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 CH3CHCH2CH3 (2-Butyl radical)

using model chemistry: MP2/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-157.263393
Energy at 298.15K-157.271944
Nuclear repulsion energy121.571884
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/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 3210 3078 23.64      
2 A 3157 3027 26.37      
3 A 3152 3023 17.19      
4 A 3151 3021 31.83      
5 A 3092 2965 22.13      
6 A 3061 2936 29.59      
7 A 3058 2933 19.97      
8 A 3006 2883 36.10      
9 A 2986 2864 35.07      
10 A 1495 1433 3.27      
11 A 1489 1428 6.71      
12 A 1476 1416 5.79      
13 A 1467 1407 6.07      
14 A 1458 1398 0.66      
15 A 1425 1366 2.25      
16 A 1395 1338 3.17      
17 A 1385 1328 0.66      
18 A 1301 1248 6.02      
19 A 1265 1213 0.21      
20 A 1186 1138 0.29      
21 A 1148 1101 0.14      
22 A 1070 1026 0.63      
23 A 1051 1008 0.96      
24 A 979 939 2.07      
25 A 962 922 1.02      
26 A 858 823 0.15      
27 A 764 732 0.70      
28 A 432 415 1.21      
29 A 395 379 20.89      
30 A 253 242 1.48      
31 A 243 233 0.36      
32 A 135 130 0.09      
33 A 70 67 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 25786.0 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 24728.7 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/aug-cc-pVDZ
ABC
0.87628 0.12102 0.11362

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVDZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.987 -0.047 -0.053
H2 2.088 -0.838 -0.817
H3 2.700 0.756 -0.292
H4 2.305 -0.495 0.910
C5 0.577 0.458 0.014
H6 0.401 1.490 0.333
C7 -0.568 -0.508 0.080
H8 -0.535 -1.061 1.044
H9 -0.439 -1.280 -0.702
C10 -1.938 0.165 -0.068
H11 -2.091 0.914 0.726
H12 -2.016 0.680 -1.039
H13 -2.756 -0.570 -0.003

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 C7 H8 H9 C10 H11 H12 H13
C11.10371.10051.10941.49872.24212.59922.93142.79693.93074.26154.18584.7713
H21.10371.78641.77392.15693.09652.82253.22382.56774.21634.78694.38134.9189
H31.10051.78641.77932.16552.49323.52373.94403.76384.68134.90094.77565.6221
H41.10941.77391.77932.16722.81082.99042.89953.27794.40454.62034.88385.1431
C51.49872.15692.16552.16721.09461.49972.14622.13652.53382.79922.80773.4878
H62.24213.09652.49322.81081.09462.23512.80933.07382.71822.58802.89493.7841
C72.59922.82253.52372.99041.49972.23511.11141.10631.53422.18172.18202.1903
H82.93143.22383.94402.89952.14622.80931.11141.76222.17002.53443.09212.5034
H92.79692.56773.76383.27792.13653.07381.10631.76222.17663.09532.53772.5221
C103.93074.21634.68134.40452.53382.71821.53422.17002.17661.10201.10141.1011
H114.26154.78694.90094.62032.79922.58802.18172.53443.09531.10201.78181.7813
H124.18584.38134.77564.88382.80772.89492.18203.09212.53771.10141.78181.7837
H134.77134.91895.62215.14313.48783.78412.19032.50342.52211.10111.78131.7837

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 118.843 C1 C5 C7 120.194
H2 C1 H3 108.286 H2 C1 H4 106.556
H2 C1 C5 111.041 H3 C1 H4 107.254
H3 C1 C5 111.938 H4 C1 C5 111.519
C5 C7 H8 109.668 C5 C7 H9 109.209
C5 C7 C10 113.266 H6 C5 C7 118.146
C7 C10 H11 110.638 C7 C10 H12 110.697
C7 C10 H13 111.375 H8 C7 H9 105.235
H8 C7 C10 109.174 H9 C7 C10 109.979
H11 C10 H12 107.928 H11 C10 H13 107.906
H12 C10 H13 108.169
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability