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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: B3LYP/6-311G**

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/6-311G**
 hartrees
Energy at 0K-381.552209
Energy at 298.15K-381.556676
Nuclear repulsion energy322.635889
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/6-311G**
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 3195 3089 0.00      
2 Ag 1740 1682 0.00      
3 Ag 1680 1625 0.00      
4 Ag 1163 1124 0.00      
5 Ag 768 742 0.00      
6 Ag 455 440 0.00      
7 Au 1026 992 0.00      
8 Au 338 327 0.00      
9 B1g 761 736 0.00      
10 B1u 3176 3070 3.20      
11 B1u 1742 1684 378.37      
12 B1u 1379 1333 5.88      
13 B1u 945 914 19.43      
14 B1u 753 728 0.36      
15 B2g 1027 993 0.00      
16 B2g 808 781 0.00      
17 B2g 234 226 0.00      
18 B2u 3192 3086 6.71      
19 B2u 1645 1590 16.88      
20 B2u 1309 1266 76.13      
21 B2u 1080 1044 56.64      
22 B2u 413 399 24.98      
23 B3g 3176 3071 0.00      
24 B3g 1390 1344 0.00      
25 B3g 1227 1186 0.00      
26 B3g 601 581 0.00      
27 B3g 455 440 0.00      
28 B3u 913 883 82.39      
29 B3u 516 499 4.36      
30 B3u 95 92 12.89      

Unscaled Zero Point Vibrational Energy (zpe) 18600.5 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 17982.9 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/6-311G**
ABC
0.17504 0.05530 0.04202

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G**

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.445
C2 0.000 0.000 -1.445
C3 0.000 1.268 0.669
C4 0.000 -1.268 0.669
C5 0.000 -1.268 -0.669
C6 0.000 1.268 -0.669
O7 0.000 0.000 2.663
O8 0.000 0.000 -2.663
H9 0.000 2.179 1.257
H10 0.000 -2.179 1.257
H11 0.000 -2.179 -1.257
H12 0.000 2.179 -1.257

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.88981.48621.48622.46532.46531.21814.10792.18742.18743.47123.4712
C22.88982.46532.46531.48621.48624.10791.21813.47123.47122.18742.1874
C31.48622.46532.53572.86751.33892.36263.56551.08443.49693.94902.1311
C41.48622.46532.53571.33892.86752.36263.56553.49691.08442.13113.9490
C52.46531.48622.86751.33892.53573.56552.36263.94902.13111.08443.4969
C62.46531.48621.33892.86752.53573.56552.36262.13113.94903.49691.0844
O71.21814.10792.36262.36263.56553.56555.32602.59352.59354.48514.4851
O84.10791.21813.56553.56552.36262.36265.32604.48514.48512.59352.5935
H92.18743.47121.08443.49693.94902.13112.59354.48514.35875.03172.5139
H102.18743.47123.49691.08442.13113.94902.59354.48514.35872.51395.0317
H113.47122.18743.94902.13111.08443.49694.48512.59355.03172.51394.3587
H123.47122.18742.13113.94903.49691.08444.48512.59352.51395.03174.3587

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.450 C1 C3 H9 115.745
C1 C4 C5 121.450 C1 C4 H10 115.745
C2 C5 C4 121.450 C2 C5 H11 115.745
C2 C6 C3 121.450 C2 C6 H12 115.745
C3 C1 C4 117.100 C3 C1 O7 121.450
C3 C6 H12 122.805 C4 C1 O7 121.450
C4 C5 H11 122.805 C5 C2 C6 117.100
C5 C2 O8 121.450 C5 C4 H10 122.805
C6 C2 O8 121.450 C6 C3 H9 122.805
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.211      
2 C 0.211      
3 C -0.096      
4 C -0.096      
5 C -0.096      
6 C -0.096      
7 O -0.278      
8 O -0.278      
9 H 0.130      
10 H 0.130      
11 H 0.130      
12 H 0.130      


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 -45.390 0.000 0.000
y 0.000 -37.711 0.000
z 0.000 0.000 -61.293
Traceless
 xyz
x 4.112 0.000 0.000
y 0.000 15.631 0.000
z 0.000 0.000 -19.743
Polar
3z2-r2-39.486
x2-y2-7.679
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.405 0.000 0.000
y 0.000 9.367 0.000
z 0.000 0.000 15.731


<r2> (average value of r2) Å2
<r2> 243.235
(<r2>)1/2 15.596