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

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 2A
Energy calculated at CBS-Q
 hartrees
Energy at 0K-118.199720
Energy at 298.15K-118.193697
HF Energy-117.635037
Nuclear repulsion energy75.281682
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 CBS-Q
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' 3314 3314 49.62      
2 A' 3250 3250 34.08      
3 A' 3210 3210 70.31      
4 A' 3140 3140 53.75      
5 A' 1630 1630 3.29      
6 A' 1624 1624 9.37      
7 A' 1554 1554 2.05      
8 A' 1279 1279 2.15      
9 A' 1135 1135 0.24      
10 A' 925 925 1.61      
11 A' 482 482 16.75      
12 A' 373 373 3.15      
13 A' 167 167 0.15      
14 A" 3251 3251 34.92      
15 A" 3206 3206 10.24      
16 A" 3134 3134 30.31      
17 A" 1621 1621 0.46      
18 A" 1612 1612 0.90      
19 A" 1552 1552 3.79      
20 A" 1478 1478 5.97      
21 A" 1204 1204 0.14      
22 A" 1025 1025 0.23      
23 A" 1010 1010 0.45      
24 A" 133 133 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 20654.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 20654.5 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 CBS-Q
ABC
1.22889 0.27766 0.24795

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.016 0.546 0.000
C2 -0.016 -0.201 1.303
C3 -0.016 -0.201 -1.303
H4 0.367 1.556 0.000
H5 -0.766 -0.992 1.304
H6 -0.766 -0.992 -1.304
H7 0.950 -0.678 1.496
H8 -0.223 0.459 2.142
H9 0.950 -0.678 -1.496
H10 -0.223 0.459 -2.142

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.50221.50221.08032.15162.15162.16092.15402.16092.1540
C21.50222.60602.22111.08962.82601.09441.08782.99873.5141
C31.50222.60602.22112.82601.08962.99873.51411.09441.0878
H41.08032.22112.22113.07863.07862.75152.47832.75152.4783
H52.15161.08962.82603.07862.60901.75451.76093.29883.7788
H62.15162.82601.08963.07862.60903.29883.77881.75451.7609
H72.16091.09442.99872.75151.75453.29881.75732.99113.9879
H82.15401.08783.51412.47831.76093.77881.75733.98794.2846
H92.16092.99871.09442.75153.29881.75452.99113.98791.7573
H102.15403.51411.08782.47833.77881.76093.98794.28461.7573

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 111.234 C1 C2 H7 111.693
C1 C2 H8 111.547 C1 C3 H6 111.234
C1 C3 H9 111.693 C1 C3 H10 111.547
C2 C1 C3 120.318 C2 C1 H4 117.726
C3 C1 H4 117.726 H5 C2 H7 106.904
H5 C2 H8 107.947 H6 C3 H9 106.904
H6 C3 H10 107.947 H7 C2 H8 107.281
H9 C3 H10 107.281
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability