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 C6H6O (2,5-Cyclohexadienone)

using model chemistry: CCSD/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD/cc-pVTZ
 hartrees
Energy at 0K-306.849865
Energy at 298.15K 
HF Energy-305.646975
Nuclear repulsion energy269.241850
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 CCSD/cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at CCSD/cc-pVTZ
ABC
0.17480 0.08947 0.05982

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.112
C2 0.000 0.000 -1.821
C3 0.000 1.257 0.331
C4 0.000 -1.257 0.331
C5 0.000 1.255 -1.006
C6 0.000 -1.255 -1.006
O7 0.000 0.000 2.329
H8 0.000 2.175 0.902
H9 0.000 -2.175 0.902
H10 0.000 2.192 -1.549
H11 0.000 -2.192 -1.549
H12 0.868 0.000 -2.489
H13 -0.868 0.000 -2.489

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 H8 H9 H10 H11 H12 H13
C12.93341.48031.48032.46212.46211.21692.18482.18483.44763.44763.70473.7047
C22.93342.49212.49211.49601.49604.15033.48483.48482.20882.20881.09541.0954
C31.48032.49212.51431.33692.84532.36101.08083.47902.09913.92793.20723.2072
C41.48032.49212.51432.84531.33692.36103.47901.08083.92792.09913.20723.2072
C52.46211.49601.33692.84532.50903.56352.11843.92431.08313.48892.12772.1277
C62.46211.49602.84531.33692.50903.56353.92432.11843.48891.08312.12772.1277
O71.21694.15032.36102.36103.56353.56352.60112.60114.45464.45464.89604.8960
H82.18483.48481.08083.47902.11843.92432.60114.34932.45095.00734.12114.1211
H92.18483.48483.47901.08083.92432.11842.60114.34935.00732.45094.12114.1211
H103.44762.20882.09913.92791.08313.48894.45462.45095.00734.38392.53822.5382
H113.44762.20883.92792.09913.48891.08314.45465.00732.45094.38392.53822.5382
H123.70471.09543.20723.20722.12772.12774.89604.12114.12112.53822.53821.7360
H133.70471.09543.20723.20722.12772.12774.89604.12114.12112.53822.53821.7360

picture of 2,5-Cyclohexadienone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C5 121.758 C1 C3 H8 116.219
C1 C4 C6 121.758 C1 C4 H9 116.219
C2 C5 C3 123.119 C2 C5 H10 116.929
C2 C6 C4 123.119 C2 C6 H11 116.929
C3 C1 C4 116.258 C3 C1 O7 121.871
C3 C5 H10 119.952 C4 C1 O7 121.871
C4 C6 H11 119.952 C5 C2 C6 113.987
C5 C2 H12 109.408 C5 C2 H13 109.408
C5 C3 H8 122.022 C6 C2 H12 109.408
C6 C2 H13 109.408 C6 C4 H9 122.022
H12 C2 H13 104.821
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability