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All results from a given calculation for CH3CHCH2CH3 (2-Butyl radical)

using model chemistry: MP2/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-27.430602
Energy at 298.15K-27.439168
HF Energy-27.090174
Nuclear repulsion energy69.582157
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-121G
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 3115 3040 53.45      
2 A 3072 2998 51.36      
3 A 3067 2993 27.94      
4 A 3066 2993 55.83      
5 A 3011 2939 44.87      
6 A 2986 2914 28.78      
7 A 2964 2893 39.52      
8 A 2921 2851 56.53      
9 A 2909 2839 47.55      
10 A 1533 1496 4.13      
11 A 1529 1492 6.79      
12 A 1523 1486 6.04      
13 A 1512 1476 1.11      
14 A 1500 1464 8.44      
15 A 1455 1420 6.26      
16 A 1446 1412 2.73      
17 A 1425 1391 0.62      
18 A 1346 1313 5.90      
19 A 1276 1246 0.22      
20 A 1201 1173 0.31      
21 A 1144 1117 0.08      
22 A 1096 1070 1.24      
23 A 1025 1000 0.04      
24 A 999 975 1.31      
25 A 989 965 3.44      
26 A 841 821 0.12      
27 A 784 765 0.93      
28 A 443 433 27.69      
29 A 422 412 0.20      
30 A 260 254 1.02      
31 A 219 214 0.03      
32 A 123 120 0.10      
33 A 64 62 0.11      

Unscaled Zero Point Vibrational Energy (zpe) 25632.3 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 25017.2 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-121G
ABC
0.84751 0.11661 0.10986

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.025 -0.048 -0.082
H2 2.094 -0.812 -0.878
H3 2.718 0.772 -0.329
H4 2.388 -0.523 0.855
C5 0.590 0.459 0.057
H6 0.429 1.478 0.432
C7 -0.586 -0.520 0.117
H8 -0.594 -1.048 1.097
H9 -0.439 -1.302 -0.653
C10 -1.971 0.174 -0.101
H11 -2.151 0.941 0.673
H12 -2.002 0.664 -1.089
H13 -2.792 -0.562 -0.054

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 C7 H8 H9 C10 H11 H12 H13
C11.10541.10241.11091.52912.26792.66073.04192.82324.00294.35754.21254.8444
H21.10541.78931.78172.18003.11962.87323.34442.58924.25444.84694.35894.9606
H31.10241.78931.78562.18572.51393.57564.04023.79164.73314.97394.78255.6759
H41.11091.78171.78562.19912.83233.06423.03853.29774.51744.77274.94645.2592
C51.52912.18002.18572.19911.09721.53122.18112.16012.58192.84992.84163.5342
H62.26793.11962.51392.83231.09722.26242.80513.10792.78282.64572.98083.8430
C72.66072.87323.57563.06421.53122.26241.11321.10791.56512.21162.20562.2129
H83.04193.34444.04023.03852.18112.80511.11321.77572.19672.56053.11352.5274
H92.82322.58923.79163.29772.16013.10791.10791.77572.19853.11772.54992.5382
C104.00294.25444.73314.51742.58192.78281.56512.19672.19851.10411.10321.1035
H114.35754.84694.97394.77272.84992.64572.21162.56053.11771.10411.78981.7882
H124.21254.35894.78254.94642.84162.98082.20563.11352.54991.10321.78981.7888
H134.84444.96065.67595.25923.53423.84302.21292.52742.53821.10351.78821.7888

picture of 2-Butyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C5 H6 118.510 C1 C5 C7 120.790
H2 C1 H3 108.284 H2 C1 H4 107.016
H2 C1 C5 110.655 H3 C1 H4 107.565
H3 C1 C5 111.287 H4 C1 C5 111.846
C5 C7 H8 110.133 C5 C7 H9 108.809
C5 C7 C10 112.991 H6 C5 C7 117.861
C7 C10 H11 110.716 C7 C10 H12 110.301
C7 C10 H13 110.861 H8 C7 H9 106.159
H8 C7 C10 109.043 H9 C7 C10 109.475
H11 C10 H12 108.359 H11 C10 H13 108.199
H12 C10 H13 108.318
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability