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

using model chemistry: QCISD/3-21G

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/3-21G
 hartrees
Energy at 0K-231.131445
Energy at 298.15K-231.140020
HF Energy-230.539130
Nuclear repulsion energy215.426400
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/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 3144 3047 0.00      
2 Ag 2996 2904 0.00      
3 Ag 1725 1672 0.00      
4 Ag 1557 1509 0.00      
5 Ag 1278 1239 0.00      
6 Ag 823 797 0.00      
7 Ag 552 535 0.00      
8 Au 1278 1239 0.00      
9 Au 1002 971 0.00      
10 Au 372 361 0.00      
11 B1g 3114 3019 0.00      
12 B1g 1439 1394 0.00      
13 B1g 1389 1346 0.00      
14 B1g 1052 1019 0.00      
15 B1g 587 569 0.00      
16 B1u 3014 2921 43.33      
17 B1u 1029 997 18.23      
18 B1u 649 629 72.83      
19 B1u 83 81 0.44      
20 B2g 3014 2921 0.00      
21 B2g 1035 1003 0.00      
22 B2g 979 949 0.00      
23 B2g 381 369 0.00      
24 B2u 3140 3043 71.26      
25 B2u 1690 1638 0.88      
26 B2u 1394 1351 1.76      
27 B2u 1234 1196 0.80      
28 B2u 917 889 0.50      
29 B3g 1280 1240 0.00      
30 B3g 735 713 0.00      
31 B3u 3116 3020 14.04      
32 B3u 2997 2905 55.70      
33 B3u 1563 1514 3.14      
34 B3u 1475 1429 0.13      
35 B3u 997 966 0.95      
36 B3u 861 834 5.89      

Unscaled Zero Point Vibrational Energy (zpe) 26944.6 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 26114.7 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/3-21G
ABC
0.16775 0.15950 0.08434

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.523 0.000 0.000
C2 -1.523 0.000 0.000
C3 -0.672 1.271 0.000
C4 0.672 1.271 0.000
C5 -0.672 -1.271 0.000
C6 0.672 -1.271 0.000
H7 1.217 -2.217 0.000
H8 -1.217 -2.217 0.000
H9 1.217 2.217 0.000
H10 -1.217 2.217 0.000
H11 2.184 0.000 0.884
H12 -2.184 0.000 0.884
H13 2.184 0.000 -0.884
H14 -2.184 0.000 -0.884

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C13.04552.53621.52932.53621.52932.23823.52472.23823.52471.10463.81131.10463.8113
C23.04551.52932.53621.52932.53623.52472.23823.52472.23823.81131.10463.81131.1046
C32.53621.52931.34412.54162.87523.96683.53042.11301.09223.24922.16443.24922.1644
C41.52932.53621.34412.87522.54163.53043.96681.09222.11302.16443.24922.16443.2492
C52.53621.52932.54162.87521.34412.11301.09223.96683.53043.24922.16443.24922.1644
C61.52932.53622.87522.54161.34411.09222.11303.53043.96682.16443.24922.16443.2492
H72.23823.52473.96683.53042.11301.09222.43424.43465.05872.57574.15562.57574.1556
H83.52472.23823.53043.96681.09222.11302.43425.05874.43464.15562.57574.15562.5757
H92.23823.52472.11301.09223.96683.53044.43465.05872.43422.57574.15562.57574.1556
H103.52472.23821.09222.11303.53043.96685.05874.43462.43424.15562.57574.15562.5757
H111.10463.81133.24922.16443.24922.16442.57574.15562.57574.15564.36891.76904.7135
H123.81131.10462.16443.24922.16443.24924.15562.57574.15562.57574.36894.71351.7690
H131.10463.81133.24922.16443.24922.16442.57574.15562.57574.15561.76904.71354.3689
H143.81131.10462.16443.24922.16443.24924.15562.57574.15562.57574.71351.76904.3689

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 123.799 C1 C4 H9 116.264
C1 C6 C5 123.799 C1 C6 H7 116.264
C2 C3 C4 123.799 C2 C3 H10 116.264
C2 C5 C6 123.799 C2 C5 H8 116.264
C3 C2 C5 112.403 C3 C2 H12 109.465
C3 C2 H14 109.465 C3 C4 H9 119.937
C4 C1 C6 112.403 C4 C1 H11 109.465
C4 C1 H13 109.465 C4 C3 H10 119.937
C5 C2 H12 109.465 C5 C2 H14 109.465
C5 C6 H7 119.937 C6 C1 H11 109.465
C6 C1 H13 109.465 C6 C5 H8 119.937
H11 C1 H13 106.398 H12 C2 H14 106.398
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at QCISD/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.492     0.000
2 C -0.492     0.000
3 C -0.199     0.000
4 C -0.199     0.000
5 C -0.199     0.000
6 C -0.199     0.000
7 H 0.219     0.000
8 H 0.219     0.000
9 H 0.219     0.000
10 H 0.219     0.000
11 H 0.225     0.000
12 H 0.225     0.000
13 H 0.225     0.000
14 H 0.225     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> 148.153
(<r2>)1/2 12.172