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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: BLYP/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-381.369547
Energy at 298.15K-381.373867
Nuclear repulsion energy319.066021
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/cc-pVDZ
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 3117 3122 0.00      
2 Ag 1643 1646 0.00      
3 Ag 1610 1613 0.00      
4 Ag 1114 1116 0.00      
5 Ag 749 751 0.00      
6 Ag 442 442 0.00      
7 Au 994 996 0.00      
8 Au 326 326 0.00      
9 B1g 749 750 0.00      
10 B1u 3097 3102 6.81      
11 B1u 1647 1650 267.82      
12 B1u 1326 1328 3.67      
13 B1u 912 913 19.61      
14 B1u 729 730 0.64      
15 B2g 1006 1007 0.00      
16 B2g 794 795 0.00      
17 B2g 238 238 0.00      
18 B2u 3114 3119 13.21      
19 B2u 1578 1580 17.03      
20 B2u 1262 1264 65.41      
21 B2u 1036 1037 51.93      
22 B2u 396 397 19.41      
23 B3g 3097 3102 0.00      
24 B3g 1339 1341 0.00      
25 B3g 1180 1182 0.00      
26 B3g 581 582 0.00      
27 B3g 441 442 0.00      
28 B3u 892 893 50.91      
29 B3u 506 507 2.70      
30 B3u 98 98 10.15      

Unscaled Zero Point Vibrational Energy (zpe) 18005.0 cm-1
Scaled (by 1.0016) Zero Point Vibrational Energy (zpe) 18033.8 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 BLYP/cc-pVDZ
ABC
0.17277 0.05389 0.04108

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/cc-pVDZ

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.460
C2 0.000 0.000 -1.460
C3 0.000 1.275 0.679
C4 0.000 -1.275 0.679
C5 0.000 -1.275 -0.679
C6 0.000 1.275 -0.679
O7 0.000 0.000 2.699
O8 0.000 0.000 -2.699
H9 0.000 2.200 1.275
H10 0.000 -2.200 1.275
H11 0.000 -2.200 -1.275
H12 0.000 2.200 -1.275

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.91921.49531.49532.48992.48991.23934.15852.20762.20763.50963.5096
C22.91922.48992.48991.49531.49534.15851.23933.50963.50962.20762.2076
C31.49532.48992.55052.88941.35782.38893.61051.10013.52593.98672.1615
C41.49532.48992.55051.35782.88942.38893.61053.52591.10012.16153.9867
C52.48991.49532.88941.35782.55053.61052.38893.98672.16151.10013.5259
C62.48991.49531.35782.88942.55053.61052.38892.16153.98673.52591.1001
O71.23934.15852.38892.38893.61053.61055.39782.62062.62064.54214.5421
O84.15851.23933.61053.61052.38892.38895.39784.54214.54212.62062.6206
H92.20763.50961.10013.52593.98672.16152.62064.54214.39985.08532.5498
H102.20763.50963.52591.10012.16153.98672.62064.54214.39982.54985.0853
H113.50962.20763.98672.16151.10013.52594.54212.62065.08532.54984.3998
H123.50962.20762.16153.98673.52591.10014.54212.62062.54985.08534.3998

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.474 C1 C3 H9 115.720
C1 C4 C5 121.474 C1 C4 H10 115.720
C2 C5 C4 121.474 C2 C5 H11 115.720
C2 C6 C3 121.474 C2 C6 H12 115.720
C3 C1 C4 117.051 C3 C1 O7 121.474
C3 C6 H12 122.806 C4 C1 O7 121.474
C4 C5 H11 122.806 C5 C2 C6 117.051
C5 C2 O8 121.474 C5 C4 H10 122.806
C6 C2 O8 121.474 C6 C3 H9 122.806
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.061      
2 C 0.061      
3 C 0.070      
4 C 0.070      
5 C 0.070      
6 C 0.070      
7 O -0.161      
8 O -0.161      
9 H -0.020      
10 H -0.020      
11 H -0.020      
12 H -0.020      


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 -44.892 0.000 0.000
y 0.000 -38.328 0.000
z 0.000 0.000 -59.561
Traceless
 xyz
x 4.053 0.000 0.000
y 0.000 13.898 0.000
z 0.000 0.000 -17.951
Polar
3z2-r2-35.901
x2-y2-6.563
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.991 0.000 0.000
y 0.000 10.090 0.000
z 0.000 0.000 15.912


<r2> (average value of r2) Å2
<r2> 247.788
(<r2>)1/2 15.741