return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: PM6

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
Energy calculated at PM6
 hartrees
Energy at 0K 
Energy at 298.15K0.006953
HF Energy0.006953
Nuclear repulsion energy55.827407
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 PM6
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' 2787 2961 22.67      
2 A' 2765 2937 27.19      
3 A' 2695 2863 67.51      
4 A' 2685 2852 119.30      
5 A' 1343 1426 37.15      
6 A' 1249 1327 82.57      
7 A' 1239 1316 65.08      
8 A' 1185 1259 33.69      
9 A' 1002 1064 27.03      
10 A' 984 1045 24.48      
11 A' 601 638 79.84      
12 A' 398 423 3.58      
13 A' 16 17 0.77      
14 A" 2782 2956 39.99      
15 A" 2695 2863 24.28      
16 A" 2682 2849 0.42      
17 A" 1397 1484 78.92      
18 A" 1321 1404 87.34      
19 A" 1243 1321 5.95      
20 A" 1235 1312 12.57      
21 A" 1217 1293 1.63      
22 A" 948 1007 15.24      
23 A" 905 962 0.10      
24 A" 57i 61i 0.18      

Unscaled Zero Point Vibrational Energy (zpe) 17657.1 cm-1
Scaled (by 1.0624) Zero Point Vibrational Energy (zpe) 18758.9 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 PM6
ABC
1.26604 0.28219 0.25254

See section I.F.4 to change rotational constant units
Geometric Data calculated at PM6

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.004 0.525 0.000
C2 -0.004 -0.197 1.285
C3 -0.004 -0.197 -1.285
H4 0.029 1.600 0.000
H5 -0.621 -1.106 1.255
H6 -0.621 -1.106 -1.255
H7 1.018 -0.514 1.549
H8 -0.375 0.425 2.110
H9 1.018 -0.514 -1.549
H10 -0.375 0.425 -2.110

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.47361.47361.07492.14822.14822.12702.14502.12702.1450
C21.47362.56912.20871.09902.76661.10211.09823.02913.4711
C31.47362.56912.20872.76661.09903.02913.47111.10211.0982
H41.07492.20872.20873.05213.05212.80102.44882.80102.4488
H52.14821.09902.76663.05212.50931.76711.77053.30133.7047
H62.14822.76661.09903.05212.50933.30133.70471.76711.7705
H72.12701.10213.02912.80101.76713.30131.77103.09884.0267
H82.14501.09823.47112.44881.77053.70471.77104.02674.2204
H92.12703.02911.10212.80103.30131.76713.09884.02671.7710
H102.14503.47111.09822.44883.70471.77054.02674.22041.7710

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 112.430 C1 C2 H7 110.515
C1 C2 H8 112.218 C1 C3 H6 112.430
C1 C3 H9 110.515 C1 C3 H10 112.218
C2 C1 C3 121.320 C2 C1 H4 119.325
C3 C1 H4 119.325 H5 C2 H7 106.802
H5 C2 H8 107.374 H6 C3 H9 106.802
H6 C3 H10 107.374 H7 C2 H8 107.201
H9 C3 H10 107.201
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability