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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: B3PW91/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 B3PW91/cc-pVDZ
 hartrees
Energy at 0K-381.330171
Energy at 298.15K-381.334648
Nuclear repulsion energy322.253478
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 B3PW91/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 3219 3106 0.00      
2 Ag 1768 1706 0.00      
3 Ag 1700 1641 0.00      
4 Ag 1143 1103 0.00      
5 Ag 785 758 0.00      
6 Ag 452 436 0.00      
7 Au 1025 989 0.00      
8 Au 337 325 0.00      
9 B1g 763 737 0.00      
10 B1u 3198 3086 2.33      
11 B1u 1769 1707 356.54      
12 B1u 1363 1315 7.31      
13 B1u 941 908 16.12      
14 B1u 759 733 1.29      
15 B2g 1032 996 0.00      
16 B2g 821 792 0.00      
17 B2g 240 232 0.00      
18 B2u 3216 3104 3.83      
19 B2u 1669 1611 19.44      
20 B2u 1323 1277 81.02      
21 B2u 1072 1034 44.30      
22 B2u 412 398 23.73      
23 B3g 3199 3087 0.00      
24 B3g 1398 1349 0.00      
25 B3g 1224 1181 0.00      
26 B3g 602 581 0.00      
27 B3g 446 431 0.00      
28 B3u 919 887 70.86      
29 B3u 518 500 3.95      
30 B3u 96 92 11.72      

Unscaled Zero Point Vibrational Energy (zpe) 18704.5 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 18049.9 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 B3PW91/cc-pVDZ
ABC
0.17520 0.05514 0.04194

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVDZ

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 1.266 0.672
C4 0.000 -1.266 0.672
C5 0.000 -1.266 -0.672
C6 0.000 1.266 -0.672
O7 0.000 0.000 2.667
O8 0.000 0.000 -2.667
H9 0.000 2.185 1.263
H10 0.000 -2.185 1.263
H11 0.000 -2.185 -1.263
H12 0.000 2.185 -1.263

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.89081.48381.48382.46702.46701.22144.11222.19302.19303.48023.4802
C22.89082.46702.46701.48381.48384.11221.22143.48023.48022.19302.1930
C31.48382.46702.53252.86701.34382.36283.57071.09293.50193.95702.1422
C41.48382.46702.53251.34382.86702.36283.57073.50191.09292.14223.9570
C52.46701.48382.86701.34382.53253.57072.36283.95702.14221.09293.5019
C62.46701.48381.34382.86702.53253.57072.36282.14223.95703.50191.0929
O71.22144.11222.36282.36283.57073.57075.33362.59732.59734.49674.4967
O84.11221.22143.57073.57072.36282.36285.33364.49674.49672.59732.5973
H92.19303.48021.09293.50193.95702.14222.59734.49674.37085.04832.5262
H102.19303.48023.50191.09292.14223.95702.59734.49674.37082.52625.0483
H113.48022.19303.95702.14221.09293.50194.49672.59735.04832.52624.3708
H123.48022.19302.14223.95703.50191.09294.49672.59732.52625.04834.3708

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.418 C1 C3 H9 115.832
C1 C4 C5 121.418 C1 C4 H10 115.832
C2 C5 C4 121.418 C2 C5 H11 115.832
C2 C6 C3 121.418 C2 C6 H12 115.832
C3 C1 C4 117.164 C3 C1 O7 121.418
C3 C6 H12 122.751 C4 C1 O7 121.418
C4 C5 H11 122.751 C5 C2 C6 117.164
C5 C2 O8 121.418 C5 C4 H10 122.751
C6 C2 O8 121.418 C6 C3 H9 122.751
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.106      
2 C 0.106      
3 C 0.010      
4 C 0.010      
5 C 0.010      
6 C 0.010      
7 O -0.200      
8 O -0.200      
9 H 0.037      
10 H 0.037      
11 H 0.037      
12 H 0.037      


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 -44.917 0.000 0.000
y 0.000 -37.274 0.000
z 0.000 0.000 -59.543
Traceless
 xyz
x 3.491 0.000 0.000
y 0.000 14.957 0.000
z 0.000 0.000 -18.448
Polar
3z2-r2-36.895
x2-y2-7.644
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.979 0.000 0.000
y 0.000 9.333 0.000
z 0.000 0.000 15.435


<r2> (average value of r2) Å2
<r2> 243.168
(<r2>)1/2 15.594