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All results from a given calculation for CH3CHCH2CH3 (2-Butyl 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 C1 1A
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-27.615247
Energy at 298.15K-27.623829
HF Energy-27.145192
Nuclear repulsion energy70.039516
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 3214 3051 44.37      
2 A 3186 3025 44.72      
3 A 3180 3019 4.89      
4 A 3180 3019 56.69      
5 A 3133 2974 34.34      
6 A 3114 2957 25.68      
7 A 3084 2928 33.11      
8 A 3046 2892 41.11      
9 A 3037 2883 37.52      
10 A 1531 1453 4.21      
11 A 1527 1449 7.55      
12 A 1518 1441 8.49      
13 A 1509 1433 3.76      
14 A 1505 1429 5.82      
15 A 1463 1389 2.62      
16 A 1444 1371 6.10      
17 A 1427 1355 0.19      
18 A 1328 1261 6.56      
19 A 1300 1234 0.01      
20 A 1206 1145 0.33      
21 A 1159 1100 0.06      
22 A 1098 1043 1.30      
23 A 1063 1009 0.27      
24 A 999 948 1.68      
25 A 992 941 5.88      
26 A 869 825 0.10      
27 A 775 736 1.59      
28 A 440 418 27.25      
29 A 421 400 12.87      
30 A 258 245 1.59      
31 A 238 226 0.07      
32 A 134 127 0.16      
33 A 77 73 0.16      

Unscaled Zero Point Vibrational Energy (zpe) 26225.5 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 24898.4 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
0.86132 0.11919 0.11192

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.004 -0.051 -0.057
H2 2.092 -0.853 -0.814
H3 2.716 0.752 -0.314
H4 2.323 -0.485 0.915
C5 0.580 0.468 0.010
H6 0.412 1.490 0.376
C7 -0.574 -0.514 0.089
H8 -0.543 -1.050 1.064
H9 -0.441 -1.291 -0.689
C10 -1.953 0.166 -0.074
H11 -2.109 0.925 0.714
H12 -2.023 0.672 -1.053
H13 -2.771 -0.574 -0.006

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 C7 H8 H9 C10 H11 H12 H13
C11.10581.10411.11131.51702.25752.62292.95632.81293.96294.29694.21084.8032
H21.10581.79341.78232.17003.11852.83493.24152.57364.23674.81094.39514.9373
H31.10411.79341.78742.17922.51573.54823.97073.77934.71204.93644.79735.6531
H41.11131.78231.78742.18282.80063.01242.92493.29564.43704.65544.90935.1769
C51.51702.17002.17922.18281.09831.51712.16192.15032.55242.81712.81933.5087
H62.25753.11852.51572.80061.09832.25132.79883.09712.74712.60542.93933.8118
C72.62292.83493.54823.01241.51712.25131.11261.10751.54662.19522.19362.1996
H82.95633.24153.97072.92492.16192.79881.11261.77232.18202.54453.10422.5164
H92.81292.57363.77933.29562.15033.09711.10751.77232.18833.10842.54732.5316
C103.96294.23674.71204.43702.55242.74711.54662.18202.18831.10511.10441.1047
H114.29694.81094.93644.65542.81712.60542.19522.54453.10841.10511.78761.7893
H124.21084.39514.79734.90932.81932.93932.19363.10422.54731.10441.78761.7910
H134.80324.93735.65315.17693.50873.81182.19962.51642.53161.10471.78931.7910

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 118.480 C1 C5 C7 119.650
H2 C1 H3 108.496 H2 C1 H4 107.009
H2 C1 C5 110.687 H3 C1 H4 107.576
H3 C1 C5 111.521 H4 C1 C5 111.372
C5 C7 H8 109.640 C5 C7 H9 109.035
C5 C7 C10 112.835 H6 C5 C7 117.931
C7 C10 H11 110.658 C7 C10 H12 110.569
C7 C10 H13 111.029 H8 C7 H9 105.934
H8 C7 C10 109.193 H9 C7 C10 109.971
H11 C10 H12 108.005 H11 C10 H13 108.142
H12 C10 H13 108.334
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability