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: MP2=FULL/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 MP2=FULL/6-31G**
 hartrees
Energy at 0K-118.076912
Energy at 298.15K-118.083272
HF Energy-117.647317
Nuclear repulsion energy75.686136
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 MP2=FULL/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' 3284 3068 28.47      
2 A' 3223 3011 19.61      
3 A' 3169 2961 45.72      
4 A' 3082 2880 27.65      
5 A' 1558 1455 3.42      
6 A' 1547 1446 10.90      
7 A' 1473 1376 2.92      
8 A' 1224 1144 2.28      
9 A' 1085 1014 0.09      
10 A' 921 860 1.43      
11 A' 459 429 19.06      
12 A' 370 346 3.64      
13 A' 166 155 0.08      
14 A" 3223 3012 18.58      
15 A" 3169 2961 4.32      
16 A" 3080 2878 24.53      
17 A" 1548 1447 0.36      
18 A" 1536 1435 1.19      
19 A" 1477 1380 7.27      
20 A" 1422 1328 3.35      
21 A" 1196 1118 0.00      
22 A" 976 912 0.81      
23 A" 967 904 0.42      
24 A" 136 127 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 20144.4 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 18822.9 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 MP2=FULL/6-31G**
ABC
1.24677 0.28082 0.25084

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.015 0.544 0.000
C2 -0.015 -0.200 1.290
C3 -0.015 -0.200 -1.290
H4 0.332 1.568 0.000
H5 -0.759 -0.996 1.281
H6 -0.759 -0.996 -1.281
H7 0.953 -0.676 1.484
H8 -0.228 0.454 2.133
H9 0.953 -0.676 -1.484
H10 -0.228 0.454 -2.133

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.48921.48921.08052.13732.13732.15122.14562.15122.1456
C21.48922.58002.21531.09022.79251.09561.08772.97643.4914
C31.48922.58002.21532.79251.09022.97643.49141.09561.0877
H41.08052.21532.21533.06683.06682.76062.47072.76062.4707
H52.13731.09022.79253.06682.56181.75311.76383.26773.7470
H62.13732.79251.09023.06682.56183.26773.74701.75311.7638
H72.15121.09562.97642.76061.75313.26771.75792.96853.9692
H82.14561.08773.49142.47071.76383.74701.75793.96924.2661
H92.15122.97641.09562.76063.26771.75312.96853.96921.7579
H102.14563.49141.08772.47073.74701.76383.96924.26611.7579

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 110.971 C1 C2 H7 111.760
C1 C2 H8 111.794 C1 C3 H6 110.971
C1 C3 H9 111.760 C1 C3 H10 111.794
C2 C1 C3 120.048 C2 C1 H4 118.240
C3 C1 H4 118.240 H5 C2 H7 106.655
H5 C2 H8 108.165 H6 C3 H9 106.655
H6 C3 H10 108.165 H7 C2 H8 107.253
H9 C3 H10 107.253
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability