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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: PBEPBE/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 PBEPBE/cc-pVDZ
 hartrees
Energy at 0K-381.039642
Energy at 298.15K-381.043940
Nuclear repulsion energy320.124971
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 PBEPBE/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Ag 3137 3119 0.00      
2 Ag 1672 1662 0.00      
3 Ag 1634 1625 0.00      
4 Ag 1105 1098 0.00      
5 Ag 766 762 0.00      
6 Ag 440 438 0.00      
7 Au 989 983 0.00      
8 Au 319 317 0.00      
9 B1g 741 737 0.00      
10 B1u 3116 3098 4.25      
11 B1u 1679 1669 274.39      
12 B1u 1318 1310 5.65      
13 B1u 914 908 16.94      
14 B1u 738 734 1.30      
15 B2g 999 993 0.00      
16 B2g 796 792 0.00      
17 B2g 230 229 0.00      
18 B2u 3134 3116 7.10      
19 B2u 1600 1591 20.26      
20 B2u 1279 1272 68.86      
21 B2u 1034 1028 45.96      
22 B2u 398 396 19.92      
23 B3g 3116 3098 0.00      
24 B3g 1349 1342 0.00      
25 B3g 1183 1176 0.00      
26 B3g 584 581 0.00      
27 B3g 433 431 0.00      
28 B3u 891 886 57.22      
29 B3u 501 498 4.16      
30 B3u 95 94 9.92      

Unscaled Zero Point Vibrational Energy (zpe) 18095.1 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 17990.1 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 PBEPBE/cc-pVDZ
ABC
0.17416 0.05425 0.04136

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.454
C2 0.000 0.000 -1.454
C3 0.000 1.270 0.678
C4 0.000 -1.270 0.678
C5 0.000 -1.270 -0.678
C6 0.000 1.270 -0.678
O7 0.000 0.000 2.690
O8 0.000 0.000 -2.690
H9 0.000 2.194 1.275
H10 0.000 -2.194 1.275
H11 0.000 -2.194 -1.275
H12 0.000 2.194 -1.275

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.90711.48801.48802.48082.48081.23624.14332.20182.20183.50133.5013
C22.90712.48082.48081.48801.48804.14331.23623.50133.50132.20182.2018
C31.48802.48082.53942.87841.35532.37923.59881.10083.51533.97652.1603
C41.48802.48082.53941.35532.87842.37923.59883.51531.10082.16033.9765
C52.48081.48802.87841.35532.53943.59882.37923.97652.16031.10083.5153
C62.48081.48801.35532.87842.53943.59882.37922.16033.97653.51531.1008
O71.23624.14332.37922.37923.59883.59885.37952.61122.61124.53134.5313
O84.14331.23623.59883.59882.37922.37925.37954.53134.53132.61122.6112
H92.20183.50131.10083.51533.97652.16032.61124.53134.38905.07572.5494
H102.20183.50133.51531.10082.16033.97652.61124.53134.38902.54945.0757
H113.50132.20183.97652.16031.10083.51534.53132.61125.07572.54944.3890
H123.50132.20182.16033.97653.51531.10084.53132.61122.54945.07574.3890

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.428 C1 C3 H9 115.725
C1 C4 C5 121.428 C1 C4 H10 115.725
C2 C5 C4 121.428 C2 C5 H11 115.725
C2 C6 C3 121.428 C2 C6 H12 115.725
C3 C1 C4 117.144 C3 C1 O7 121.428
C3 C6 H12 122.847 C4 C1 O7 121.428
C4 C5 H11 122.847 C5 C2 C6 117.144
C5 C2 O8 121.428 C5 C4 H10 122.847
C6 C2 O8 121.428 C6 C3 H9 122.847
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.072      
2 C 0.072      
3 C 0.037      
4 C 0.037      
5 C 0.037      
6 C 0.037      
7 O -0.168      
8 O -0.168      
9 H 0.012      
10 H 0.012      
11 H 0.012      
12 H 0.012      


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 -44.993 0.000 0.000
y 0.000 -37.822 0.000
z 0.000 0.000 -58.936
Traceless
 xyz
x 3.386 0.000 0.000
y 0.000 14.143 0.000
z 0.000 0.000 -17.529
Polar
3z2-r2-35.057
x2-y2-7.172
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.017 0.000 0.000
y 0.000 9.997 0.000
z 0.000 0.000 15.819


<r2> (average value of r2) Å2
<r2> 246.098
(<r2>)1/2 15.688