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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-304.528284
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 3050 0.19      
2 A1 3135 3013 5.85      
3 A1 3007 2890 9.28      
4 A1 1710 1643 60.00      
5 A1 1646 1582 50.43      
6 A1 1536 1476 7.81      
7 A1 1441 1385 0.95      
8 A1 1243 1194 4.18      
9 A1 972 934 2.20      
10 A1 845 813 3.57      
11 A1 733 704 2.41      
12 A1 509 490 1.30      
13 A2 1272 1222 0.00      
14 A2 1018 979 0.00      
15 A2 762 732 0.00      
16 A2 365 351 0.00      
17 B1 3027 2909 9.53      
18 B1 1034 994 1.54      
19 B1 987 949 17.83      
20 B1 860 826 53.22      
21 B1 589 566 28.75      
22 B1 304 292 1.33      
23 B1 116 111 0.68      
24 B2 3171 3047 20.80      
25 B2 3133 3011 13.23      
26 B2 1658 1594 1.92      
27 B2 1426 1371 9.16      
28 B2 1382 1328 5.69      
29 B2 1281 1231 22.67      
30 B2 1157 1112 29.41      
31 B2 969 931 10.05      
32 B2 580 558 1.43      
33 B2 437 420 10.95      

Unscaled Zero Point Vibrational Energy (zpe) 22738.6 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 21854.1 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 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