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

using model chemistry: CCD/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 CCD/3-21G*
 hartrees
Energy at 0K-117.281482
Energy at 298.15K-117.287734
HF Energy-116.984897
Nuclear repulsion energy74.598980
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 CCD/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' 3170 3033 25.61      
2 A' 3093 2959 18.46      
3 A' 3048 2915 43.85      
4 A' 2985 2855 30.55      
5 A' 1580 1512 4.98      
6 A' 1570 1501 12.70      
7 A' 1487 1422 4.58      
8 A' 1224 1171 4.74      
9 A' 1097 1049 0.76      
10 A' 853 816 1.14      
11 A' 419 401 16.36      
12 A' 356 340 10.59      
13 A' 143 137 0.15      
14 A" 3093 2959 22.47      
15 A" 3046 2913 4.47      
16 A" 2982 2852 15.70      
17 A" 1571 1502 1.65      
18 A" 1559 1491 0.52      
19 A" 1472 1408 4.12      
20 A" 1415 1354 7.48      
21 A" 1120 1072 0.27      
22 A" 1004 961 0.63      
23 A" 985 942 0.95      
24 A" 132 126 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 19701.2 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 18844.2 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 CCD/3-21G*
ABC
1.20756 0.27236 0.24305

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.013 0.555 0.000
C2 -0.013 -0.206 1.312
C3 -0.013 -0.206 -1.312
H4 0.298 1.599 0.000
H5 -0.776 -1.000 1.297
H6 -0.776 -1.000 -1.297
H7 0.963 -0.691 1.499
H8 -0.224 0.461 2.160
H9 0.963 -0.691 -1.499
H10 -0.224 0.461 -2.160

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.51691.51691.08952.16352.16352.17982.17202.17982.1720
C21.51692.62462.25331.10132.83171.10581.09873.01483.5417
C31.51692.62462.25332.83171.10133.01483.54171.10581.0987
H41.08952.25332.25333.09673.09672.81702.49652.81702.4965
H52.16351.10132.83173.09672.59311.77781.78423.30643.7926
H62.16352.83171.10133.09672.59313.30643.79261.77781.7842
H72.17981.10583.01482.81701.77783.30641.78142.99714.0149
H82.17201.09873.54172.49651.78423.79261.78144.01494.3194
H92.17983.01481.10582.81703.30641.77782.99714.01491.7814
H102.17203.54171.09872.49653.79261.78424.01494.31941.7814

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 110.438 C1 C2 H7 111.465
C1 C2 H8 111.272 C1 C3 H6 110.438
C1 C3 H9 111.465 C1 C3 H10 111.272
C2 C1 C3 119.784 C2 C1 H4 118.738
C3 C1 H4 118.738 H5 C2 H7 107.317
H5 C2 H8 108.380 H6 C3 H9 107.317
H6 C3 H10 108.380 H7 C2 H8 107.815
H9 C3 H10 107.815
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability