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: B2PLYP=FULL/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B2PLYP=FULL/6-31G
 hartrees
Energy at 0K-306.927386
Energy at 298.15K-306.934049
HF Energy-306.701107
Nuclear repulsion energy266.850326
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 B2PLYP=FULL/6-31G
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 3235 3235 0.04      
2 A1 3197 3197 7.96      
3 A1 3021 3021 11.05      
4 A1 1721 1721 72.34      
5 A1 1622 1622 103.79      
6 A1 1509 1509 17.67      
7 A1 1447 1447 0.06      
8 A1 1234 1234 7.44      
9 A1 988 988 5.35      
10 A1 894 894 8.48      
11 A1 784 784 0.74      
12 A1 516 516 2.91      
13 A2 1235 1235 0.00      
14 A2 1018 1018 0.00      
15 A2 765 765 0.00      
16 A2 368 368 0.00      
17 B1 3039 3039 10.57      
18 B1 1041 1041 2.44      
19 B1 982 982 12.17      
20 B1 838 838 57.43      
21 B1 588 588 22.32      
22 B1 310 310 3.25      
23 B1 129 129 1.11      
24 B2 3233 3233 23.62      
25 B2 3196 3196 17.11      
26 B2 1670 1670 5.61      
27 B2 1449 1449 26.89      
28 B2 1407 1407 2.92      
29 B2 1321 1321 28.66      
30 B2 1184 1184 11.50      
31 B2 1016 1016 8.25      
32 B2 597 597 1.16      
33 B2 450 450 14.73      

Unscaled Zero Point Vibrational Energy (zpe) 22999.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 22999.7 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 B2PLYP=FULL/6-31G
ABC
0.17373 0.08731 0.05873

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.107
C2 0.000 0.000 -1.839
C3 0.000 1.258 0.333
C4 0.000 -1.258 0.333
C5 0.000 1.262 -1.018
C6 0.000 -1.262 -1.018
O7 0.000 0.000 2.369
H8 0.000 2.177 0.910
H9 0.000 -2.177 0.910
H10 0.000 2.203 -1.563
H11 0.000 -2.203 -1.563
H12 0.871 0.000 -2.515
H13 -0.871 0.000 -2.515

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 H8 H9 H10 H11 H12 H13
C12.94611.47661.47662.47142.47141.26242.18542.18543.46153.46153.72493.7249
C22.94612.50992.50991.50571.50574.20863.50643.50642.21982.21981.10241.1024
C31.47662.50992.51501.35092.85882.39341.08513.48212.11883.94573.23253.2325
C41.47662.50992.51502.85881.35092.39343.48211.08513.94572.11883.23253.2325
C52.47141.50571.35092.85882.52403.61482.13383.94211.08733.50722.14282.1428
C62.47141.50572.85881.35092.52403.61483.94212.13383.50721.08732.14282.1428
O71.26244.20862.39342.39343.61483.61482.62052.62054.50764.50764.96114.9611
H82.18543.50641.08513.48212.13383.94212.62054.35302.47355.02934.15014.1501
H92.18543.50643.48211.08513.94212.13382.62054.35305.02932.47354.15014.1501
H103.46152.21982.11883.94571.08733.50724.50762.47355.02934.40522.55252.5525
H113.46152.21983.94572.11883.50721.08734.50765.02932.47354.40522.55252.5525
H123.72491.10243.23253.23252.14282.14284.96114.15014.15012.55252.55251.7425
H133.72491.10243.23253.23252.14282.14284.96114.15014.15012.55252.55251.7425

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 121.804 C1 C3 H8 116.265
C1 C4 C6 121.804 C1 C4 H9 116.265
C2 C5 C3 122.862 C2 C5 H10 116.839
C2 C6 C4 122.862 C2 C6 H11 116.839
C3 C1 C4 116.774 C3 C1 O7 121.613
C3 C5 H10 120.299 C4 C1 O7 121.613
C4 C6 H11 120.299 C5 C2 C6 113.894
C5 C2 H12 109.522 C5 C2 H13 109.522
C5 C3 H8 121.931 C6 C2 H12 109.522
C6 C2 H13 109.522 C6 C4 H9 121.931
H12 C2 H13 104.430
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability