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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: HF/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-379.266642
Energy at 298.15K-379.271527
Nuclear repulsion energy324.726610
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/cc-pVDZ
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 3384 3072 0.00      
2 Ag 2011 1826 0.00      
3 Ag 1851 1680 0.00      
4 Ag 1242 1127 0.00      
5 Ag 823 747 0.00      
6 Ag 482 437 0.00      
7 Au 1127 1023 0.00      
8 Au 378 343 0.00      
9 B1g 834 758 0.00      
10 B1u 3362 3053 1.46      
11 B1u 1991 1808 690.63      
12 B1u 1482 1346 5.37      
13 B1u 1018 924 14.92      
14 B1u 806 732 0.83      
15 B2g 1127 1023 0.00      
16 B2g 887 806 0.00      
17 B2g 260 236 0.00      
18 B2u 3382 3071 3.50      
19 B2u 1831 1662 11.74      
20 B2u 1425 1294 105.40      
21 B2u 1162 1056 43.96      
22 B2u 450 409 35.47      
23 B3g 3362 3053 0.00      
24 B3g 1521 1381 0.00      
25 B3g 1323 1201 0.00      
26 B3g 647 588 0.00      
27 B3g 486 441 0.00      
28 B3u 1004 911 108.36      
29 B3u 565 513 1.68      
30 B3u 100 90 16.44      

Unscaled Zero Point Vibrational Energy (zpe) 20160.0 cm-1
Scaled (by 0.908) Zero Point Vibrational Energy (zpe) 18305.3 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/cc-pVDZ
ABC
0.17425 0.05643 0.04263

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

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 1.271 0.663
C4 0.000 -1.271 0.663
C5 0.000 -1.271 -0.663
C6 0.000 1.271 -0.663
O7 0.000 0.000 2.632
O8 0.000 0.000 -2.632
H9 0.000 2.181 1.248
H10 0.000 -2.181 1.248
H11 0.000 -2.181 -1.248
H12 0.000 2.181 -1.248

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.87981.48981.48982.45732.45731.19204.07182.18932.18933.46133.4613
C22.87982.45732.45731.48981.48984.07181.19203.46133.46132.18932.1893
C31.48982.45732.54252.86761.32612.34363.53171.08143.50133.94582.1165
C41.48982.45732.54251.32612.86762.34363.53173.50131.08142.11653.9458
C52.45731.48982.86761.32612.54253.53172.34363.94582.11651.08143.5013
C62.45731.48981.32612.86762.54253.53172.34362.11653.94583.50131.0814
O71.19204.07182.34362.34363.53173.53175.26382.58292.58294.45084.4508
O84.07181.19203.53173.53172.34362.34365.26384.45084.45082.58292.5829
H92.18933.46131.08143.50133.94582.11652.58294.45084.36175.02542.4959
H102.18933.46133.50131.08142.11653.94582.58294.45084.36172.49595.0254
H113.46132.18933.94582.11651.08143.50134.45082.58295.02542.49594.3617
H123.46132.18932.11653.94583.50131.08144.45082.58292.49595.02544.3617

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.428 C1 C3 H9 115.830
C1 C4 C5 121.428 C1 C4 H10 115.830
C2 C5 C4 121.428 C2 C5 H11 115.830
C2 C6 C3 121.428 C2 C6 H12 115.830
C3 C1 C4 117.143 C3 C1 O7 121.428
C3 C6 H12 122.742 C4 C1 O7 121.428
C4 C5 H11 122.742 C5 C2 C6 117.143
C5 C2 O8 121.428 C5 C4 H10 122.742
C6 C2 O8 121.428 C6 C3 H9 122.742
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.223      
2 C 0.223      
3 C -0.023      
4 C -0.023      
5 C -0.023      
6 C -0.023      
7 O -0.294      
8 O -0.294      
9 H 0.058      
10 H 0.058      
11 H 0.058      
12 H 0.058      


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 -45.784 0.000 0.000
y 0.000 -37.669 0.000
z 0.000 0.000 -62.417
Traceless
 xyz
x 4.259 0.000 0.000
y 0.000 16.431 0.000
z 0.000 0.000 -20.690
Polar
3z2-r2-41.380
x2-y2-8.115
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.924 0.000 0.000
y 0.000 8.205 0.000
z 0.000 0.000 15.067


<r2> (average value of r2) Å2
<r2> 240.670
(<r2>)1/2 15.514