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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: HF/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at HF/Def2TZVPP
 hartrees
Energy at 0K-379.383391
Energy at 298.15K-379.388241
HF Energy-379.383391
Nuclear repulsion energy325.938355
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 HF/Def2TZVPP
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 3363 3048 0.00      
2 Ag 1983 1797 0.00      
3 Ag 1835 1663 0.00      
4 Ag 1258 1141 0.00      
5 Ag 814 737 0.00      
6 Ag 482 437 0.00      
7 Au 1132 1026 0.00      
8 Au 377 342 0.00      
9 B1g 834 756 0.00      
10 B1u 3342 3029 1.37      
11 B1u 1963 1779 742.04      
12 B1u 1501 1361 4.34      
13 B1u 1026 930 15.19      
14 B1u 802 727 0.15      
15 B2g 1122 1017 0.00      
16 B2g 878 796 0.00      
17 B2g 244 222 0.00      
18 B2u 3361 3046 4.02      
19 B2u 1811 1642 10.22      
20 B2u 1424 1291 102.46      
21 B2u 1170 1060 43.06      
22 B2u 451 409 34.35      
23 B3g 3342 3029 0.00      
24 B3g 1522 1380 0.00      
25 B3g 1335 1210 0.00      
26 B3g 646 586 0.00      
27 B3g 489 444 0.00      
28 B3u 1005 911 103.53      
29 B3u 566 513 2.60      
30 B3u 96 87 17.72      

Unscaled Zero Point Vibrational Energy (zpe) 20086.6 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 18206.5 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 HF/Def2TZVPP
ABC
0.17479 0.05696 0.04296

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.430
C2 0.000 0.000 -1.430
C3 0.000 1.270 0.659
C4 0.000 -1.270 0.659
C5 0.000 -1.270 -0.659
C6 0.000 1.270 -0.659
O7 0.000 0.000 2.618
O8 0.000 0.000 -2.618
H9 0.000 2.172 1.239
H10 0.000 -2.172 1.239
H11 0.000 -2.172 -1.239
H12 0.000 2.172 -1.239

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.86091.48621.48622.44512.44511.18764.04852.18072.18073.44153.4415
C22.86092.44512.44511.48621.48624.04851.18763.44153.44152.18072.1807
C31.48622.44512.54022.86171.31772.33493.51441.07253.49093.93082.1011
C41.48622.44512.54021.31772.86172.33493.51443.49091.07252.10113.9308
C52.44511.48622.86171.31772.54023.51442.33493.93082.10111.07253.4909
C62.44511.48621.31772.86172.54023.51442.33492.10113.93083.49091.0725
O71.18764.04852.33492.33493.51443.51445.23612.57322.57324.42654.4265
O84.04851.18763.51443.51442.33492.33495.23614.42654.42652.57322.5732
H92.18073.44151.07253.49093.93082.10112.57324.42654.34465.00132.4775
H102.18073.44153.49091.07252.10113.93082.57324.42654.34462.47755.0013
H113.44152.18073.93082.10111.07253.49094.42652.57325.00132.47754.3446
H123.44152.18072.10113.93083.49091.07254.42652.57322.47755.00134.3446

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.280 C1 C3 H9 115.985
C1 C4 C5 121.280 C1 C4 H10 115.985
C2 C5 C4 121.280 C2 C5 H11 115.985
C2 C6 C3 121.280 C2 C6 H12 115.985
C3 C1 C4 117.440 C3 C1 O7 121.280
C3 C6 H12 122.735 C4 C1 O7 121.280
C4 C5 H11 122.735 C5 C2 C6 117.440
C5 C2 O8 121.280 C5 C4 H10 122.735
C6 C2 O8 121.280 C6 C3 H9 122.735
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.404      
2 C 0.404      
3 C -0.126      
4 C -0.126      
5 C -0.126      
6 C -0.126      
7 O -0.392      
8 O -0.392      
9 H 0.120      
10 H 0.120      
11 H 0.120      
12 H 0.120      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -45.883 0.000 0.000
y 0.000 -37.401 0.000
z 0.000 0.000 -63.544
Traceless
 xyz
x 4.590 0.000 0.000
y 0.000 17.313 0.000
z 0.000 0.000 -21.902
Polar
3z2-r2-43.805
x2-y2-8.482
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.736 0.000 0.000
y 0.000 8.882 0.000
z 0.000 0.000 15.875


<r2> (average value of r2) Å2
<r2> 239.218
(<r2>)1/2 15.467