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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: B3LYP/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 B3LYP/6-31G
 hartrees
Energy at 0K-381.341554
Energy at 298.15K-381.346146
Nuclear repulsion energy320.711789
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/6-31G
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 3240 3117 0.00      
2 Ag 1718 1653 0.00      
3 Ag 1634 1572 0.00      
4 Ag 1199 1154 0.00      
5 Ag 789 759 0.00      
6 Ag 465 448 0.00      
7 Au 1047 1008 0.00      
8 Au 363 349 0.00      
9 B1g 788 758 0.00      
10 B1u 3219 3096 0.96      
11 B1u 1674 1610 253.02      
12 B1u 1411 1357 1.65      
13 B1u 965 928 18.27      
14 B1u 769 740 2.73      
15 B2g 1051 1011 0.00      
16 B2g 798 767 0.00      
17 B2g 262 252 0.00      
18 B2u 3237 3114 8.63      
19 B2u 1659 1595 20.90      
20 B2u 1349 1298 63.58      
21 B2u 1103 1061 55.58      
22 B2u 408 392 27.86      
23 B3g 3219 3096 0.00      
24 B3g 1417 1363 0.00      
25 B3g 1268 1220 0.00      
26 B3g 618 595 0.00      
27 B3g 468 450 0.00      
28 B3u 914 879 89.72      
29 B3u 524 504 4.12      
30 B3u 106 102 15.53      

Unscaled Zero Point Vibrational Energy (zpe) 18839.4 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 18123.5 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 B3LYP/6-31G
ABC
0.17545 0.05438 0.04151

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.441
C2 0.000 0.000 -1.441
C3 0.000 1.266 0.674
C4 0.000 -1.266 0.674
C5 0.000 -1.266 -0.674
C6 0.000 1.266 -0.674
O7 0.000 0.000 2.693
O8 0.000 0.000 -2.693
H9 0.000 2.179 1.259
H10 0.000 -2.179 1.259
H11 0.000 -2.179 -1.259
H12 0.000 2.179 -1.259

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.88201.48021.48022.46512.46511.25194.13392.18702.18703.47003.4700
C22.88202.46512.46511.48021.48024.13391.25193.47003.47002.18702.1870
C31.48022.46512.53212.86871.34832.38293.59721.08473.49483.95082.1383
C41.48022.46512.53211.34832.86872.38293.59723.49481.08472.13833.9508
C52.46511.48022.86871.34832.53213.59722.38293.95082.13831.08473.4948
C62.46511.48021.34832.86872.53213.59722.38292.13833.95083.49481.0847
O71.25194.13392.38292.38293.59723.59725.38582.60872.60874.51324.5132
O84.13391.25193.59723.59722.38292.38295.38584.51324.51322.60872.6087
H92.18703.47001.08473.49483.95082.13832.60874.51324.35885.03412.5184
H102.18703.47003.49481.08472.13833.95082.60874.51324.35882.51845.0341
H113.47002.18703.95082.13831.08473.49484.51322.60875.03412.51844.3588
H123.47002.18702.13833.95083.49481.08474.51322.60872.51845.03414.3588

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.203 C1 C3 H9 116.157
C1 C4 C5 121.203 C1 C4 H10 116.157
C2 C5 C4 121.203 C2 C5 H11 116.157
C2 C6 C3 121.203 C2 C6 H12 116.157
C3 C1 C4 117.594 C3 C1 O7 121.203
C3 C6 H12 122.640 C4 C1 O7 121.203
C4 C5 H11 122.640 C5 C2 C6 117.594
C5 C2 O8 121.203 C5 C4 H10 122.640
C6 C2 O8 121.203 C6 C3 H9 122.640
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.276      
2 C 0.276      
3 C -0.109      
4 C -0.109      
5 C -0.109      
6 C -0.109      
7 O -0.405      
8 O -0.405      
9 H 0.174      
10 H 0.174      
11 H 0.174      
12 H 0.174      


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 -44.954 0.000 0.000
y 0.000 -37.044 0.000
z 0.000 0.000 -63.624
Traceless
 xyz
x 5.380 0.000 0.000
y 0.000 17.245 0.000
z 0.000 0.000 -22.625
Polar
3z2-r2-45.250
x2-y2-7.910
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.268 0.000 0.000
y 0.000 8.519 0.000
z 0.000 0.000 16.028


<r2> (average value of r2) Å2
<r2> 245.979
(<r2>)1/2 15.684