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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: HF/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-379.373445
Energy at 298.15K-379.378347
Nuclear repulsion energy325.873064
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/aug-cc-pVTZ
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 3360 3059 0.00      
2 Ag 1980 1802 0.00      
3 Ag 1833 1668 0.00      
4 Ag 1258 1145 0.00      
5 Ag 814 741 0.00      
6 Ag 482 439 0.00      
7 Au 1135 1033 0.00      
8 Au 380 346 0.00      
9 B1g 840 765 0.00      
10 B1u 3340 3040 1.27      
11 B1u 1960 1784 770.66      
12 B1u 1501 1366 3.76      
13 B1u 1027 935 14.47      
14 B1u 803 731 0.12      
15 B2g 1144 1041 0.00      
16 B2g 899 818 0.00      
17 B2g 257 234 0.00      
18 B2u 3359 3058 3.52      
19 B2u 1809 1647 11.17      
20 B2u 1424 1297 101.17      
21 B2u 1169 1064 40.38      
22 B2u 451 410 34.19      
23 B3g 3339 3040 0.00      
24 B3g 1522 1385 0.00      
25 B3g 1336 1217 0.00      
26 B3g 646 588 0.00      
27 B3g 489 446 0.00      
28 B3u 1011 920 103.07      
29 B3u 567 516 2.78      
30 B3u 96 87 17.99      

Unscaled Zero Point Vibrational Energy (zpe) 20113.6 cm-1
Scaled (by 0.9104) Zero Point Vibrational Energy (zpe) 18311.4 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/aug-cc-pVTZ
ABC
0.17471 0.05694 0.04295

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.432
C2 0.000 0.000 -1.432
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 2.621
O8 0.000 0.000 -2.621
H9 0.000 2.172 1.240
H10 0.000 -2.172 1.240
H11 0.000 -2.172 -1.240
H12 0.000 2.172 -1.240

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.86491.48711.48712.44732.44731.18844.05332.18082.18083.44393.4439
C22.86492.44732.44731.48711.48714.05331.18843.44393.44392.18082.1808
C31.48712.44732.54072.86261.31872.33693.51761.07263.49133.93182.1025
C41.48712.44732.54071.31872.86262.33693.51763.49131.07262.10253.9318
C52.44731.48712.86261.31872.54073.51762.33693.93182.10251.07263.4913
C62.44731.48711.31872.86262.54073.51762.33692.10253.93183.49131.0726
O71.18844.05332.33692.33693.51763.51765.24172.57412.57414.42994.4299
O84.05331.18843.51763.51762.33692.33695.24174.42994.42992.57412.5741
H92.18083.44391.07263.49133.93182.10252.57414.42994.34465.00252.4798
H102.18083.44393.49131.07262.10253.93182.57414.42994.34462.47985.0025
H113.44392.18083.93182.10251.07263.49134.42992.57415.00252.47984.3446
H123.44392.18082.10253.93183.49131.07264.42992.57412.47985.00254.3446

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.323 C1 C3 H9 115.908
C1 C4 C5 121.323 C1 C4 H10 115.908
C2 C5 C4 121.323 C2 C5 H11 115.908
C2 C6 C3 121.323 C2 C6 H12 115.908
C3 C1 C4 117.354 C3 C1 O7 121.323
C3 C6 H12 122.769 C4 C1 O7 121.323
C4 C5 H11 122.769 C5 C2 C6 117.354
C5 C2 O8 121.323 C5 C4 H10 122.769
C6 C2 O8 121.323 C6 C3 H9 122.769
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 1.079      
2 C 1.079      
3 C -0.606      
4 C -0.606      
5 C -0.606      
6 C -0.606      
7 O -1.018      
8 O -1.018      
9 H 0.575      
10 H 0.575      
11 H 0.575      
12 H 0.575      


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 -46.008 0.000 0.000
y 0.000 -37.381 0.000
z 0.000 0.000 -63.830
Traceless
 xyz
x 4.598 0.000 0.000
y 0.000 17.538 0.000
z 0.000 0.000 -22.135
Polar
3z2-r2-44.271
x2-y2-8.627
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.347 0.000 0.000
y 0.000 9.457 0.000
z 0.000 0.000 16.240


<r2> (average value of r2) Å2
<r2> 239.362
(<r2>)1/2 15.471