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

using model chemistry: MP2/CEP-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 MP2/CEP-31G*
 hartrees
Energy at 0K-38.249446
Energy at 298.15K-38.257887
HF Energy-37.536301
Nuclear repulsion energy113.051743
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-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 3206 3043 0.00      
2 Ag 3060 2905 0.00      
3 Ag 1746 1657 0.00      
4 Ag 1503 1427 0.00      
5 Ag 1221 1159 0.00      
6 Ag 872 828 0.00      
7 Ag 526 500 0.00      
8 Au 1227 1165 0.00      
9 Au 967 918 0.00      
10 Au 353 335 0.00      
11 B1g 3167 3007 0.00      
12 B1g 1435 1363 0.00      
13 B1g 1358 1290 0.00      
14 B1g 1067 1013 0.00      
15 B1g 555 527 0.00      
16 B1u 3107 2950 58.16      
17 B1u 1007 956 41.69      
18 B1u 642 610 102.54      
19 B1u 91 87 0.91      
20 B2g 3108 2950 0.00      
21 B2g 983 933 0.00      
22 B2g 953 904 0.00      
23 B2g 353 335 0.00      
24 B2u 3203 3041 86.10      
25 B2u 1706 1619 6.54      
26 B2u 1412 1341 0.03      
27 B2u 1172 1113 0.05      
28 B2u 965 916 0.40      
29 B3g 1240 1178 0.00      
30 B3g 736 699 0.00      
31 B3u 3167 3007 17.87      
32 B3u 3061 2906 84.45      
33 B3u 1504 1428 6.96      
34 B3u 1433 1360 0.70      
35 B3u 947 899 0.86      
36 B3u 920 873 10.87      

Unscaled Zero Point Vibrational Energy (zpe) 26986.9 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 25621.4 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-31G*
ABC
0.16849 0.15719 0.08387

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.529 0.000 0.000
C2 -1.529 0.000 0.000
C3 -0.685 1.266 0.000
C4 0.685 1.266 0.000
C5 -0.685 -1.266 0.000
C6 0.685 -1.266 0.000
H7 1.218 -2.226 0.000
H8 -1.218 -2.226 0.000
H9 1.218 2.226 0.000
H10 -1.218 2.226 0.000
H11 2.199 0.000 0.884
H12 -2.199 0.000 0.884
H13 2.199 0.000 -0.884
H14 -2.199 0.000 -0.884

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C13.05722.55031.52102.55031.52102.24803.53592.24803.53591.10893.83061.10893.8306
C23.05721.52102.55031.52102.55033.53592.24803.53592.24803.83061.10893.83061.1089
C32.55031.52101.37082.53182.87913.97763.53282.13231.09853.27132.16183.27132.1618
C41.52102.55031.37082.87912.53183.53283.97761.09852.13232.16183.27132.16183.2713
C52.55031.52102.53182.87911.37082.13231.09853.97763.53283.27132.16183.27132.1618
C61.52102.55032.87912.53181.37081.09852.13233.53283.97762.16183.27132.16183.2713
H72.24803.53593.97763.53282.13231.09852.43674.45305.07602.58824.17302.58824.1730
H83.53592.24803.53283.97761.09852.13232.43675.07604.45304.17302.58824.17302.5882
H92.24803.53592.13231.09853.97763.53284.45305.07602.43672.58824.17302.58824.1730
H103.53592.24801.09852.13233.53283.97765.07604.45302.43674.17302.58824.17302.5882
H111.10893.83063.27132.16183.27132.16182.58824.17302.58824.17304.39741.76714.7392
H123.83061.10892.16183.27132.16183.27134.17302.58824.17302.58824.39744.73921.7671
H131.10893.83063.27132.16183.27132.16182.58824.17302.58824.17301.76714.73924.3974
H143.83061.10892.16183.27132.16183.27134.17302.58824.17302.58824.73921.76714.3974

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 123.667 C1 C4 H9 117.309
C1 C6 C5 123.667 C1 C6 H7 117.309
C2 C3 C4 123.667 C2 C3 H10 117.309
C2 C5 C6 123.667 C2 C5 H8 117.309
C3 C2 C5 112.666 C3 C2 H12 109.573
C3 C2 H14 109.573 C3 C4 H9 119.023
C4 C1 C6 112.666 C4 C1 H11 109.573
C4 C1 H13 109.573 C4 C3 H10 119.023
C5 C2 H12 109.573 C5 C2 H14 109.573
C5 C6 H7 119.023 C6 C1 H11 109.573
C6 C1 H13 109.573 C6 C5 H8 119.023
H11 C1 H13 105.643 H12 C2 H14 105.643
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability