 A' 1245 1163 5.07      
9 A' 1112 1039 0.87      
10 A' 865 808 1.25      
11 A' 421 393 15.85      
12 A' 358 335 11.82      
13 A' 144 135 0.20      
14 A" 3145 2939 23.61      
15 A" 3097 2893 4.87      
16 A" 3032 2833 15.88      
17 A" 1593 1489 1.76      
18 A" 1582 1479 0.55      
19 A" 1495 1397 4.73      
20 A" 1435 1340 7.89      
21 A" 1135 1060 0.25      
22 A" 1020 953 0.55      
23 A" 1001 935 1.02      
24 A" 132 123 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 20010.4 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 18697.7 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 CISD/3-21G*
ABC
1.21537 0.27395 0.24442

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.012 0.554 0.000
C2 -0.012 -0.205 1.309
C3 -0.012 -0.205 -1.309
H4 0.294 1.595 0.000
H5 -0.776 -0.992 1.296
H6 -0.776 -0.992 -1.296
H7 0.958 -0.694 1.490
H8 -0.216 0.459 2.154
H9 0.958 -0.694 -1.490
H10 -0.216 0.459 -2.154

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.51301.51301.08502.15742.15742.17252.16572.17252.1657
C21.51302.61732.24661.09682.82621.10131.09423.00243.5317
C31.51302.61732.24662.82621.09683.00243.53171.10131.0942
H41.08502.24662.24663.08523.08522.81102.48792.81102.4879
H52.15741.09682.82623.08522.59221.77021.77673.29553.7847
H62.15742.82621.09683.08522.59223.29553.78471.77021.7767
H72.17251.10133.00242.81101.77023.29551.77382.98083.9985
H82.16571.09423.53172.48791.77673.78471.77383.99854.3081
H92.17253.00241.10132.81103.29551.77022.98083.99851.7738
H102.16573.53171.09422.48793.78471.77673.99854.30811.7738

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 110.497 C1 C2 H7 111.436
C1 C2 H8 111.319 C1 C3 H6 110.497
C1 C3 H9 111.436 C1 C3 H10 111.319
C2 C1 C3 119.751 C2 C1 H4 118.784
C3 C1 H4 118.784 H5 C2 H7 107.281
H5 C2 H8 108.363 H6 C3 H9 107.281
H6 C3 H10 108.363 H7 C2 H8 107.787
H9 C3 H10 107.787
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability