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All results from a given calculation for C4H8 (cyclobutane)

using model chemistry: QCISD(T)/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at QCISD(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-156.924557
Energy at 298.15K 
HF Energy-156.150554
Nuclear repulsion energy127.000049
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)/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/aug-cc-pVTZ
ABC
0.35635 0.35635 0.21264

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

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.080 0.143
C2 0.000 -1.080 0.143
C3 -1.080 0.000 -0.143
C4 1.080 0.000 -0.143
H5 0.000 1.360 1.200
H6 0.000 1.984 -0.467
H7 0.000 -1.360 1.200
H8 0.000 -1.984 -0.467
H9 -1.360 0.000 -1.200
H10 -1.984 0.000 0.467
H11 1.360 0.000 -1.200
H12 1.984 0.000 0.467

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.15941.55361.55361.09301.09112.65863.12382.19522.28172.19522.2817
C22.15941.55361.55362.65863.12381.09301.09112.19522.28172.19522.2817
C31.55361.55362.15942.19522.28172.19522.28171.09301.09112.65863.1238
C41.55361.55362.15942.19522.28172.19522.28172.65863.12381.09301.0911
H51.09302.65862.19522.19521.78002.72013.73643.07512.51423.07512.5142
H61.09113.12382.28172.28171.78003.73643.96762.51422.95722.51422.9572
H72.65861.09302.19522.19522.72013.73641.78003.07512.51423.07512.5142
H83.12381.09112.28172.28173.73643.96761.78002.51422.95722.51422.9572
H92.19522.19521.09302.65863.07512.51423.07512.51421.78002.72013.7364
H102.28172.28171.09113.12382.51422.95722.51422.95721.78003.73643.9676
H112.19522.19522.65861.09303.07512.51423.07512.51422.72013.73641.7800
H122.28172.28173.12381.09112.51422.95722.51422.95723.73643.96761.7800

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 88.051 C1 C3 H9 110.887
C1 C3 H10 118.207 C1 C4 C2 88.051
C1 C4 H11 110.887 C1 C4 H12 118.207
C2 C3 H9 110.887 C2 C3 H10 118.207
C2 C4 H11 110.887 C2 C4 H12 118.207
C3 C1 C4 88.051 C3 C1 H5 110.887
C3 C1 H6 118.207 C3 C2 C4 88.051
C3 C2 H7 110.887 C3 C2 H8 118.207
C4 C1 H5 110.887 C4 C1 H6 118.207
C4 C2 H7 110.887 C4 C2 H8 118.207
H5 C1 H6 109.177 H7 C2 H8 109.177
H9 C3 H10 109.177 H11 C4 H12 109.177
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability