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: QCISD/aug-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 QCISD/aug-cc-pVTZ
 hartrees
Energy at 0K-306.873004
Energy at 298.15K 
HF Energy-305.649899
Nuclear repulsion energy269.102073
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/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at QCISD/aug-cc-pVTZ
ABC
0.17464 0.08941 0.05978

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.110
C2 0.000 0.000 -1.821
C3 0.000 1.258 0.331
C4 0.000 -1.258 0.331
C5 0.000 1.255 -1.007
C6 0.000 -1.255 -1.007
O7 0.000 0.000 2.331
H8 0.000 2.175 0.904
H9 0.000 -2.175 0.904
H10 0.000 2.193 -1.551
H11 0.000 -2.193 -1.551
H12 0.869 0.000 -2.489
H13 -0.869 0.000 -2.489

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 H8 H9 H10 H11 H12 H13
C12.93071.47951.47952.46112.46111.22092.18482.18483.44803.44803.70283.7028
C22.93072.49232.49231.49581.49584.15163.48673.48672.20962.20961.09641.0964
C31.47952.49232.51551.33792.84692.36261.08183.48042.10123.93043.20793.2079
C41.47952.49232.51552.84691.33792.36263.48041.08183.93042.10123.20793.2079
C52.46111.49581.33792.84692.51033.56612.12123.92681.08403.49082.12782.1278
C62.46111.49582.84691.33792.51033.56613.92682.12123.49081.08402.12782.1278
O71.22094.15162.36262.36263.56613.56612.60122.60124.45834.45834.89804.8980
H82.18483.48671.08183.48042.12123.92682.60124.35022.45515.01074.12354.1235
H92.18483.48673.48041.08183.92682.12122.60124.35025.01072.45514.12354.1235
H103.44802.20962.10123.93041.08403.49084.45832.45515.01074.38602.53872.5387
H113.44802.20963.93042.10123.49081.08404.45835.01072.45514.38602.53872.5387
H123.70281.09643.20793.20792.12782.12784.89804.12354.12352.53872.53871.7376
H133.70281.09643.20793.20792.12782.12784.89804.12354.12352.53872.53871.7376

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 121.665 C1 C3 H8 116.218
C1 C4 C6 121.665 C1 C4 H9 116.218
C2 C5 C3 123.065 C2 C5 H10 116.943
C2 C6 C4 123.065 C2 C6 H11 116.943
C3 C1 C4 116.449 C3 C1 O7 121.776
C3 C5 H10 119.992 C4 C1 O7 121.776
C4 C6 H11 119.992 C5 C2 C6 114.091
C5 C2 H12 109.377 C5 C2 H13 109.377
C5 C3 H8 122.117 C6 C2 H12 109.377
C6 C2 H13 109.377 C6 C4 H9 122.117
H12 C2 H13 104.832
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability