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

using model chemistry: QCISD/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 QCISD/3-21G*
 hartrees
Energy at 0K-117.283601
Energy at 298.15K-117.289836
HF Energy-116.984754
Nuclear repulsion energy74.550437
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/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' 3153 3030 26.23      
2 A' 3079 2959 18.37      
3 A' 3031 2913 44.44      
4 A' 2964 2849 34.93      
5 A' 1576 1514 4.74      
6 A' 1565 1504 12.18      
7 A' 1481 1424 4.34      
8 A' 1220 1172 4.61      
9 A' 1092 1049 0.75      
10 A' 847 814 1.16      
11 A' 414 398 15.53      
12 A' 354 340 11.34      
13 A' 140 135 0.17      
14 A" 3079 2959 23.87      
15 A" 3029 2911 5.13      
16 A" 2961 2846 15.66      
17 A" 1566 1505 1.54      
18 A" 1554 1493 0.47      
19 A" 1466 1409 3.33      
20 A" 1408 1353 7.78      
21 A" 1112 1069 0.28      
22 A" 1001 962 0.69      
23 A" 982 944 0.82      
24 A" 132 127 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 19600.7 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 18838.3 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 QCISD/3-21G*
ABC
1.20633 0.27201 0.24270

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.012 0.555 0.000
C2 -0.012 -0.206 1.313
C3 -0.012 -0.206 -1.313
H4 0.288 1.603 0.000
H5 -0.774 -1.002 1.297
H6 -0.774 -1.002 -1.297
H7 0.965 -0.691 1.501
H8 -0.225 0.461 2.161
H9 0.965 -0.691 -1.501
H10 -0.225 0.461 -2.161

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.51761.51761.09032.16512.16512.18192.17332.18192.1733
C21.51762.62622.25541.10222.83351.10691.09943.01843.5438
C31.51762.62622.25542.83351.10223.01843.54381.10691.0994
H41.09032.25542.25543.09803.09802.82392.49722.82392.4972
H52.16511.10222.83353.09802.59461.77851.78563.30963.7950
H62.16512.83351.10223.09802.59463.30963.79501.77851.7856
H72.18191.10693.01842.82391.77853.30961.78233.00264.0191
H82.17331.09943.54382.49721.78563.79501.78234.01914.3217
H92.18193.01841.10692.82393.30961.77853.00264.01911.7823
H102.17333.54381.09942.49723.79501.78564.01914.32171.7823

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 110.467 C1 C2 H7 111.518
C1 C2 H8 111.288 C1 C3 H6 110.467
C1 C3 H9 111.518 C1 C3 H10 111.288
C2 C1 C3 119.825 C2 C1 H4 118.812
C3 C1 H4 118.812 H5 C2 H7 107.236
H5 C2 H8 108.402 H6 C3 H9 107.236
H6 C3 H10 108.402 H7 C2 H8 107.771
H9 C3 H10 107.771
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability