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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: CID/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 CID/6-31G
 hartrees
Energy at 0K-379.696719
Energy at 298.15K-379.701306
Nuclear repulsion energy321.182223
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 CID/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 3317 3102 0.00      
2 Ag 1837 1718 0.00      
3 Ag 1732 1620 0.00      
4 Ag 1247 1166 0.00      
5 Ag 806 754 0.00      
6 Ag 477 446 0.00      
7 Au 1033 966 0.00      
8 Au 364 340 0.00      
9 B1g 780 729 0.00      
10 B1u 3294 3080 0.12      
11 B1u 1794 1678 293.04      
12 B1u 1462 1368 2.05      
13 B1u 998 934 12.17      
14 B1u 791 740 1.59      
15 B2g 1017 951 0.00      
16 B2g 734 687 0.00      
17 B2g 231 216 0.00      
18 B2u 3314 3099 6.31      
19 B2u 1754 1640 13.29      
20 B2u 1399 1308 68.06      
21 B2u 1146 1072 52.97      
22 B2u 425 397 34.79      
23 B3g 3293 3080 0.00      
24 B3g 1475 1380 0.00      
25 B3g 1320 1235 0.00      
26 B3g 640 598 0.00      
27 B3g 484 453 0.00      
28 B3u 908 849 120.09      
29 B3u 518 484 2.84      
30 B3u 94 88 18.48      

Unscaled Zero Point Vibrational Energy (zpe) 19341.2 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 18087.9 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 CID/6-31G
ABC
0.17383 0.05482 0.04168

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.440
C2 0.000 0.000 -1.440
C3 0.000 1.273 0.671
C4 0.000 -1.273 0.671
C5 0.000 -1.273 -0.671
C6 0.000 1.273 -0.671
O7 0.000 0.000 2.680
O8 0.000 0.000 -2.680
H9 0.000 2.184 1.254
H10 0.000 -2.184 1.254
H11 0.000 -2.184 -1.254
H12 0.000 2.184 -1.254

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.88061.48731.48732.46512.46511.23984.12042.19192.19193.46813.4681
C22.88062.46512.46511.48731.48734.12041.23983.46813.46812.19192.1919
C31.48732.46512.54552.87731.34152.37853.58441.08183.50553.95632.1294
C41.48732.46512.54551.34152.87732.37853.58443.50551.08182.12943.9563
C52.46511.48732.87731.34152.54553.58442.37853.95632.12941.08183.5055
C62.46511.48731.34152.87732.54553.58442.37852.12943.95633.50551.0818
O71.23984.12042.37852.37853.58443.58445.36022.60842.60844.49954.4995
O84.12041.23983.58443.58442.37852.37855.36024.49954.49952.60842.6084
H92.19193.46811.08183.50553.95632.12942.60844.49954.36785.03652.5077
H102.19193.46813.50551.08182.12943.95632.60844.49954.36782.50775.0365
H113.46812.19193.95632.12941.08183.50554.49952.60845.03652.50774.3678
H123.46812.19192.12943.95633.50551.08184.49952.60842.50775.03654.3678

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.159 C1 C3 H9 116.225
C1 C4 C5 121.159 C1 C4 H10 116.225
C2 C5 C4 121.159 C2 C5 H11 116.225
C2 C6 C3 121.159 C2 C6 H12 116.225
C3 C1 C4 117.682 C3 C1 O7 121.159
C3 C6 H12 122.616 C4 C1 O7 121.159
C4 C5 H11 122.616 C5 C2 C6 117.682
C5 C2 O8 121.159 C5 C4 H10 122.616
C6 C2 O8 121.159 C6 C3 H9 122.616
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability