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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: BLYP/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 BLYP/6-31G*
 hartrees
Energy at 0K-381.343741
Energy at 298.15K-381.347997
HF Energy-381.343741
Nuclear repulsion energy319.327774
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 BLYP/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 3130 3105 0.00      
2 Ag 1649 1635 0.00      
3 Ag 1616 1603 0.00      
4 Ag 1145 1136 0.00      
5 Ag 750 743 0.00      
6 Ag 443 440 0.00      
7 Au 978 970 0.00      
8 Au 323 320 0.00      
9 B1g 743 737 0.00      
10 B1u 3111 3086 7.03      
11 B1u 1653 1640 260.46      
12 B1u 1358 1347 3.18      
13 B1u 921 914 19.85      
14 B1u 730 724 0.53      
15 B2g 994 986 0.00      
16 B2g 773 767 0.00      
17 B2g 235 233 0.00      
18 B2u 3127 3102 16.70      
19 B2u 1581 1568 14.66      
20 B2u 1279 1268 69.33      
21 B2u 1055 1046 52.38      
22 B2u 396 393 21.46      
23 B3g 3111 3086 0.00      
24 B3g 1357 1346 0.00      
25 B3g 1197 1188 0.00      
26 B3g 581 576 0.00      
27 B3g 443 440 0.00      
28 B3u 880 873 61.47      
29 B3u 502 498 1.80      
30 B3u 99 98 11.42      

Unscaled Zero Point Vibrational Energy (zpe) 18078.9 cm-1
Scaled (by 0.9919) Zero Point Vibrational Energy (zpe) 17932.5 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 BLYP/6-31G*
ABC
0.17294 0.05399 0.04115

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.470
C2 0.000 0.000 -1.470
C3 0.000 1.278 0.677
C4 0.000 -1.278 0.677
C5 0.000 -1.278 -0.677
C6 0.000 1.278 -0.677
O7 0.000 0.000 2.700
O8 0.000 0.000 -2.700
H9 0.000 2.196 1.271
H10 0.000 -2.196 1.271
H11 0.000 -2.196 -1.271
H12 0.000 2.196 -1.271

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.93961.50341.50342.49842.49841.23034.16992.20522.20523.51223.5122
C22.93962.49842.49841.50341.50344.16991.23033.51223.51222.20522.2052
C31.50342.49842.55512.89191.35452.39253.61091.09393.52423.98282.1539
C41.50342.49842.55511.35452.89192.39253.61093.52421.09392.15393.9828
C52.49841.50342.89191.35452.55513.61092.39253.98282.15391.09393.5242
C62.49841.50341.35452.89192.55513.61092.39252.15393.98283.52421.0939
O71.23034.16992.39252.39253.61093.61095.40022.62032.62034.53794.5379
O84.16991.23033.61093.61092.39252.39255.40024.53794.53792.62032.6203
H92.20523.51221.09393.52423.98282.15392.62034.53794.39255.07502.5419
H102.20523.51223.52421.09392.15393.98282.62034.53794.39252.54195.0750
H113.51222.20523.98282.15391.09393.52424.53792.62035.07502.54194.3925
H123.51222.20522.15393.98283.52421.09394.53792.62032.54195.07504.3925

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.815 C1 C3 H9 115.312
C1 C4 C5 121.815 C1 C4 H10 115.312
C2 C5 C4 121.815 C2 C5 H11 115.312
C2 C6 C3 121.815 C2 C6 H12 115.312
C3 C1 C4 116.370 C3 C1 O7 121.815
C3 C6 H12 122.873 C4 C1 O7 121.815
C4 C5 H11 122.873 C5 C2 C6 116.370
C5 C2 O8 121.815 C5 C4 H10 122.873
C6 C2 O8 121.815 C6 C3 H9 122.873
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.418      
2 C 0.418      
3 C -0.131      
4 C -0.131      
5 C -0.131      
6 C -0.131      
7 O -0.436      
8 O -0.436      
9 H 0.140      
10 H 0.140      
11 H 0.140      
12 H 0.140      


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 -44.428 0.000 0.000
y 0.000 -37.437 0.000
z 0.000 0.000 -60.123
Traceless
 xyz
x 4.353 0.000 0.000
y 0.000 14.838 0.000
z 0.000 0.000 -19.191
Polar
3z2-r2-38.382
x2-y2-6.991
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.691 0.000 0.000
y 0.000 9.494 0.000
z 0.000 0.000 15.811


<r2> (average value of r2) Å2
<r2> 247.215
(<r2>)1/2 15.723