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All results from a given calculation for C6H6 (Dewar Benzene)

using model chemistry: QCISD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-231.543556
Energy at 298.15K 
HF Energy-230.589444
Nuclear repulsion energy208.641337
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 QCISD/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3267 3095 5.89      
2 A1 3163 2997 27.14      
3 A1 1636 1550 0.08      
4 A1 1207 1143 3.79      
5 A1 1063 1007 1.67      
6 A1 972 921 6.96      
7 A1 889 842 0.02      
8 A1 834 790 59.09      
9 A1 394 373 3.13      
10 A2 3233 3063 0.00      
11 A2 1321 1252 0.00      
12 A2 1222 1157 0.00      
13 A2 980 929 0.00      
14 A2 939 890 0.00      
15 A2 798 756 0.00      
16 A2 332 314 0.00      
17 B1 3264 3093 31.31      
18 B1 1612 1528 6.49      
19 B1 1250 1184 3.87      
20 B1 1123 1063 0.01      
21 B1 1030 976 0.40      
22 B1 744 705 35.88      
23 B2 3234 3064 18.48      
24 B2 3155 2989 14.92      
25 B2 1318 1249 33.18      
26 B2 1182 1120 3.13      
27 B2 969 918 5.42      
28 B2 941 891 3.76      
29 B2 858 813 7.59      
30 B2 502 475 5.98      

Unscaled Zero Point Vibrational Energy (zpe) 21715.9 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 20573.6 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 QCISD/6-31G(2df,p)
ABC
0.26044 0.14928 0.11647

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.786 0.528
C2 0.000 -0.786 0.528
H3 0.000 1.354 1.458
H4 0.000 -1.354 1.458
C5 -1.301 0.671 -0.267
C6 1.301 0.671 -0.267
C7 1.301 -0.671 -0.267
C8 -1.301 -0.671 -0.267
H9 -1.942 1.420 -0.714
H10 1.942 1.420 -0.714
H11 1.942 -1.420 -0.714
H12 -1.942 -1.420 -0.714

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 C7 C8 H9 H10 H11 H12
C11.57261.08932.33371.52931.52932.10932.10932.39072.39073.19083.1908
C21.57262.33371.08932.10932.10931.52931.52933.19083.19082.39072.3907
H31.08932.33372.70872.26602.26602.96132.96132.91412.91414.02304.0230
H42.33371.08932.70872.96132.96132.26602.26604.02304.02302.91412.9141
C51.52932.10932.26602.96132.60252.92811.34181.08233.35823.88432.2320
C61.52932.10932.26602.96132.60251.34182.92813.35821.08232.23203.8843
C72.10931.52932.96132.26602.92811.34182.60253.88432.23201.08233.3582
C82.10931.52932.96132.26601.34182.92812.60252.23203.88433.35821.0823
H92.39073.19082.91414.02301.08233.35823.88432.23203.88324.81082.8399
H102.39073.19082.91414.02303.35821.08232.23203.88433.88322.83994.8108
H113.19082.39074.02302.91413.88432.23201.08233.35824.81082.83993.8832
H123.19082.39074.02302.91412.23203.88433.35821.08232.83994.81083.8832

picture of Dewar Benzene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 121.432 C1 C2 H7 85.674
C1 C2 H8 85.674 C1 C5 H8 94.326
C1 C5 H9 131.772 C1 C6 H7 94.326
C1 C6 H10 131.772 C2 C1 C3 121.432
C2 C1 C5 85.674 C2 C1 C6 85.674
C2 H7 C6 94.326 C2 H7 H11 131.772
C2 H8 C5 94.326 C2 H8 H12 131.772
C3 C1 C5 118.880 C3 C1 C6 118.880
C4 C2 H7 118.880 C4 C2 H8 118.880
C5 C1 C6 116.613 C5 H8 H12 133.797
C6 H7 H11 133.797 H7 C6 H10 133.797
H8 C5 H9 133.797
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability