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

using model chemistry: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-118.051182
Energy at 298.15K-118.057454
HF Energy-117.635383
Nuclear repulsion energy75.183243
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 QCISD/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3198 3045 31.62      
2 A' 3133 2983 22.39      
3 A' 3079 2932 51.77      
4 A' 3003 2860 40.55      
5 A' 1546 1472 3.99      
6 A' 1533 1460 12.02      
7 A' 1469 1399 3.20      
8 A' 1217 1159 2.57      
9 A' 1077 1026 0.10      
10 A' 909 866 1.63      
11 A' 432 412 18.14      
12 A' 362 345 6.62      
13 A' 151 144 0.15      
14 A" 3133 2984 25.21      
15 A" 3078 2931 6.17      
16 A" 3000 2856 23.09      
17 A" 1536 1463 0.87      
18 A" 1523 1450 1.12      
19 A" 1470 1399 6.82      
20 A" 1415 1347 2.62      
21 A" 1182 1126 0.00      
22 A" 977 930 0.74      
23 A" 964 918 0.49      
24 A" 129 122 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 19757.2 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 18814.8 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 QCISD/6-31G*
ABC
1.23374 0.27702 0.24755

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.013 0.543 0.000
C2 -0.013 -0.200 1.299
C3 -0.013 -0.200 -1.299
H4 0.296 1.588 0.000
H5 -0.766 -1.002 1.294
H6 -0.766 -1.002 -1.294
H7 0.961 -0.683 1.497
H8 -0.226 0.463 2.145
H9 0.961 -0.683 -1.497
H10 -0.226 0.463 -2.145

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.49641.49641.08932.15162.15162.16642.15752.16642.1575
C21.49642.59722.23141.09962.81661.10501.09672.99953.5138
C31.49642.59722.23142.81661.09962.99953.51381.10501.0967
H41.08932.23142.23143.08373.08372.79972.47802.79972.4780
H52.15161.09962.81663.08372.58891.76771.77813.29783.7776
H62.15162.81661.09963.08372.58893.29783.77761.76771.7781
H72.16641.10502.99952.79971.76773.29781.77282.99393.9987
H82.15751.09673.51382.47801.77813.77761.77283.99874.2909
H92.16642.99951.10502.79973.29781.76772.99393.99871.7728
H102.15753.51381.09672.47803.77761.77813.99874.29091.7728

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 111.034 C1 C2 H7 111.890
C1 C2 H8 111.685 C1 C3 H6 111.034
C1 C3 H9 111.890 C1 C3 H10 111.685
C2 C1 C3 120.408 C2 C1 H4 118.453
C3 C1 H4 118.453 H5 C2 H7 106.609
H5 C2 H8 108.115 H6 C3 H9 106.609
H6 C3 H10 108.115 H7 C2 H8 107.262
H9 C3 H10 107.262
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability