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: CCSD/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD/TZVP
 hartrees
Energy at 0K-306.686884
Energy at 298.15K 
HF Energy-305.636294
Nuclear repulsion energy268.763414
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 CCSD/TZVP
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 3235 3087 0.11      
2 A1 3197 3052 7.16      
3 A1 3048 2909 14.25      
4 A1 1789 1707 250.22      
5 A1 1721 1642 10.62      
6 A1 1476 1409 10.44      
7 A1 1437 1371 1.67      
8 A1 1212 1157 5.63      
9 A1 965 921 2.90      
10 A1 892 852 5.81      
11 A1 774 739 3.37      
12 A1 504 481 1.94      
13 A2 1202 1147 0.00      
14 A2 895 854 0.00      
15 A2 709 677 0.00      
16 A2 283 270 0.00      
17 B1 3071 2931 8.89      
18 B1 979 935 26.19      
19 B1 911 869 1.05      
20 B1 670 639 60.86      
21 B1 491 468 1.28      
22 B1 100 96 0.35      
23 B1 319i 305i 0.48      
24 B2 3233 3085 15.99      
25 B2 3196 3051 13.81      
26 B2 1696 1618 0.92      
27 B2 1443 1378 29.51      
28 B2 1414 1349 3.89      
29 B2 1298 1238 28.53      
30 B2 1160 1107 9.24      
31 B2 1006 960 4.88      
32 B2 578 552 0.41      
33 B2 458 437 13.48      

Unscaled Zero Point Vibrational Energy (zpe) 22360.3 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 21340.7 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 CCSD/TZVP
ABC
0.17400 0.08921 0.05961

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.113
C2 0.000 0.000 -1.824
C3 0.000 1.260 0.330
C4 0.000 -1.260 0.330
C5 0.000 1.258 -1.007
C6 0.000 -1.258 -1.007
O7 0.000 0.000 2.333
H8 0.000 2.179 0.904
H9 0.000 -2.179 0.904
H10 0.000 2.196 -1.553
H11 0.000 -2.196 -1.553
H12 0.872 0.000 -2.489
H13 -0.872 0.000 -2.489

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 H8 H9 H10 H11 H12 H13
C12.93761.48351.48352.46582.46581.21952.18872.18873.45413.45413.70683.7068
C22.93762.49592.49591.49961.49964.15713.49133.49132.21242.21241.09691.0969
C31.48352.49592.52001.33792.85112.36591.08303.48612.10303.93563.20923.2092
C41.48352.49592.52002.85111.33792.36593.48611.08303.93562.10303.20923.2092
C52.46581.49961.33792.85112.51543.56932.12173.93221.08513.49622.13032.1303
C62.46581.49962.85111.33792.51543.56933.93222.12173.49621.08512.13032.1303
O71.21954.15712.36592.36593.56933.56932.60542.60544.46334.46334.90054.9005
H82.18873.49131.08303.48612.12173.93222.60544.35732.45705.01714.12574.1257
H92.18873.49133.48611.08303.93222.12172.60544.35735.01712.45704.12574.1257
H103.45412.21242.10303.93561.08513.49624.46332.45705.01714.39152.54142.5414
H113.45412.21243.93562.10303.49621.08514.46335.01712.45704.39152.54142.5414
H123.70681.09693.20923.20922.13032.13034.90054.12574.12572.54142.54141.7444
H133.70681.09693.20923.20922.13032.13034.90054.12574.12572.54142.54141.7444

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 121.761 C1 C3 H8 116.160
C1 C4 C6 121.761 C1 C4 H9 116.160
C2 C5 C3 123.097 C2 C5 H10 116.825
C2 C6 C4 123.097 C2 C6 H11 116.825
C3 C1 C4 116.281 C3 C1 O7 121.860
C3 C5 H10 120.078 C4 C1 O7 121.860
C4 C6 H11 120.078 C5 C2 C6 114.004
C5 C2 H12 109.284 C5 C2 H13 109.284
C5 C3 H8 122.079 C6 C2 H12 109.284
C6 C2 H13 109.284 C6 C4 H9 122.079
H12 C2 H13 105.340
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability