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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-27.386461
Energy at 298.15K-27.394994
HF Energy-27.078320
Nuclear repulsion energy69.156147
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 3166 3060 77.27      
2 A 3134 3028 74.07      
3 A 3128 3022 50.30      
4 A 3126 3021 49.01      
5 A 3080 2977 57.48      
6 A 3060 2957 35.40      
7 A 3028 2926 43.33      
8 A 2992 2891 63.15      
9 A 2985 2884 48.25      
10 A 1532 1481 4.01      
11 A 1525 1474 8.83      
12 A 1525 1473 6.23      
13 A 1513 1462 1.30      
14 A 1504 1453 9.13      
15 A 1456 1407 8.68      
16 A 1449 1400 1.99      
17 A 1432 1384 0.54      
18 A 1345 1300 5.91      
19 A 1291 1247 0.02      
20 A 1205 1164 0.34      
21 A 1148 1109 0.08      
22 A 1104 1067 1.33      
23 A 1035 1000 0.29      
24 A 1010 976 1.25      
25 A 997 964 7.21      
26 A 849 820 0.09      
27 A 792 766 1.80      
28 A 451 436 39.00      
29 A 419 405 1.97      
30 A 254 246 1.21      
31 A 219 211 0.05      
32 A 119 115 0.24      
33 A 68 66 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 25969.7 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 25094.5 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
0.84150 0.11537 0.10844

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 2.039 -0.050 -0.065
H2 2.113 -0.874 -0.809
H3 2.737 0.759 -0.367
H4 2.396 -0.456 0.913
C5 0.591 0.467 0.026
H6 0.422 1.496 0.396
C7 -0.587 -0.525 0.098
H8 -0.572 -1.068 1.078
H9 -0.451 -1.303 -0.689
C10 -1.984 0.174 -0.083
H11 -2.148 0.935 0.711
H12 -2.038 0.684 -1.068
H13 -2.808 -0.570 -0.028

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 C7 H8 H9 C10 H11 H12 H13
C11.11261.11081.11801.54042.28412.67363.02632.85664.02884.37064.26194.8752
H21.11261.80341.79442.19423.15112.86983.28742.60264.29064.87244.44124.9924
H31.11081.80341.79782.20202.54713.59444.04703.81114.76595.00624.82725.7130
H41.11801.79441.79782.21372.82463.09373.03533.37554.53594.75714.98895.2905
C51.54042.19422.20202.21371.10611.54202.19412.17542.59342.86152.85563.5542
H62.28413.15112.54712.82461.10612.27872.83293.12662.78642.64912.97563.8575
C72.67362.86983.59443.09371.54202.27871.12001.11531.57222.22372.21972.2253
H83.02633.28744.04703.03532.19412.83291.12001.78712.20942.57493.13422.5442
H92.85662.60263.81113.37552.17543.12661.11531.78712.21333.13862.57082.5559
C104.02884.29064.76594.53592.59342.78641.57222.20942.21331.11201.11121.1116
H114.37064.87245.00624.75712.86152.64912.22372.57493.13861.11201.80041.8018
H124.26194.44124.82724.98892.85562.97562.21973.13422.57081.11121.80041.8020
H134.87524.99245.71305.29053.55423.85752.22532.54422.55591.11161.80181.8020

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 118.401 C1 C5 C7 120.311
H2 C1 H3 108.406 H2 C1 H4 107.117
H2 C1 C5 110.555 H3 C1 H4 107.536
H3 C1 C5 111.279 H4 C1 C5 111.772
C5 C7 H8 110.008 C5 C7 H9 108.841
C5 C7 C10 112.762 H6 C5 C7 117.806
C7 C10 H11 110.712 C7 C10 H12 110.445
C7 C10 H13 110.857 H8 C7 H9 106.160
H8 C7 C10 109.144 H9 C7 C10 109.712
H11 C10 H12 108.161 H11 C10 H13 108.249
H12 C10 H13 108.324
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability