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

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-304.521723
Energy at 298.15K-304.528301
HF Energy-303.822720
Nuclear repulsion energy265.267283
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 QCISD/3-21G
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 3174 3076 0.19      
2 A1 3135 3038 5.85      
3 A1 3007 2914 9.28      
4 A1 1710 1657 60.00      
5 A1 1646 1595 50.42      
6 A1 1536 1488 7.81      
7 A1 1441 1397 0.95      
8 A1 1243 1204 4.18      
9 A1 972 942 2.20      
10 A1 845 819 3.57      
11 A1 733 710 2.41      
12 A1 509 494 1.30      
13 A2 1272 1232 0.00      
14 A2 1018 987 0.00      
15 A2 762 739 0.00      
16 A2 365 354 0.00      
17 B1 3027 2934 9.53      
18 B1 1034 1002 1.54      
19 B1 987 957 17.83      
20 B1 860 833 53.22      
21 B1 589 571 28.75      
22 B1 304 295 1.33      
23 B1 116 112 0.68      
24 B2 3171 3073 20.80      
25 B2 3133 3037 13.23      
26 B2 1658 1607 1.92      
27 B2 1426 1382 9.16      
28 B2 1382 1339 5.69      
29 B2 1281 1241 22.67      
30 B2 1157 1121 29.41      
31 B2 969 939 10.05      
32 B2 580 563 1.43      
33 B2 437 424 10.95      

Unscaled Zero Point Vibrational Energy (zpe) 22738.6 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 22038.3 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 QCISD/3-21G
ABC
0.17124 0.08613 0.05793

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.130
C2 0.000 0.000 -1.861
C3 0.000 1.266 0.328
C4 0.000 -1.266 0.328
C5 0.000 1.272 -1.019
C6 0.000 -1.272 -1.019
O7 0.000 0.000 2.382
H8 0.000 2.191 0.903
H9 0.000 -2.191 0.903
H10 0.000 2.216 -1.568
H11 0.000 -2.216 -1.568
H12 0.884 0.000 -2.522
H13 -0.884 0.000 -2.522

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 H8 H9 H10 H11 H12 H13
C12.99031.49851.49852.49722.49721.25242.20292.20293.49093.49093.75753.7575
C22.99032.52862.52861.52491.52494.24273.52713.52712.23482.23481.10431.1043
C31.49852.52862.53231.34762.87362.41281.08923.50482.12063.96463.24193.2419
C41.49852.52862.53232.87361.34762.41283.50481.08923.96462.12063.24193.2419
C52.49721.52491.34762.87362.54373.63152.13113.96101.09163.53032.15822.1582
C62.49721.52492.87361.34762.54373.63153.96102.13113.53031.09162.15822.1582
O71.25244.24272.41282.41283.63153.63152.64362.64364.52914.52914.98354.9835
H82.20293.52711.08923.50482.13113.96102.64364.38242.47145.05244.16144.1614
H92.20293.52713.50481.08923.96102.13112.64364.38245.05242.47144.16144.1614
H103.49092.23482.12063.96461.09163.53034.52912.47145.05244.43112.56922.5692
H113.49092.23483.96462.12063.53031.09164.52915.05242.47144.43112.56922.5692
H123.75751.10433.24193.24192.15822.15824.98354.16144.16142.56922.56921.7682
H133.75751.10433.24193.24192.15822.15824.98354.16144.16142.56922.56921.7682

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 122.578 C1 C3 H8 115.799
C1 C4 C6 122.578 C1 C4 H9 115.799
C2 C5 C3 123.239 C2 C5 H10 116.345
C2 C6 C4 123.239 C2 C6 H11 116.345
C3 C1 C4 115.330 C3 C1 O7 122.335
C3 C5 H10 120.416 C4 C1 O7 122.335
C4 C6 H11 120.416 C5 C2 C6 113.036
C5 C2 H12 109.303 C5 C2 H13 109.303
C5 C3 H8 121.624 C6 C2 H12 109.303
C6 C2 H13 109.303 C6 C4 H9 121.624
H12 C2 H13 106.373
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability