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: B2PLYP=FULLultrafine/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 2A
Energy calculated at B2PLYP=FULLultrafine/aug-cc-pVDZ
 hartrees
Energy at 0K-118.341097
Energy at 298.15K 
HF Energy-118.197431
Nuclear repulsion energy75.203043
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 B2PLYP=FULLultrafine/aug-cc-pVDZ
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' 3209 3088 25.28      
2 A' 3126 3009 17.64      
3 A' 3050 2935 49.96      
4 A' 2979 2866 49.55      
5 A' 1476 1420 4.53      
6 A' 1464 1409 12.97      
7 A' 1398 1345 4.01      
8 A' 1177 1133 1.82      
9 A' 1013 975 0.06      
10 A' 898 864 1.91      
11 A' 387 373 7.30      
12 A' 335 322 18.77      
13 A' 121 116 1.56      
14 A" 3128 3010 27.18      
15 A" 3051 2936 5.54      
16 A" 2975 2863 26.81      
17 A" 1463 1408 0.19      
18 A" 1453 1398 1.24      
19 A" 1413 1360 9.15      
20 A" 1358 1307 1.18      
21 A" 1161 1117 0.06      
22 A" 936 900 0.41      
23 A" 931 896 0.36      
24 A" 108 104 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 19303.7 cm-1
Scaled (by 0.9623) Zero Point Vibrational Energy (zpe) 18576.0 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 B2PLYP=FULLultrafine/aug-cc-pVDZ
ABC
1.23268 0.27778 0.24785

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.010 0.541 0.000
C2 -0.010 -0.199 1.297
C3 -0.010 -0.199 -1.297
H4 0.212 1.608 0.000
H5 -0.794 -0.974 1.316
H6 -0.794 -0.974 -1.316
H7 0.948 -0.728 1.468
H8 -0.169 0.470 2.151
H9 0.948 -0.728 -1.468
H10 -0.169 0.470 -2.151

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10
C11.49331.49331.09002.15442.15442.16392.15862.16392.1586
C21.49332.59342.23581.10242.83521.10761.09752.97303.5162
C31.49332.59342.23582.83521.10242.97303.51621.10761.0975
H41.09002.23582.23583.06793.06792.85542.46372.85542.4637
H52.15441.10242.83523.06792.63101.76631.78193.29273.8074
H62.15442.83521.10243.06792.63103.29273.80741.76631.7819
H72.16391.10762.97302.85541.76633.29271.77552.93513.9727
H82.15861.09753.51622.46371.78193.80741.77553.97274.3030
H92.16392.97301.10762.85543.29271.76632.93513.97271.7755
H102.15863.51621.09752.46373.80741.78193.97274.30301.7755

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 111.309 C1 C2 H7 111.749
C1 C2 H8 111.943 C1 C3 H6 111.309
C1 C3 H9 111.749 C1 C3 H10 111.943
C2 C1 C3 120.532 C2 C1 H4 119.050
C3 C1 H4 119.050 H5 C2 H7 106.113
H5 C2 H8 108.192 H6 C3 H9 106.113
H6 C3 H10 108.192 H7 C2 H8 107.251
H9 C3 H10 107.251
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability