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 C6H8 (1,4-Cyclohexadiene)

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1Ag
Energy calculated at TPSSh/6-31G(2df,p)
 hartrees
Energy at 0K-233.456552
Energy at 298.15K-233.465154
HF Energy-233.456552
Nuclear repulsion energy217.899694
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 TPSSh/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 Ag 3165 3054 0.00      
2 Ag 2977 2872 0.00      
3 Ag 1753 1692 0.00      
4 Ag 1473 1422 0.00      
5 Ag 1225 1182 0.00      
6 Ag 860 829 0.00      
7 Ag 529 510 0.00      
8 Au 1206 1164 0.00      
9 Au 1004 969 0.00      
10 Au 379 366 0.00      
11 B1g 3139 3029 0.00      
12 B1g 1397 1348 0.00      
13 B1g 1357 1309 0.00      
14 B1g 1044 1007 0.00      
15 B1g 566 546 0.00      
16 B1u 2986 2881 56.73      
17 B1u 993 958 21.02      
18 B1u 629 607 46.93      
19 B1u 119 115 0.69      
20 B2g 2987 2882 0.00      
21 B2g 1016 981 0.00      
22 B2g 969 935 0.00      
23 B2g 407 392 0.00      
24 B2u 3162 3052 92.09      
25 B2u 1708 1648 6.97      
26 B2u 1382 1334 0.29      
27 B2u 1165 1125 0.01      
28 B2u 948 915 0.00      
29 B3g 1217 1174 0.00      
30 B3g 725 700 0.00      
31 B3u 3139 3029 22.12      
32 B3u 2978 2874 105.05      
33 B3u 1477 1426 2.30      
34 B3u 1440 1389 0.01      
35 B3u 965 931 0.15      
36 B3u 895 863 10.29      

Unscaled Zero Point Vibrational Energy (zpe) 26688.4 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 25754.3 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 TPSSh/6-31G(2df,p)
ABC
0.17242 0.16310 0.08644

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.500 0.000 0.000
C2 -1.500 0.000 0.000
C3 -0.667 1.252 0.000
C4 0.667 1.252 0.000
C5 -0.667 -1.252 0.000
C6 0.667 -1.252 0.000
H7 1.207 -2.197 0.000
H8 -1.207 -2.197 0.000
H9 1.207 2.197 0.000
H10 -1.207 2.197 0.000
H11 2.176 0.000 0.870
H12 -2.176 0.000 0.870
H13 2.176 0.000 -0.870
H14 -2.176 0.000 -0.870

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C13.00032.50261.50432.50261.50432.21613.48602.21613.48601.10203.77811.10203.7781
C23.00031.50432.50261.50432.50263.48602.21613.48602.21613.77811.10203.77811.1020
C32.50261.50431.33322.50442.83723.92473.49082.09791.08793.22612.14583.22612.1458
C41.50432.50261.33322.83722.50443.49083.92471.08792.09792.14583.22612.14583.2261
C52.50261.50432.50442.83721.33322.09791.08793.92473.49083.22612.14583.22612.1458
C61.50432.50262.83722.50441.33321.08792.09793.49083.92472.14583.22612.14583.2261
H72.21613.48603.92473.49082.09791.08792.41344.39325.01242.55394.12642.55394.1264
H83.48602.21613.49083.92471.08792.09792.41345.01244.39324.12642.55394.12642.5539
H92.21613.48602.09791.08793.92473.49084.39325.01242.41342.55394.12642.55394.1264
H103.48602.21611.08792.09793.49083.92475.01244.39322.41344.12642.55394.12642.5539
H111.10203.77813.22612.14583.22612.14582.55394.12642.55394.12644.35271.74044.6877
H123.77811.10202.14583.22612.14583.22614.12642.55394.12642.55394.35274.68771.7404
H131.10203.77813.22612.14583.22612.14582.55394.12642.55394.12641.74044.68774.3527
H143.77811.10202.14583.22612.14583.22614.12642.55394.12642.55394.68771.74044.3527

picture of 1,4-Cyclohexadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C4 C3 123.650 C1 C4 H9 116.584
C1 C6 C5 123.650 C1 C6 H7 116.584
C2 C3 C4 123.650 C2 C3 H10 116.584
C2 C5 C6 123.650 C2 C5 H8 116.584
C3 C2 C5 112.701 C3 C2 H12 109.876
C3 C2 H14 109.876 C3 C4 H9 119.766
C4 C1 C6 112.701 C4 C1 H11 109.876
C4 C1 H13 109.876 C4 C3 H10 119.766
C5 C2 H12 109.876 C5 C2 H14 109.876
C5 C6 H7 119.766 C6 C1 H11 109.876
C6 C1 H13 109.876 C6 C5 H8 119.766
H11 C1 H13 104.304 H12 C2 H14 104.304
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability