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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: MP3=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP3=FULL/6-31G*
 hartrees
Energy at 0K-380.378063
Energy at 298.15K-380.382445
HF Energy-379.232106
Nuclear repulsion energy322.557872
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 MP3=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 Ag 3271 3070 0.00      
2 Ag 1848 1734 0.00      
3 Ag 1738 1630 0.00      
4 Ag 1202 1128 0.00      
5 Ag 798 748 0.00      
6 Ag 461 433 0.00      
7 Au 981 920 0.00      
8 Au 332 311 0.00      
9 B1g 756 710 0.00      
10 B1u 3254 3053 0.46      
11 B1u 1846 1733 242.27      
12 B1u 1423 1335 6.53      
13 B1u 973 913 9.57      
14 B1u 776 728 0.49      
15 B2g 975 915 0.00      
16 B2g 727 682 0.00      
17 B2g 206 193 0.00      
18 B2u 3269 3068 3.59      
19 B2u 1714 1609 15.46      
20 B2u 1376 1292 82.34      
21 B2u 1121 1052 41.32      
22 B2u 422 396 29.82      
23 B3g 3254 3053 0.00      
24 B3g 1456 1366 0.00      
25 B3g 1286 1207 0.00      
26 B3g 620 581 0.00      
27 B3g 461 433 0.00      
28 B3u 894 839 94.79      
29 B3u 512 481 2.80      
30 B3u 92 87 13.77      

Unscaled Zero Point Vibrational Energy (zpe) 19023.3 cm-1
Scaled (by 0.9383) Zero Point Vibrational Energy (zpe) 17849.5 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 MP3=FULL/6-31G*
ABC
0.17438 0.05542 0.04205

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.450
C2 0.000 0.000 -1.450
C3 0.000 1.271 0.671
C4 0.000 -1.271 0.671
C5 0.000 -1.271 -0.671
C6 0.000 1.271 -0.671
O7 0.000 0.000 2.667
O8 0.000 0.000 -2.667
H9 0.000 2.184 1.260
H10 0.000 -2.184 1.260
H11 0.000 -2.184 -1.260
H12 0.000 2.184 -1.260

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.90091.49121.49122.47302.47301.21624.11712.19262.19263.48103.4810
C22.90092.47302.47301.49121.49124.11711.21623.48103.48102.19262.1926
C31.49122.47302.54242.87471.34172.36633.57141.08663.50533.95832.1358
C41.49122.47302.54241.34172.87472.36633.57143.50531.08662.13583.9583
C52.47301.49122.87471.34172.54243.57142.36633.95832.13581.08663.5053
C62.47301.49121.34172.87472.54243.57142.36632.13583.95833.50531.0866
O71.21624.11712.36632.36633.57143.57145.33332.59802.59804.49324.4932
O84.11711.21623.57143.57142.36632.36635.33334.49324.49322.59802.5980
H92.19263.48101.08663.50533.95832.13582.59804.49324.36855.04322.5199
H102.19263.48103.50531.08662.13583.95832.59804.49324.36852.51995.0432
H113.48102.19263.95832.13581.08663.50534.49322.59805.04322.51994.3685
H123.48102.19262.13583.95833.50531.08664.49322.59802.51995.04324.3685

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.521 C1 C3 H9 115.648
C1 C4 C5 121.521 C1 C4 H10 115.648
C2 C5 C4 121.521 C2 C5 H11 115.648
C2 C6 C3 121.521 C2 C6 H12 115.648
C3 C1 C4 116.958 C3 C1 O7 121.521
C3 C6 H12 122.831 C4 C1 O7 121.521
C4 C5 H11 122.831 C5 C2 C6 116.958
C5 C2 O8 121.521 C5 C4 H10 122.831
C6 C2 O8 121.521 C6 C3 H9 122.831
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability