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: MP2=FULL/STO-3G

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=FULL/STO-3G
 hartrees
Energy at 0K-302.108227
Energy at 298.15K-302.114399
HF Energy-301.688563
Nuclear repulsion energy261.869636
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=FULL/STO-3G
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 3511 3121 0.26      
2 A1 3488 3100 6.56      
3 A1 3366 2992 1.19      
4 A1 1814 1612 13.66      
5 A1 1694 1506 1.03      
6 A1 1685 1498 1.08      
7 A1 1528 1359 0.00      
8 A1 1280 1138 0.25      
9 A1 996 885 0.18      
10 A1 949 844 0.34      
11 A1 781 694 2.76      
12 A1 503 447 0.01      
13 A2 1337 1189 0.00      
14 A2 1081 961 0.00      
15 A2 768 683 0.00      
16 A2 386 343 0.00      
17 B1 3460 3075 0.89      
18 B1 1087 966 0.01      
19 B1 1065 947 1.38      
20 B1 847 753 20.75      
21 B1 593 527 6.38      
22 B1 294 262 0.58      
23 B1 98 87 0.22      
24 B2 3510 3120 0.89      
25 B2 3487 3100 0.94      
26 B2 1773 1576 0.51      
27 B2 1540 1369 1.38      
28 B2 1510 1342 11.65      
29 B2 1330 1182 38.06      
30 B2 1220 1084 9.50      
31 B2 1074 954 2.47      
32 B2 602 536 0.26      
33 B2 438 389 6.38      

Unscaled Zero Point Vibrational Energy (zpe) 24548.7 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 21821.3 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=FULL/STO-3G
ABC
0.16674 0.08380 0.05636

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.150
C2 0.000 0.000 -1.879
C3 0.000 1.288 0.323
C4 0.000 -1.288 0.323
C5 0.000 1.284 -1.032
C6 0.000 -1.284 -1.032
O7 0.000 0.000 2.424
H8 0.000 2.237 0.882
H9 0.000 -2.237 0.882
H10 0.000 2.236 -1.589
H11 0.000 -2.236 -1.589
H12 0.886 0.000 -2.549
H13 -0.886 0.000 -2.549

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 H8 H9 H10 H11 H12 H13
C13.02871.53041.53042.53182.53181.27402.25312.25313.53583.53583.80363.8036
C23.02872.55072.55071.53781.53784.30263.55363.55362.25452.25451.11111.1111
C31.53042.55072.57551.35532.90682.46411.10193.56902.13444.00903.26983.2698
C41.53042.55072.57552.90681.35532.46413.56901.10194.00902.13443.26983.2698
C52.53181.53781.35532.90682.56773.68692.13874.00781.10303.56352.17582.1758
C62.53181.53782.90681.35532.56773.68694.00782.13873.56351.10302.17582.1758
O71.27404.30262.46412.46413.68693.68692.71692.71694.59394.59395.05125.0512
H82.25313.55361.10193.56902.13874.00782.71694.47432.47155.11044.19094.1909
H92.25313.55363.56901.10194.00782.13872.71694.47435.11042.47154.19094.1909
H103.53582.25452.13444.00901.10303.56354.59392.47155.11044.47172.58952.5895
H113.53582.25454.00902.13443.56351.10304.59395.11042.47154.47172.58952.5895
H123.80361.11113.26983.26982.17582.17585.05124.19094.19092.58952.58951.7723
H133.80361.11113.26983.26982.17582.17585.05124.19094.19092.58952.58951.7723

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 122.541 C1 C3 H8 116.794
C1 C4 C6 122.541 C1 C4 H9 116.794
C2 C5 C3 123.564 C2 C5 H10 116.271
C2 C6 C4 123.564 C2 C6 H11 116.271
C3 C1 C4 114.587 C3 C1 O7 122.706
C3 C5 H10 120.164 C4 C1 O7 122.706
C4 C6 H11 120.164 C5 C2 C6 113.201
C5 C2 H12 109.394 C5 C2 H13 109.394
C5 C3 H8 120.665 C6 C2 H12 109.394
C6 C2 H13 109.394 C6 C4 H9 120.665
H12 C2 H13 105.795
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability