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 ((Z)-hexa-1,3,5-triene)

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-232.559790
Energy at 298.15K-232.566851
HF Energy-231.802282
Nuclear repulsion energy196.269142
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 MP2/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3306 3117 23.07      
2 A1 3235 3051 15.12      
3 A1 3211 3028 11.16      
4 A1 3207 3024 7.77      
5 A1 1730 1631 0.02      
6 A1 1644 1550 0.00      
7 A1 1471 1387 0.25      
8 A1 1378 1300 3.36      
9 A1 1321 1245 0.57      
10 A1 1128 1064 1.03      
11 A1 916 864 0.00      
12 A1 397 375 0.03      
13 A1 173 163 0.06      
14 A2 1020 962 0.00      
15 A2 938 884 0.00      
16 A2 907 856 0.00      
17 A2 712 671 0.00      
18 A2 321 303 0.00      
19 A2 131 123 0.00      
20 B1 1023 965 46.75      
21 B1 910 858 75.97      
22 B1 833 786 8.13      
23 B1 598 564 25.76      
24 B1 95 89 0.17      
25 B2 3306 3117 0.24      
26 B2 3221 3038 1.15      
27 B2 3208 3026 5.03      
28 B2 3188 3006 0.14      
29 B2 1705 1608 3.10      
30 B2 1527 1440 6.53      
31 B2 1418 1337 0.01      
32 B2 1336 1260 0.78      
33 B2 1244 1173 1.87      
34 B2 987 931 3.38      
35 B2 693 654 0.40      
36 B2 354 334 8.29      

Unscaled Zero Point Vibrational Energy (zpe) 26394.8 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 24890.3 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 MP2/6-31G*
ABC
0.49855 0.05229 0.04733

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.677 0.762
C2 0.000 -0.677 0.762
C3 0.000 1.549 -0.407
C4 0.000 -1.549 -0.407
C5 0.000 2.892 -0.317
C6 0.000 -2.892 -0.317
H7 0.000 1.191 1.724
H8 0.000 -1.191 1.724
H9 0.000 1.085 -1.392
H10 0.000 -1.085 -1.392
H11 0.000 3.400 0.645
H12 0.000 -3.400 0.645
H13 0.000 3.525 -1.200
H14 0.000 -3.525 -1.200

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.35481.45822.51492.46383.72931.09102.10202.19142.78232.72554.07953.45734.6372
C21.35482.51491.45823.72932.46382.10201.09102.78232.19144.07952.72554.63723.4573
C31.45822.51493.09881.34614.44282.16093.47181.08872.81202.12905.06032.12835.1356
C42.51491.45823.09884.44281.34613.47182.16092.81201.08875.06032.12905.13562.1283
C52.46383.72931.34614.44285.78502.65694.56542.10314.11981.08756.36601.08566.4776
C63.72932.46384.44281.34615.78504.56542.65694.11982.10316.36601.08756.47761.0856
H71.09102.10202.16093.47182.65694.56542.38273.11743.85842.45864.71693.74045.5486
H82.10201.09103.47182.16094.56542.65692.38273.85843.11744.71692.45865.54863.7404
H92.19142.78231.08872.81202.10314.11983.11743.85842.16933.08374.92572.44764.6133
H102.78232.19142.81201.08874.11982.10313.85843.11742.16934.92573.08374.61332.4476
H112.72554.07952.12905.06031.08756.36602.45864.71693.08374.92576.80081.84837.1664
H124.07952.72555.06032.12906.36601.08754.71692.45864.92573.08376.80087.16641.8483
H133.45734.63722.12835.13561.08566.47763.74045.54862.44764.61331.84837.16647.0494
H144.63723.45735.13562.12836.47761.08565.54863.74044.61332.44767.16641.84837.0494

picture of (Z)-hexa-1,3,5-triene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 126.726 C1 C2 H8 118.107
C1 C3 C5 122.887 C1 C3 H9 118.004
C2 C1 C3 126.726 C2 C1 H7 118.107
C2 C4 C6 122.887 C2 C4 H10 118.004
C3 C1 H7 115.166 C3 C5 H11 121.681
C3 C5 H13 121.779 C4 C2 H8 115.166
C4 C6 H12 121.681 C4 C6 H14 121.779
C5 C3 H9 119.109 C6 C4 H10 119.109
H11 C5 H13 116.540 H12 C6 H14 116.540
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability