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/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/cc-pVDZ
 hartrees
Energy at 0K-157.236739
Energy at 298.15K 
HF Energy-156.682244
Nuclear repulsion energy121.571335
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/cc-pVDZ
Rotational Constants (cm-1) from geometry optimized at MP2/cc-pVDZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVDZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.985 -0.048 -0.066
H2 2.075 -0.844 -0.826
H3 2.694 0.756 -0.322
H4 2.322 -0.489 0.896
C5 0.577 0.457 0.024
H6 0.410 1.477 0.392
C7 -0.570 -0.506 0.097
H8 -0.552 -1.039 1.074
H9 -0.433 -1.297 -0.666
C10 -1.935 0.165 -0.083
H11 -2.099 0.930 0.695
H12 -1.998 0.664 -1.064
H13 -2.757 -0.566 -0.016

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 C7 H8 H9 C10 H11 H12 H13
C11.10451.10191.11041.49792.23882.60052.95202.78683.92554.26724.16714.7700
H21.10451.78761.77532.15803.10472.82153.24772.55344.20104.78314.34934.9068
H31.10191.78761.78012.16592.49943.52463.96293.75654.67294.90274.75155.6174
H41.11041.77531.78012.16792.78823.00062.93163.26874.41714.64764.88225.1609
C51.49792.15802.16592.16791.09711.49952.14802.13832.53132.79902.80333.4876
H62.23883.10472.49942.78821.09712.23162.77823.08612.72872.58552.92933.7909
C72.60052.82153.52463.00061.49952.23161.11301.10741.53192.18132.18122.1905
H82.95203.24773.96292.93162.14802.77821.11301.76342.16862.53283.09282.5048
H92.78682.55343.75653.26872.13833.08611.10741.76342.17573.09642.54032.5211
C103.92554.20104.67294.41712.53132.72871.53192.16862.17571.10341.10271.1023
H114.26724.78314.90274.64762.79902.58552.18132.53283.09641.10341.78221.7829
H124.16714.34934.75154.88222.80332.92932.18123.09282.54031.10271.78221.7859
H134.77004.90685.61745.16093.48763.79092.19052.50482.52111.10231.78291.7859

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 118.437 C1 C5 C7 120.362
H2 C1 H3 108.227 H2 C1 H4 106.551
H2 C1 C5 111.140 H3 C1 H4 107.151
H3 C1 C5 111.941 H4 C1 C5 111.575
C5 C7 H8 109.721 C5 C7 H9 109.290
C5 C7 C10 113.232 H6 C5 C7 117.667
C7 C10 H11 110.685 C7 C10 H12 110.719
C7 C10 H13 111.483 H8 C7 H9 105.153
H8 C7 C10 109.127 H9 C7 C10 110.004
H11 C10 H12 107.770 H11 C10 H13 107.866
H12 C10 H13 108.180
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability