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All results from a given calculation for C6H4O2 (parabenzoquinone)

using model chemistry: MP2=FULL/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP2=FULL/cc-pVTZ
 hartrees
Energy at 0K-380.856021
Energy at 298.15K-380.860571
Nuclear repulsion energy324.184801
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 MP2=FULL/cc-pVTZ
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 3260 3095 0.00      
2 Ag 1711 1625 0.00      
3 Ag 1657 1573 0.00      
4 Ag 1173 1114 0.00      
5 Ag 797 756 0.00      
6 Ag 453 430 0.00      
7 Au 1040 988 0.00      
8 Au 348 330 0.00      
9 B1g 782 742 0.00      
10 B1u 3229 3066 0.06      
11 B1u 1708 1622 178.34      
12 B1u 1390 1320 7.80      
13 B1u 964 915 12.49      
14 B1u 767 729 0.19      
15 B2g 1043 990 0.00      
16 B2g 819 778 0.00      
17 B2g 243 231 0.00      
18 B2u 3257 3093 1.42      
19 B2u 1649 1565 23.11      
20 B2u 1351 1283 71.43      
21 B2u 1097 1042 38.87      
22 B2u 413 392 23.26      
23 B3g 3232 3068 0.00      
24 B3g 1426 1354 0.00      
25 B3g 1253 1189 0.00      
26 B3g 610 579 0.00      
27 B3g 450 427 0.00      
28 B3u 931 884 73.01      
29 B3u 525 498 4.90      
30 B3u 93 89 12.46      

Unscaled Zero Point Vibrational Energy (zpe) 18835.1 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 17882.1 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 MP2=FULL/cc-pVTZ
ABC
0.17817 0.05568 0.04242

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVTZ

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.432
C2 0.000 0.000 -1.432
C3 0.000 1.256 0.669
C4 0.000 -1.256 0.669
C5 0.000 -1.256 -0.669
C6 0.000 1.256 -0.669
O7 0.000 0.000 2.657
O8 0.000 0.000 -2.657
H9 0.000 2.164 1.247
H10 0.000 -2.164 1.247
H11 0.000 -2.164 -1.247
H12 0.000 2.164 -1.247

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 O8 H9 H10 H11 H12
C12.86431.46951.46952.44832.44831.22444.08872.17242.17243.44403.4440
C22.86432.44832.44831.46951.46954.08871.22443.44403.44402.17242.1724
C31.46952.44832.51212.84661.33882.35083.55521.07633.46893.92062.1205
C41.46952.44832.51211.33882.84662.35083.55523.46891.07632.12053.9206
C52.44831.46952.84661.33882.51213.55522.35083.92062.12051.07633.4689
C62.44831.46951.33882.84662.51213.55522.35082.12053.92063.46891.0763
O71.22444.08872.35082.35083.55523.55525.31302.58312.58314.46324.4632
O84.08871.22443.55523.55522.35082.35085.31304.46324.46322.58312.5831
H92.17243.44401.07633.46893.92062.12052.58314.46324.32904.99572.4934
H102.17243.44403.46891.07632.12053.92062.58314.46324.32902.49344.9957
H113.44402.17243.92062.12051.07633.46894.46322.58314.99572.49344.3290
H123.44402.17242.12053.92063.46891.07634.46322.58312.49344.99574.3290

picture of parabenzoquinone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C6 121.269 C1 C3 H9 116.295
C1 C4 C5 121.269 C1 C4 H10 116.295
C2 C5 C4 121.269 C2 C5 H11 116.295
C2 C6 C3 121.269 C2 C6 H12 116.295
C3 C1 C4 117.461 C3 C1 O7 121.269
C3 C6 H12 122.436 C4 C1 O7 121.269
C4 C5 H11 122.436 C5 C2 C6 117.461
C5 C2 O8 121.269 C5 C4 H10 122.436
C6 C2 O8 121.269 C6 C3 H9 122.436
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability