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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: mPW1PW91/6-31+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 mPW1PW91/6-31+G**
 hartrees
Energy at 0K-381.375437
Energy at 298.15K-381.379877
Nuclear repulsion energy322.905356
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 mPW1PW91/6-31+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 3247 3091 0.00      
2 Ag 1781 1695 0.00      
3 Ag 1710 1627 0.00      
4 Ag 1171 1114 0.00      
5 Ag 789 751 0.00      
6 Ag 455 433 0.00      
7 Au 1025 976 0.00      
8 Au 337 321 0.00      
9 B1g 759 722 0.00      
10 B1u 3228 3073 0.95      
11 B1u 1779 1693 460.31      
12 B1u 1390 1323 6.65      
13 B1u 955 909 17.06      
14 B1u 765 728 0.69      
15 B2g 1021 972 0.00      
16 B2g 789 751 0.00      
17 B2g 227 216 0.00      
18 B2u 3245 3089 2.49      
19 B2u 1679 1598 18.96      
20 B2u 1341 1276 83.08      
21 B2u 1093 1040 40.92      
22 B2u 415 395 25.93      
23 B3g 3229 3073 0.00      
24 B3g 1415 1346 0.00      
25 B3g 1249 1188 0.00      
26 B3g 607 577 0.00      
27 B3g 451 430 0.00      
28 B3u 907 863 89.26      
29 B3u 515 490 5.44      
30 B3u 92 87 15.09      

Unscaled Zero Point Vibrational Energy (zpe) 18830.7 cm-1
Scaled (by 0.9518) Zero Point Vibrational Energy (zpe) 17923.1 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 mPW1PW91/6-31+G**
ABC
0.17525 0.05547 0.04214

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31+G**

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.438
C2 0.000 0.000 -1.438
C3 0.000 1.267 0.670
C4 0.000 -1.267 0.670
C5 0.000 -1.267 -0.670
C6 0.000 1.267 -0.670
O7 0.000 0.000 2.660
O8 0.000 0.000 -2.660
H9 0.000 2.180 1.257
H10 0.000 -2.180 1.257
H11 0.000 -2.180 -1.257
H12 0.000 2.180 -1.257

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.87691.48151.48152.46002.46001.22124.09812.18722.18723.46633.4663
C22.87692.46002.46001.48151.48154.09811.22123.46633.46632.18722.1872
C31.48152.46002.53372.86651.34062.35853.56281.08503.49613.94882.1324
C41.48152.46002.53371.34062.86652.35853.56283.49611.08502.13243.9488
C52.46001.48152.86651.34062.53373.56282.35853.94882.13241.08503.4961
C62.46001.48151.34062.86652.53373.56282.35852.13243.94883.49611.0850
O71.22124.09812.35852.35853.56283.56285.31932.59212.59214.48224.4822
O84.09811.22123.56283.56282.35852.35855.31934.48224.48222.59212.5921
H92.18723.46631.08503.49613.94882.13242.59214.48224.35945.03222.5137
H102.18723.46633.49611.08502.13243.94882.59214.48224.35942.51375.0322
H113.46632.18723.94882.13241.08503.49614.48222.59215.03222.51374.3594
H123.46632.18722.13243.94883.49611.08504.48222.59212.51375.03224.3594

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.229 C1 C3 H9 116.050
C1 C4 C5 121.229 C1 C4 H10 116.050
C2 C5 C4 121.229 C2 C5 H11 116.050
C2 C6 C3 121.229 C2 C6 H12 116.050
C3 C1 C4 117.543 C3 C1 O7 121.229
C3 C6 H12 122.722 C4 C1 O7 121.229
C4 C5 H11 122.722 C5 C2 C6 117.543
C5 C2 O8 121.229 C5 C4 H10 122.722
C6 C2 O8 121.229 C6 C3 H9 122.722
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.263      
2 C -0.263      
3 C 0.146      
4 C 0.146      
5 C 0.146      
6 C 0.146      
7 O -0.418      
8 O -0.418      
9 H 0.194      
10 H 0.194      
11 H 0.194      
12 H 0.194      


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 -45.751 0.000 0.000
y 0.000 -37.049 0.000
z 0.000 0.000 -63.108
Traceless
 xyz
x 4.328 0.000 0.000
y 0.000 17.380 0.000
z 0.000 0.000 -21.708
Polar
3z2-r2-43.416
x2-y2-8.701
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.732 0.000 0.000
y 0.000 9.749 0.000
z 0.000 0.000 17.321


<r2> (average value of r2) Å2
<r2> 243.011
(<r2>)1/2 15.589