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All results from a given calculation for C4H8 (cyclobutane)

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

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-pVDZ
 hartrees
Energy at 0K-156.776779
Energy at 298.15K 
HF Energy-156.111061
Nuclear repulsion energy125.880403
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-pVDZ
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/aug-cc-pVDZ
ABC
0.35027 0.35027 0.20925

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

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.088 0.145
C2 0.000 -1.088 0.145
C3 -1.088 0.000 -0.145
C4 1.088 0.000 -0.145
H5 0.000 1.370 1.214
H6 0.000 2.003 -0.472
H7 0.000 -1.370 1.214
H8 0.000 -2.003 -0.472
H9 -1.370 0.000 -1.214
H10 -2.003 0.000 0.472
H11 1.370 0.000 -1.214
H12 2.003 0.000 0.472

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C12.17591.56571.56571.10561.10382.68023.15232.21522.30312.21522.3031
C22.17591.56571.56572.68023.15231.10561.10382.21522.30312.21522.3031
C31.56571.56572.17592.21522.30312.21522.30311.10561.10382.68023.1523
C41.56571.56572.17592.21522.30312.21522.30312.68023.15231.10561.1038
H51.10562.68022.21522.21521.80082.73973.77103.10622.53803.10622.5380
H61.10383.15232.30312.30311.80083.77104.00702.53802.98622.53802.9862
H72.68021.10562.21522.21522.73973.77101.80083.10622.53803.10622.5380
H83.15231.10382.30312.30313.77104.00701.80082.53802.98622.53802.9862
H92.21522.21521.10562.68023.10622.53803.10622.53801.80082.73973.7710
H102.30312.30311.10383.15232.53802.98622.53802.98621.80083.77104.0070
H112.21522.21522.68021.10563.10622.53803.10622.53802.73973.77101.8008
H122.30312.30313.15231.10382.53802.98622.53802.98623.77104.00701.8008

picture of cyclobutane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C2 88.034 C1 C3 H9 110.872
C1 C3 H10 118.222 C1 C4 C2 88.034
C1 C4 H11 110.872 C1 C4 H12 118.222
C2 C3 H9 110.872 C2 C3 H10 118.222
C2 C4 H11 110.872 C2 C4 H12 118.222
C3 C1 C4 88.034 C3 C1 H5 110.872
C3 C1 H6 118.222 C3 C2 C4 88.034
C3 C2 H7 110.872 C3 C2 H8 118.222
C4 C1 H5 110.872 C4 C1 H6 118.222
C4 C2 H7 110.872 C4 C2 H8 118.222
H5 C1 H6 109.186 H7 C2 H8 109.186
H9 C3 H10 109.186 H11 C4 H12 109.186
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability