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All results from a given calculation for C4H8 (cyclobutane)

using model chemistry: G3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at G3
 hartrees
Energy at 0K-157.040515
Energy at 298.15K-157.035323
HF Energy-156.097201
Nuclear repulsion energy127.533950
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 HF/6-31G*
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/6-31G*
ABC
0.35964 0.35964 0.21539

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.071 0.148
C2 0.000 -1.071 0.148
C3 -1.071 0.000 -0.148
C4 1.071 0.000 -0.148
H5 0.000 1.344 1.207
H6 0.000 1.987 -0.451
H7 0.000 -1.344 1.207
H8 0.000 -1.987 -0.451
H9 -1.344 0.000 -1.207
H10 -1.987 0.000 0.451
H11 1.344 0.000 -1.207
H12 1.987 0.000 0.451

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.14241.54341.54341.09421.09352.63713.11582.18832.27722.18832.2772
C22.14241.54341.54342.63713.11581.09421.09352.18832.27722.18832.2772
C31.54341.54342.14242.18832.27722.18832.27721.09421.09352.63713.1158
C41.54341.54342.14242.18832.27722.18832.27722.63713.11581.09421.0935
H51.09422.63712.18832.18831.77822.68713.72003.07262.51483.07262.5148
H61.09353.11582.27722.27721.77823.72003.97322.51482.95052.51482.9505
H72.63711.09422.18832.18832.68713.72001.77823.07262.51483.07262.5148
H83.11581.09352.27722.27723.72003.97321.77822.51482.95052.51482.9505
H92.18832.18831.09422.63713.07262.51483.07262.51481.77822.68713.7200
H102.27722.27721.09353.11582.51482.95052.51482.95051.77823.72003.9732
H112.18832.18832.63711.09423.07262.51483.07262.51482.68713.72001.7782
H122.27722.27723.11581.09352.51482.95052.51482.95053.72003.97321.7782

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 88.531 C1 C3 H9 111.686
C1 C3 H10 117.697 C1 C4 C2 88.531
C1 C4 H11 111.686 C1 C4 H12 117.697
C2 C3 H9 111.686 C2 C3 H10 117.697
C2 C4 H11 111.686 C2 C4 H12 117.697
C3 C1 C4 88.531 C3 C1 H5 111.686
C3 C1 H6 117.697 C3 C2 C4 88.531
C3 C2 H7 111.686 C3 C2 H8 117.697
C4 C1 H5 111.686 C4 C1 H6 117.697
C4 C2 H7 111.686 C4 C2 H8 117.697
H5 C1 H6 108.465 H7 C2 H8 108.465
H9 C3 H10 108.465 H11 C4 H12 108.465
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability