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

using model chemistry: MP2/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-52.595299
Energy at 298.15K 
HF Energy-51.954051
Nuclear repulsion energy134.543437
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 MP2/CEP-121G
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 3153 3077 0.02      
2 A1 3113 3038 12.66      
3 A1 2955 2885 17.76      
4 A1 1645 1606 40.75      
5 A1 1533 1496 53.80      
6 A1 1485 1449 12.89      
7 A1 1393 1359 0.09      
8 A1 1201 1172 6.37      
9 A1 951 928 2.14      
10 A1 863 843 7.98      
11 A1 749 731 2.42      
12 A1 490 478 1.37      
13 A2 1166 1138 0.00      
14 A2 859 838 0.00      
15 A2 714 697 0.00      
16 A2 302 294 0.00      
17 B1 2997 2925 17.45      
18 B1 986 963 21.46      
19 B1 874 853 1.70      
20 B1 709 692 74.16      
21 B1 486 474 8.62      
22 B1 116 114 0.05      
23 B1 36i 35i 2.82      
24 B2 3150 3074 40.06      
25 B2 3111 3036 22.33      
26 B2 1598 1560 5.03      
27 B2 1411 1377 29.24      
28 B2 1383 1350 2.05      
29 B2 1290 1259 20.88      
30 B2 1154 1126 10.77      
31 B2 985 961 9.02      
32 B2 569 556 1.02      
33 B2 424 414 13.02      

Unscaled Zero Point Vibrational Energy (zpe) 21889.5 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 21364.1 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 MP2/CEP-121G
ABC
0.16774 0.08409 0.05660

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.126
C2 0.000 0.000 -1.877
C3 0.000 1.282 0.339
C4 0.000 -1.282 0.339
C5 0.000 1.284 -1.039
C6 0.000 -1.284 -1.039
O7 0.000 0.000 2.416
H8 0.000 2.210 0.917
H9 0.000 -2.210 0.917
H10 0.000 2.236 -1.582
H11 0.000 -2.236 -1.582
H12 0.883 0.000 -2.547
H13 -0.883 0.000 -2.547

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 H8 H9 H10 H11 H12 H13
C13.00241.50361.50362.51682.51681.29052.22012.22013.51173.51173.77773.7777
C23.00242.55982.55981.53341.53344.29293.56223.56222.25582.25581.10891.1089
C31.50362.55982.56311.37802.91242.44051.09373.53922.14534.00833.27943.2794
C41.50362.55982.56312.91241.37802.44053.53921.09374.00832.14533.27943.2794
C52.51681.53341.37802.91242.56853.68602.16384.00451.09623.56242.16912.1691
C62.51681.53342.91241.37802.56853.68604.00452.16383.56241.09622.16912.1691
O71.29054.29292.44052.44053.68603.68602.67072.67074.58104.58105.04155.0415
H82.22013.56221.09373.53922.16384.00452.67074.42042.49885.10074.20314.2031
H92.22013.56223.53921.09374.00452.16382.67074.42045.10072.49884.20314.2031
H103.51172.25582.14534.00831.09623.56244.58102.49885.10074.47302.59112.5911
H113.51172.25584.00832.14533.56241.09624.58105.10072.49884.47302.59112.5911
H123.77771.10893.27943.27942.16912.16915.04154.20314.20312.59112.59111.7663
H133.77771.10893.27943.27942.16912.16915.04154.20314.20312.59112.59111.7663

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 121.651 C1 C3 H8 116.578
C1 C4 C6 121.651 C1 C4 H9 116.578
C2 C5 C3 123.010 C2 C5 H10 117.183
C2 C6 C4 123.010 C2 C6 H11 117.183
C3 C1 C4 116.924 C3 C1 O7 121.538
C3 C5 H10 119.806 C4 C1 O7 121.538
C4 C6 H11 119.806 C5 C2 C6 113.753
C5 C2 H12 109.296 C5 C2 H13 109.296
C5 C3 H8 121.772 C6 C2 H12 109.296
C6 C2 H13 109.296 C6 C4 H9 121.772
H12 C2 H13 105.581
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability