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All results from a given calculation for C6H8 (1,4-Cyclohexadiene)

using model chemistry: QCISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1Ag
Energy calculated at QCISD/6-31G*
 hartrees
Energy at 0K-232.650131
Energy at 298.15K-232.658721
HF Energy-231.831518
Nuclear repulsion energy217.301142
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*
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 3191 3039 0.00      
2 Ag 3026 2882 0.00      
3 Ag 1789 1703 0.00      
4 Ag 1535 1461 0.00      
5 Ag 1257 1197 0.00      
6 Ag 877 835 0.00      
7 Ag 547 521 0.00      
8 Au 1243 1184 0.00      
9 Au 987 940 0.00      
10 Au 374 356 0.00      
11 B1g 3167 3016 0.00      
12 B1g 1450 1381 0.00      
13 B1g 1403 1337 0.00      
14 B1g 1081 1030 0.00      
15 B1g 582 554 0.00      
16 B1u 3046 2901 54.79      
17 B1u 1030 981 22.43      
18 B1u 644 614 58.06      
19 B1u 103 98 0.59      
20 B2g 3047 2902 0.00      
21 B2g 1024 975 0.00      
22 B2g 974 928 0.00      
23 B2g 371 354 0.00      
24 B2u 3189 3037 81.47      
25 B2u 1746 1662 3.21      
26 B2u 1433 1364 0.05      
27 B2u 1210 1153 0.08      
28 B2u 972 925 0.17      
29 B3g 1250 1191 0.00      
30 B3g 735 700 0.00      
31 B3u 3167 3016 17.72      
32 B3u 3027 2882 81.28      
33 B3u 1536 1463 2.85      
34 B3u 1474 1403 0.09      
35 B3u 987 940 0.82      
36 B3u 923 879 7.04      

Unscaled Zero Point Vibrational Energy (zpe) 27198.4 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 25901.1 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 QCISD/6-31G*
ABC
0.17152 0.16214 0.08597

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.505 0.000 0.000
C2 -1.505 0.000 0.000
C3 -0.670 1.255 0.000
C4 0.670 1.255 0.000
C5 -0.670 -1.255 0.000
C6 0.670 -1.255 0.000
H7 1.209 -2.204 0.000
H8 -1.209 -2.204 0.000
H9 1.209 2.204 0.000
H10 -1.209 2.204 0.000
H11 2.177 0.000 0.875
H12 -2.177 0.000 0.875
H13 2.177 0.000 -0.875
H14 -2.177 0.000 -0.875

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C13.01012.51091.50772.51091.50772.22383.49612.22383.49611.10293.78451.10293.7845
C23.01011.50772.51091.50772.51093.49612.22383.49612.22383.78451.10293.78451.1029
C32.51091.50771.33932.51032.84533.93633.50092.10451.09133.23172.14763.23172.1476
C41.50772.51091.33932.84532.51033.50093.93631.09132.10452.14763.23172.14763.2317
C52.51091.50772.51032.84531.33932.10451.09133.93633.50093.23172.14763.23172.1476
C61.50772.51092.84532.51031.33931.09132.10453.50093.93632.14763.23172.14763.2317
H72.22383.49613.93633.50092.10451.09132.41764.40795.02742.56124.13352.56124.1335
H83.49612.22383.50093.93631.09132.10452.41765.02744.40794.13352.56124.13352.5612
H92.22383.49612.10451.09133.93633.50094.40795.02742.41762.56124.13352.56124.1335
H103.49612.22381.09132.10453.50093.93635.02744.40792.41764.13352.56124.13352.5612
H111.10293.78453.23172.14763.23172.14762.56124.13352.56124.13354.35391.74924.6921
H123.78451.10292.14763.23172.14763.23174.13352.56124.13352.56124.35394.69211.7492
H131.10293.78453.23172.14763.23172.14762.56124.13352.56124.13351.74924.69214.3539
H143.78451.10292.14763.23172.14763.23174.13352.56124.13352.56124.69211.74924.3539

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 123.646 C1 C4 H9 116.747
C1 C6 C5 123.646 C1 C6 H7 116.747
C2 C3 C4 123.646 C2 C3 H10 116.747
C2 C5 C6 123.646 C2 C5 H8 116.747
C3 C2 C5 112.707 C3 C2 H12 109.727
C3 C2 H14 109.727 C3 C4 H9 119.607
C4 C1 C6 112.707 C4 C1 H11 109.727
C4 C1 H13 109.727 C4 C3 H10 119.607
C5 C2 H12 109.727 C5 C2 H14 109.727
C5 C6 H7 119.607 C6 C1 H11 109.727
C6 C1 H13 109.727 C6 C5 H8 119.607
H11 C1 H13 104.936 H12 C2 H14 104.936
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at QCISD/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.353     0.000
2 C -0.353     0.000
3 C -0.176     0.000
4 C -0.176     0.000
5 C -0.176     0.000
6 C -0.176     0.000
7 H 0.179     0.000
8 H 0.179     0.000
9 H 0.179     0.000
10 H 0.179     0.000
11 H 0.173     0.000
12 H 0.173     0.000
13 H 0.173     0.000
14 H 0.173     0.000


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 145.742
(<r2>)1/2 12.072