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

using model chemistry: MP2=FULL/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 MP2=FULL/3-21G*
 hartrees
Energy at 0K-304.485841
Energy at 298.15K-304.492445
HF Energy-303.822771
Nuclear repulsion energy265.733026
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/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 3218 3051 0.14      
2 A1 3183 3017 5.43      
3 A1 3054 2895 4.45      
4 A1 1691 1603 24.33      
5 A1 1609 1525 29.77      
6 A1 1547 1466 10.05      
7 A1 1452 1376 1.57      
8 A1 1254 1189 3.26      
9 A1 979 928 2.34      
10 A1 860 816 5.37      
11 A1 745 706 2.45      
12 A1 514 487 0.92      
13 A2 1274 1208 0.00      
14 A2 1025 972 0.00      
15 A2 768 728 0.00      
16 A2 369 350 0.00      
17 B1 3078 2918 6.50      
18 B1 1037 983 2.44      
19 B1 999 947 15.41      
20 B1 869 824 51.77      
21 B1 593 562 33.75      
22 B1 305 289 1.56      
23 B1 118 112 0.45      
24 B2 3216 3049 19.76      
25 B2 3181 3016 11.02      
26 B2 1646 1560 3.68      
27 B2 1440 1365 11.41      
28 B2 1385 1313 5.45      
29 B2 1291 1224 23.26      
30 B2 1170 1109 29.00      
31 B2 982 931 10.63      
32 B2 586 556 2.02      
33 B2 438 415 10.43      

Unscaled Zero Point Vibrational Energy (zpe) 22936.3 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 21743.7 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 MP2=FULL/3-21G*
ABC
0.17285 0.08611 0.05810

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.126
C2 0.000 0.000 -1.857
C3 0.000 1.259 0.327
C4 0.000 -1.259 0.327
C5 0.000 1.266 -1.021
C6 0.000 -1.266 -1.021
O7 0.000 0.000 2.386
H8 0.000 2.184 0.897
H9 0.000 -2.184 0.897
H10 0.000 2.209 -1.565
H11 0.000 -2.209 -1.565
H12 0.880 0.000 -2.519
H13 -0.880 0.000 -2.519

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 H8 H9 H10 H11 H12 H13
C12.98261.49061.49062.49272.49271.26062.19572.19573.48163.48163.74913.7491
C22.98262.52092.52091.51731.51734.24333.51453.51452.22812.22811.10121.1012
C31.49062.52092.51751.34862.86272.41341.08633.48932.11783.95053.23393.2339
C41.49062.52092.51752.86271.34862.41343.48931.08633.95052.11783.23393.2339
C52.49271.51731.34862.86272.53283.63542.12623.94751.08833.51772.14962.1496
C62.49271.51732.86271.34862.53283.63543.94752.12623.51771.08832.14962.1496
O71.26064.24332.41342.41343.63543.63542.64342.64344.52724.52724.98334.9833
H82.19573.51451.08633.48932.12623.94752.64344.36742.46235.03574.14834.1483
H92.19573.51453.48931.08633.94752.12622.64344.36745.03572.46234.14834.1483
H103.48162.22812.11783.95051.08833.51774.52722.46235.03574.41792.56182.5618
H113.48162.22813.95052.11783.51771.08834.52725.03572.46234.41792.56182.5618
H123.74911.10123.23393.23392.14962.14964.98334.14834.14832.56182.56181.7606
H133.74911.10123.23393.23392.14962.14964.98334.14834.14832.56182.56181.7606

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 122.716 C1 C3 H8 115.987
C1 C4 C6 122.716 C1 C4 H9 115.987
C2 C5 C3 123.091 C2 C5 H10 116.587
C2 C6 C4 123.091 C2 C6 H11 116.587
C3 C1 C4 115.223 C3 C1 O7 122.389
C3 C5 H10 120.322 C4 C1 O7 122.389
C4 C6 H11 120.322 C5 C2 C6 113.165
C5 C2 H12 109.324 C5 C2 H13 109.324
C5 C3 H8 121.297 C6 C2 H12 109.324
C6 C2 H13 109.324 C6 C4 H9 121.297
H12 C2 H13 106.140
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability