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All results from a given calculation for C6H6O (2,5-Cyclohexadienone)

using model chemistry: CCD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-304.510269
Energy at 298.15K-304.516866
HF Energy-303.824020
Nuclear repulsion energy265.722711
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 CCD/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3183 3044 0.22      
2 A1 3146 3009 5.56      
3 A1 3017 2886 9.36      
4 A1 1752 1676 49.33      
5 A1 1689 1616 10.30      
6 A1 1543 1476 7.91      
7 A1 1450 1387 1.67      
8 A1 1250 1195 2.03      
9 A1 978 935 1.43      
10 A1 851 814 4.80      
11 A1 740 708 2.04      
12 A1 512 490 0.99      
13 A2 1275 1220 0.00      
14 A2 1022 978 0.00      
15 A2 761 728 0.00      
16 A2 369 353 0.00      
17 B1 3037 2905 10.25      
18 B1 1039 993 2.12      
19 B1 992 949 16.63      
20 B1 864 826 50.38      
21 B1 590 564 31.31      
22 B1 308 295 1.58      
23 B1 115 110 0.77      
24 B2 3180 3041 21.48      
25 B2 3144 3007 12.66      
26 B2 1683 1610 1.63      
27 B2 1434 1372 9.22      
28 B2 1388 1328 5.90      
29 B2 1292 1236 23.10      
30 B2 1167 1116 25.08      
31 B2 975 933 9.15      
32 B2 586 560 1.06      
33 B2 444 425 11.35      

Unscaled Zero Point Vibrational Energy (zpe) 22887.8 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 21892.2 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CCD/3-21G*
ABC
0.17145 0.08656 0.05814

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.129
C2 0.000 0.000 -1.857
C3 0.000 1.265 0.328
C4 0.000 -1.265 0.328
C5 0.000 1.271 -1.017
C6 0.000 -1.271 -1.017
O7 0.000 0.000 2.374
H8 0.000 2.190 0.903
H9 0.000 -2.190 0.903
H10 0.000 2.214 -1.565
H11 0.000 -2.214 -1.565
H12 0.884 0.000 -2.519
H13 -0.884 0.000 -2.519

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 H8 H9 H10 H11 H12 H13
C12.98661.49761.49762.49382.49381.24492.20202.20203.48713.48713.75363.7536
C22.98662.52562.52561.52391.52394.23153.52383.52382.23352.23351.10381.1038
C31.49762.52562.53091.34472.87082.40561.08893.50332.11743.96123.23863.2386
C41.49762.52562.53092.87081.34472.40563.50331.08893.96122.11743.23863.2386
C52.49381.52391.34472.87082.54183.62092.12823.95781.09103.52802.15722.1572
C62.49381.52392.87081.34472.54183.62093.95782.12823.52801.09102.15722.1572
O71.24494.23152.40562.40563.62093.62092.63862.63864.51854.51854.97224.9722
H82.20203.52381.08893.50332.12823.95782.63864.38072.46775.04874.15784.1578
H92.20203.52383.50331.08893.95782.12822.63864.38075.04872.46774.15784.1578
H103.48712.23352.11743.96121.09103.52804.51852.46775.04874.42842.56792.5679
H113.48712.23353.96122.11743.52801.09104.51855.04872.46774.42842.56792.5679
H123.75361.10383.23863.23862.15722.15724.97224.15784.15782.56792.56791.7673
H133.75361.10383.23863.23862.15722.15724.97224.15784.15782.56792.56791.7673

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 122.564 C1 C3 H8 115.817
C1 C4 C6 122.564 C1 C4 H9 115.817
C2 C5 C3 123.260 C2 C5 H10 116.344
C2 C6 C4 123.260 C2 C6 H11 116.344
C3 C1 C4 115.336 C3 C1 O7 122.332
C3 C5 H10 120.396 C4 C1 O7 122.332
C4 C6 H11 120.396 C5 C2 C6 113.015
C5 C2 H12 109.312 C5 C2 H13 109.312
C5 C3 H8 121.619 C6 C2 H12 109.312
C6 C2 H13 109.312 C6 C4 H9 121.619
H12 C2 H13 106.361
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability