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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: B3LYP/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at B3LYP/6-31+G**
 hartrees
Energy at 0K-381.476503
Energy at 298.15K-381.480930
Nuclear repulsion energy321.790360
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 B3LYP/6-31+G**
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 3216 3101 0.00      
2 Ag 1738 1675 0.00      
3 Ag 1680 1620 0.00      
4 Ag 1169 1127 0.00      
5 Ag 775 747 0.00      
6 Ag 454 438 0.00      
7 Au 1017 980 0.00      
8 Au 339 327 0.00      
9 B1g 757 730 0.00      
10 B1u 3198 3083 1.60      
11 B1u 1736 1673 447.84      
12 B1u 1386 1336 4.78      
13 B1u 948 914 19.35      
14 B1u 756 729 0.49      
15 B2g 1017 980 0.00      
16 B2g 784 756 0.00      
17 B2g 231 223 0.00      
18 B2u 3214 3099 4.44      
19 B2u 1648 1589 16.87      
20 B2u 1321 1274 79.18      
21 B2u 1086 1047 44.59      
22 B2u 412 397 25.20      
23 B3g 3198 3083 0.00      
24 B3g 1399 1349 0.00      
25 B3g 1238 1193 0.00      
26 B3g 602 580 0.00      
27 B3g 456 440 0.00      
28 B3u 902 869 82.91      
29 B3u 514 495 4.29      
30 B3u 94 91 15.37      

Unscaled Zero Point Vibrational Energy (zpe) 18640.1 cm-1
Scaled (by 0.9642) Zero Point Vibrational Energy (zpe) 17972.8 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 B3LYP/6-31+G**
ABC
0.17420 0.05506 0.04183

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31+G**

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.443
C2 0.000 0.000 -1.443
C3 0.000 1.271 0.672
C4 0.000 -1.271 0.672
C5 0.000 -1.271 -0.672
C6 0.000 1.271 -0.672
O7 0.000 0.000 2.670
O8 0.000 0.000 -2.670
H9 0.000 2.185 1.259
H10 0.000 -2.185 1.259
H11 0.000 -2.185 -1.259
H12 0.000 2.185 -1.259

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.88641.48641.48642.46792.46791.22714.11352.19242.19243.47523.4752
C22.88642.46792.46791.48641.48644.11351.22713.47523.47522.19242.1924
C31.48642.46792.54182.87551.34462.36793.57611.08623.50513.95892.1370
C41.48642.46792.54181.34462.87552.36793.57613.50511.08622.13703.9589
C52.46791.48642.87551.34462.54183.57612.36793.95892.13701.08623.5051
C62.46791.48641.34462.87552.54183.57612.36792.13703.95893.50511.0862
O71.22714.11352.36792.36793.57613.57615.34062.60072.60074.49624.4962
O84.11351.22713.57613.57612.36792.36795.34064.49624.49622.60072.6007
H92.19243.47521.08623.50513.95892.13702.60074.49624.36945.04342.5188
H102.19243.47523.50511.08622.13703.95892.60074.49624.36942.51885.0434
H113.47522.19243.95892.13701.08623.50514.49622.60075.04342.51884.3694
H123.47522.19242.13703.95893.50511.08624.49622.60072.51885.04344.3694

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.240 C1 C3 H9 116.041
C1 C4 C5 121.240 C1 C4 H10 116.041
C2 C5 C4 121.240 C2 C5 H11 116.041
C2 C6 C3 121.240 C2 C6 H12 116.041
C3 C1 C4 117.520 C3 C1 O7 121.240
C3 C6 H12 122.719 C4 C1 O7 121.240
C4 C5 H11 122.719 C5 C2 C6 117.520
C5 C2 O8 121.240 C5 C4 H10 122.719
C6 C2 O8 121.240 C6 C3 H9 122.719
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.087      
2 C -0.087      
3 C 0.106      
4 C 0.106      
5 C 0.106      
6 C 0.106      
7 O -0.446      
8 O -0.446      
9 H 0.160      
10 H 0.160      
11 H 0.160      
12 H 0.160      


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 -45.945 0.000 0.000
y 0.000 -37.692 0.000
z 0.000 0.000 -64.102
Traceless
 xyz
x 4.952 0.000 0.000
y 0.000 17.332 0.000
z 0.000 0.000 -22.284
Polar
3z2-r2-44.567
x2-y2-8.253
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.885 0.000 0.000
y 0.000 10.030 0.000
z 0.000 0.000 17.651


<r2> (average value of r2) Å2
<r2> 244.891
(<r2>)1/2 15.649