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

using model chemistry: MP2/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1Ag
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-38.325673
Energy at 298.15K-38.333962
HF Energy-37.559980
Nuclear repulsion energy113.989166
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 MP2/CEP-121G*
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 3196 3045 0.48      
2 A1 3078 2933 39.61      
3 A1 3036 2893 7.61      
4 A1 1718 1637 0.00      
5 A1 1509 1438 0.17      
6 A1 1229 1171 0.01      
7 A1 1003 956 35.36      
8 A1 863 823 0.16      
9 A1 632 603 80.66      
10 A1 527 502 2.38      
11 A1 44 42 0.62      
12 A2 3172 3022 0.00      
13 A2 1423 1356 0.00      
14 A2 1366 1301 0.00      
15 A2 1209 1152 0.00      
16 A2 1066 1015 0.00      
17 A2 924 881 0.00      
18 A2 567 541 0.00      
19 A2 348 332 0.00      
20 B1 3194 3044 84.32      
21 B1 1673 1594 6.43      
22 B1 1404 1338 0.11      
23 B1 1221 1164 0.06      
24 B1 1185 1129 0.08      
25 B1 956 911 0.57      
26 B1 712 678 0.74      
27 B2 3172 3022 18.14      
28 B2 3079 2934 10.71      
29 B2 3039 2895 76.25      
30 B2 1511 1439 6.03      
31 B2 1436 1368 0.24      
32 B2 999 952 2.88      
33 B2 947 903 0.00      
34 B2 921 878 0.01      
35 B2 909 866 8.09      
36 B2 302 288 0.19      

Unscaled Zero Point Vibrational Energy (zpe) 26785.2 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 25520.9 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 MP2/CEP-121G*
ABC
0.17004 0.16078 0.08555

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.508 0.076
C2 0.000 -1.508 0.076
C3 1.259 -0.675 -0.047
C4 1.259 0.675 -0.047
C5 -1.259 -0.675 -0.047
C6 -1.259 0.675 -0.047
H7 -2.206 1.208 -0.138
H8 -2.206 -1.208 -0.138
H9 2.206 1.208 -0.138
H10 2.206 -1.208 -0.138
H11 0.000 2.295 -0.692
H12 0.000 -2.295 -0.692
H13 0.000 2.039 1.042
H14 0.000 -2.039 1.042

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C13.01652.52341.51432.52341.51432.23653.50582.23653.50581.09993.88051.10183.6763
C23.01651.51432.52341.51432.52343.50582.23653.50582.23653.88051.09993.67631.1018
C32.52341.51431.35072.51742.85693.94463.50652.11031.09063.29032.15063.18392.1515
C41.51432.52341.35072.85692.51743.50653.94461.09062.11032.15063.29032.15153.1839
C52.52341.51432.51742.85691.35072.11031.09063.94463.50653.29032.15063.18392.1515
C61.51432.52342.85692.51741.35071.09062.11033.50653.94462.15063.29032.15153.1839
H72.23653.50583.94463.50652.11031.09062.41634.41185.03022.52084.17702.63614.0991
H83.50582.23653.50653.94461.09062.11032.41635.03024.41184.17702.52084.09912.6361
H92.23653.50582.11031.09063.94463.50654.41185.03022.41632.52084.17702.63614.0991
H103.50582.23651.09062.11033.50653.94465.03024.41182.41634.17702.52084.09912.6361
H111.09993.88053.29032.15063.29032.15062.52084.17702.52084.17704.59091.75264.6683
H123.88051.09992.15063.29032.15063.29034.17702.52084.17702.52084.59094.66831.7526
H131.10183.67633.18392.15153.18392.15152.63614.09912.63614.09911.75264.66834.0779
H143.67631.10182.15153.18392.15153.18394.09912.63614.09912.63614.66831.75264.0779

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 123.367 C1 C4 H9 117.388
C1 C6 C5 123.367 C1 C6 H7 117.388
C2 C3 C4 123.367 C2 C3 H10 117.388
C2 C5 C6 123.367 C2 C5 H8 117.388
C3 C2 C5 112.445 C3 C2 H12 109.685
C3 C2 H14 109.644 C3 C4 H9 119.245
C4 C1 C6 112.445 C4 C1 H11 109.685
C4 C1 H13 109.644 C4 C3 H10 119.245
C5 C2 H12 109.685 C5 C2 H14 109.644
C5 C6 H7 119.245 C6 C1 H11 109.685
C6 C1 H13 109.644 C6 C5 H8 119.245
H11 C1 H13 105.502 H12 C2 H14 105.502
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability