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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: MP3=FULL/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 MP3=FULL/6-31+G**
 hartrees
Energy at 0K-380.434147
Energy at 298.15K-380.438297
HF Energy-379.250943
Nuclear repulsion energy322.436457
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 MP3=FULL/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 3309 3083 0.00      
2 Ag 1830 1705 0.00      
3 Ag 1728 1609 0.00      
4 Ag 1200 1118 0.00      
5 Ag 795 741 0.00      
6 Ag 460 429 0.00      
7 Au 975 908 0.00      
8 Au 313 291 0.00      
9 B1g 745 694 0.00      
10 B1u 3291 3066 0.39      
11 B1u 1826 1701 319.53      
12 B1u 1427 1329 3.20      
13 B1u 969 902 10.26      
14 B1u 775 722 0.28      
15 B2g 966 900 0.00      
16 B2g 620 577 0.00      
17 B2g 112 104 0.00      
18 B2u 3307 3081 3.53      
19 B2u 1706 1589 13.85      
20 B2u 1370 1276 82.88      
21 B2u 1118 1041 36.07      
22 B2u 421 392 28.54      
23 B3g 3291 3066 0.00      
24 B3g 1456 1356 0.00      
25 B3g 1285 1197 0.00      
26 B3g 618 575 0.00      
27 B3g 462 430 0.00      
28 B3u 875 815 93.29      
29 B3u 505 471 3.75      
30 B3u 83 77 14.96      

Unscaled Zero Point Vibrational Energy (zpe) 18917.2 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 17623.2 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 MP3=FULL/6-31+G**
ABC
0.17416 0.05537 0.04201

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31+G**

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.451
C2 0.000 0.000 -1.451
C3 0.000 1.272 0.672
C4 0.000 -1.272 0.672
C5 0.000 -1.272 -0.672
C6 0.000 1.272 -0.672
O7 0.000 0.000 2.668
O8 0.000 0.000 -2.668
H9 0.000 2.181 1.256
H10 0.000 -2.181 1.256
H11 0.000 -2.181 -1.256
H12 0.000 2.181 -1.256

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.90231.49221.49222.47502.47501.21724.11952.18992.18993.47693.4769
C22.90232.47502.47501.49221.49224.11951.21723.47693.47692.18992.1899
C31.49222.47502.54502.87771.34332.36773.57421.08063.50283.95542.1315
C41.49222.47502.54501.34332.87772.36773.57423.50281.08062.13153.9554
C52.47501.49222.87771.34332.54503.57422.36773.95542.13151.08063.5028
C62.47501.49221.34332.87772.54503.57422.36772.13153.95543.50281.0806
O71.21724.11952.36772.36773.57423.57425.33672.59832.59834.49014.4901
O84.11951.21723.57423.57422.36772.36775.33674.49014.49012.59832.5983
H92.18993.47691.08063.50283.95542.13152.59834.49014.36245.03442.5129
H102.18993.47693.50281.08062.13153.95542.59834.49014.36242.51295.0344
H113.47692.18993.95542.13151.08063.50284.49012.59835.03442.51294.3624
H123.47692.18992.13153.95543.50281.08064.49012.59832.51295.03444.3624

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.490 C1 C3 H9 115.748
C1 C4 C5 121.490 C1 C4 H10 115.748
C2 C5 C4 121.490 C2 C5 H11 115.748
C2 C6 C3 121.490 C2 C6 H12 115.748
C3 C1 C4 117.020 C3 C1 O7 121.490
C3 C6 H12 122.762 C4 C1 O7 121.490
C4 C5 H11 122.762 C5 C2 C6 117.020
C5 C2 O8 121.490 C5 C4 H10 122.762
C6 C2 O8 121.490 C6 C3 H9 122.762
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability