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 CH3CH2CH2CH3 (Butane)

using model chemistry: QCISD(T)/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Anti 1Ag
Energy calculated at QCISD(T)/Def2TZVPP
 hartrees
Energy at 0K-158.156466
Energy at 298.15K 
HF Energy-157.359360
Nuclear repulsion energy130.707393
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 QCISD(T)/Def2TZVPP
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/Def2TZVPP
ABC
0.78060 0.12164 0.11414

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/Def2TZVPP

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.424 0.636 0.000
C2 0.424 -0.636 0.000
C3 0.424 1.907 0.000
C4 -0.424 -1.907 0.000
H5 -1.080 0.630 0.877
H6 -1.080 0.630 -0.877
H7 1.080 -0.630 0.877
H8 1.080 -0.630 -0.877
H9 -0.197 2.805 0.000
H10 1.068 1.944 0.883
H11 1.068 1.944 -0.883
H12 0.197 -2.805 0.000
H13 -1.068 -1.944 0.883
H14 -1.068 -1.944 -0.883

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12 H13 H14
C11.52861.52832.54291.09561.09562.15262.15262.18142.17182.17183.49672.80152.8015
C21.52862.54291.52832.15262.15261.09561.09563.49672.80152.80152.18142.17182.1718
C31.52832.54293.90732.15992.15992.76302.76301.09211.09321.09324.71784.22324.2232
C42.54291.52833.90732.76302.76302.15992.15994.71784.22324.22321.09211.09321.0932
H51.09562.15262.15992.76301.75482.50043.05482.50682.51853.07253.76812.57343.1177
H61.09562.15262.15992.76301.75483.05482.50042.50683.07252.51853.76813.11772.5734
H72.15261.09562.76302.15992.50043.05481.75483.76812.57343.11772.50682.51853.0725
H82.15261.09562.76302.15993.05482.50041.75483.76813.11772.57342.50683.07252.5185
H92.18143.49671.09214.71782.50682.50683.76813.76811.76681.76685.62444.90844.9084
H102.17182.80151.09324.22322.51853.07252.57343.11771.76681.76544.90844.43594.7743
H112.17182.80151.09324.22323.07252.51853.11772.57341.76681.76544.90844.77434.4359
H123.49672.18144.71781.09213.76813.76812.50682.50685.62444.90844.90841.76681.7668
H132.80152.17184.22321.09322.57343.11772.51853.07254.90844.43594.77431.76681.7654
H142.80152.17184.22321.09323.11772.57343.07252.51854.90844.77434.43591.76681.7654

picture of Butane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 112.577 C1 C2 H7 109.118
C1 C2 H8 109.118 C1 C3 H9 111.622
C1 C3 H11 110.789 C1 C3 H12 30.955
C2 C1 C3 112.577 C2 C1 H5 109.118
C2 C1 H6 109.118 C2 C4 H10 17.329
C2 C4 H13 110.789 C2 C4 H14 110.789
C3 C1 H5 109.704 C3 C1 H6 109.704
C4 C2 H7 109.704 C4 C2 H8 109.704
H5 C1 H6 106.429 H7 C2 H8 106.429
H9 C3 H11 107.901 H9 C3 H12 142.577
H10 C4 H13 94.017 H10 C4 H14 114.051
H11 C3 H12 93.552 H13 C4 H14 107.685
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability