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

using model chemistry: MP2/CEP-31G

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-31G
 hartrees
Energy at 0K-52.514332
Energy at 298.15K-52.520660
HF Energy-51.935218
Nuclear repulsion energy133.568485
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-31G
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 3191 3083 0.58      
2 A1 3143 3038 14.73      
3 A1 3014 2913 22.76      
4 A1 1660 1604 38.12      
5 A1 1538 1486 52.31      
6 A1 1485 1435 13.76      
7 A1 1393 1346 0.17      
8 A1 1198 1157 4.89      
9 A1 944 912 1.28      
10 A1 870 841 8.31      
11 A1 754 729 1.92      
12 A1 485 469 1.00      
13 A2 1195 1154 0.00      
14 A2 942 910 0.00      
15 A2 740 715 0.00      
16 A2 344 332 0.00      
17 B1 3063 2960 26.15      
18 B1 994 961 20.03      
19 B1 932 901 2.52      
20 B1 791 765 75.56      
21 B1 541 523 25.81      
22 B1 267 258 2.49      
23 B1 106 103 1.28      
24 B2 3189 3082 57.76      
25 B2 3143 3037 20.28      
26 B2 1616 1562 5.99      
27 B2 1414 1367 33.60      
28 B2 1389 1342 0.54      
29 B2 1295 1251 23.43      
30 B2 1151 1112 8.71      
31 B2 991 957 8.20      
32 B2 563 544 0.75      
33 B2 424 410 13.84      

Unscaled Zero Point Vibrational Energy (zpe) 22382.4 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 21628.1 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-31G
ABC
0.16550 0.08281 0.05577

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.136
C2 0.000 0.000 -1.891
C3 0.000 1.291 0.345
C4 0.000 -1.291 0.345
C5 0.000 1.292 -1.049
C6 0.000 -1.292 -1.049
O7 0.000 0.000 2.432
H8 0.000 2.228 0.923
H9 0.000 -2.228 0.923
H10 0.000 2.250 -1.596
H11 0.000 -2.250 -1.596
H12 0.890 0.000 -2.565
H13 -0.890 0.000 -2.565

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 H8 H9 H10 H11 H12 H13
C13.02751.51411.51412.53872.53871.29562.23822.23823.53993.53993.80683.8068
C23.02752.58272.58271.54181.54184.32323.58963.58962.26962.26961.11611.1161
C31.51412.58272.58251.39492.93542.45361.10063.56642.16584.03903.30613.3061
C41.51412.58272.58252.93541.39492.45363.56641.10064.03902.16583.30613.3061
C52.53871.54181.39492.93542.58323.71312.18354.03471.10383.58392.18112.1811
C62.53871.54182.93541.39492.58323.71314.03472.18353.58391.10382.18112.1811
O71.29564.32322.45362.45363.71313.71312.69082.69084.61424.61425.07565.0756
H82.23823.58961.10063.56642.18354.03472.69084.45612.51965.13854.23374.2337
H92.23823.58963.56641.10064.03472.18352.69084.45615.13852.51964.23374.2337
H103.53992.26962.16584.03901.10383.58394.61422.51965.13854.50062.60652.6065
H113.53992.26964.03902.16583.58391.10384.61425.13852.51964.50062.60652.6065
H123.80681.11613.30613.30612.18112.18115.07564.23374.23372.60652.60651.7795
H133.80681.11613.30613.30612.18112.18115.07564.23374.23372.60652.60651.7795

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 121.498 C1 C3 H8 116.858
C1 C4 C6 121.498 C1 C4 H9 116.858
C2 C5 C3 123.084 C2 C5 H10 117.194
C2 C6 C4 123.084 C2 C6 H11 117.194
C3 C1 C4 117.033 C3 C1 O7 121.483
C3 C5 H10 119.723 C4 C1 O7 121.483
C4 C6 H11 119.723 C5 C2 C6 113.803
C5 C2 H12 109.249 C5 C2 H13 109.249
C5 C3 H8 121.644 C6 C2 H12 109.249
C6 C2 H13 109.249 C6 C4 H9 121.644
H12 C2 H13 105.726
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability