return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C6H6 (1,2,4,5-Hexatetraene)

using model chemistry: CISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-229.767205
Energy at 298.15K-229.771352
HF Energy-229.291683
Nuclear repulsion energy176.450195
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 CISD/3-21G*
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 3227 3016 0.00      
2 Ag 3211 3001 0.00      
3 Ag 2115 1977 0.00      
4 Ag 1596 1491 0.00      
5 Ag 1494 1396 0.00      
6 Ag 1219 1139 0.00      
7 Ag 1067 997 0.00      
8 Ag 996 931 0.00      
9 Ag 562 525 0.00      
10 Ag 235 219 0.00      
11 Au 3280 3065 8.99      
12 Au 1125 1051 0.41      
13 Au 983 918 46.97      
14 Au 517 483 5.27      
15 Au 338 315 15.81      
16 Au 75 70 0.23      
17 Bg 3280 3065 0.00      
18 Bg 1127 1053 0.00      
19 Bg 973 909 0.00      
20 Bg 724 676 0.00      
21 Bg 317 296 0.00      
22 Bu 3235 3023 8.62      
23 Bu 3211 3000 9.56      
24 Bu 2129 1989 67.26      
25 Bu 1576 1473 0.32      
26 Bu 1377 1287 7.64      
27 Bu 1158 1082 1.62      
28 Bu 997 932 127.40      
29 Bu 564 527 25.29      
30 Bu 125 117 0.91      

Unscaled Zero Point Vibrational Energy (zpe) 21416.1 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 20011.2 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 CISD/3-21G*
ABC
1.06181 0.04548 0.04440

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.330 0.663 0.000
C2 0.330 -0.663 0.000
C3 0.330 1.795 0.000
C4 -0.330 -1.795 0.000
C5 0.992 2.919 0.000
C6 -0.992 -2.919 0.000
H7 -1.415 0.673 0.000
H8 1.415 -0.673 0.000
H9 1.281 3.410 0.921
H10 1.281 3.410 -0.921
H11 -1.281 -3.410 0.921
H12 -1.281 -3.410 -0.921

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12
C11.48231.31042.45832.61473.64291.08442.19793.31493.31494.28314.2831
C21.48232.45831.31043.64292.61472.19791.08444.28314.28313.31493.3149
C31.31042.45833.65021.30434.89592.07502.69532.08812.08815.52605.5260
C42.45831.31043.65024.89591.30432.69532.07505.52605.52602.08812.0881
C52.61473.64291.30434.89596.16583.29233.61631.08311.08316.78756.7875
C63.64292.61474.89591.30436.16583.61633.29236.78756.78751.08311.0831
H71.08442.19792.07502.69533.29233.61633.13313.95073.95074.18744.1874
H82.19791.08442.69532.07503.61633.29233.13314.18744.18743.95073.9507
H93.31494.28312.08815.52601.08316.78753.95074.18741.84237.28537.5146
H103.31494.28312.08815.52601.08316.78753.95074.18741.84237.51467.2853
H114.28313.31495.52602.08816.78751.08314.18743.95077.28537.51461.8423
H124.28313.31495.52602.08816.78751.08314.18743.95077.51467.28531.8423

picture of 1,2,4,5-Hexatetraene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 123.232 C1 C2 H8 116.967
C1 C3 C5 179.799 C2 C1 C3 123.232
C2 C1 H7 116.967 C2 C4 C6 179.799
C3 C1 H7 119.801 C3 C5 H9 121.734
C3 C5 H10 121.734 C4 C2 H8 119.801
C4 C6 H11 121.734 C4 C6 H12 121.734
H9 C5 H10 116.532 H11 C6 H12 116.532
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability