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 CH3CHCHCH2 (methylallyl radical)

using model chemistry: MP2/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A"
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-26.421614
Energy at 298.15K-26.427936
HF Energy-25.978254
Nuclear repulsion energy59.897179
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/CEP-31G*
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' 3318 3150 17.70      
2 A' 3216 3053 9.62      
3 A' 3212 3050 26.44      
4 A' 3202 3040 17.52      
5 A' 3183 3022 17.02      
6 A' 3072 2916 37.54      
7 A' 1552 1474 10.02      
8 A' 1538 1460 0.03      
9 A' 1504 1428 14.47      
10 A' 1448 1374 2.22      
11 A' 1361 1292 0.27      
12 A' 1320 1253 1.80      
13 A' 1193 1132 0.14      
14 A' 1158 1099 0.18      
15 A' 995 945 6.53      
16 A' 900 855 4.53      
17 A' 506 480 0.61      
18 A' 288 273 0.11      
19 A" 3149 2989 27.16      
20 A" 1500 1424 9.60      
21 A" 1073 1019 36.82      
22 A" 1046 993 19.99      
23 A" 795 754 39.86      
24 A" 715 679 47.20      
25 A" 548 520 15.91      
26 A" 227 216 2.69      
27 A" 153 145 0.99      

Unscaled Zero Point Vibrational Energy (zpe) 21084.5 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 20017.7 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/CEP-31G*
ABC
1.23006 0.13061 0.12077

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.388 -1.420 0.000
C2 0.145 -0.756 0.000
C3 0.000 0.640 0.000
C4 -1.341 1.347 0.000
H5 2.324 -0.854 0.000
H6 1.451 -2.512 0.000
H7 -0.768 -1.366 0.000
H8 0.908 1.256 0.000
H9 -2.170 0.620 0.000
H10 -1.448 1.997 0.890
H11 -1.448 1.997 -0.890

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11
C11.40922.48383.88621.09431.09332.15632.71864.10114.52874.5287
C21.40921.40322.57492.18112.18811.09762.15152.69293.30253.3025
C32.48381.40321.51592.76223.46932.14721.09712.17012.17482.1748
C43.88622.57491.51594.27454.76272.77252.25051.10321.10691.1069
H51.09432.18112.76224.27451.87413.13382.54034.72924.81054.8105
H61.09332.18813.46934.76271.87412.49723.80634.78715.43335.4333
H72.15631.09762.14722.77253.13382.49723.11112.43053.54403.5440
H82.71862.15151.09712.25052.54033.80633.11113.14292.62502.6250
H94.10112.69292.17011.10324.72924.78712.43053.14291.79161.7916
H104.52873.30252.17481.10694.81055.43333.54402.62501.79161.7796
H114.52873.30252.17481.10694.81055.43333.54402.62501.79161.7796

picture of methylallyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 124.054 C1 C2 H7 118.140
C2 C1 H5 120.679 C2 C1 H6 121.428
C2 C3 C4 123.749 C2 C3 H8 118.224
C3 C2 H7 117.807 C3 C4 H9 110.924
C3 C4 H10 111.072 C3 C4 H11 111.072
C4 C3 H8 118.027 H5 C1 H6 117.893
H9 C4 H10 108.315 H9 C4 H11 108.315
H10 C4 H11 106.995
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability