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All results from a given calculation for C8H8 (cyclooctatetraene)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-306.507755
Energy at 298.15K-306.515553
HF Energy-305.801010
Nuclear repulsion energy323.427094
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 MP2/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3176 3022 0.00      
2 A1 1673 1591 0.00      
3 A1 1297 1234 0.00      
4 A1 891 848 0.00      
5 A1 771 733 0.00      
6 A1 190 181 0.00      
7 A2 3140 2987 0.00      
8 A2 1445 1375 0.00      
9 A2 994 945 0.00      
10 A2 958 911 0.00      
11 A2 231 220 0.00      
12 B1 3147 2994 0.00      
13 B1 1494 1422 0.00      
14 B1 1042 991 0.00      
15 B1 965 918 0.00      
16 B1 679 646 0.00      
17 B1 243 231 0.00      
18 B2 3164 3010 37.41      
19 B2 1662 1581 3.16      
20 B2 1278 1216 0.82      
21 B2 706 671 90.67      
22 B2 301 286 2.09      
23 E 3170 3015 50.68      
23 E 3170 3015 50.68      
24 E 3143 2990 2.03      
24 E 3143 2990 2.03      
25 E 1661 1580 0.52      
25 E 1661 1580 0.52      
26 E 1478 1406 0.40      
26 E 1478 1406 0.40      
27 E 1304 1240 0.24      
27 E 1304 1240 0.24      
28 E 991 943 0.03      
28 E 991 943 0.03      
29 E 970 922 6.23      
29 E 970 922 6.23      
30 E 817 778 22.35      
30 E 817 778 22.35      
31 E 647 616 20.75      
31 E 647 616 20.75      
32 E 361 344 2.57      
32 E 361 344 2.57      

Unscaled Zero Point Vibrational Energy (zpe) 29263.8 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 27838.7 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 MP2/3-21G*
ABC
0.08967 0.08967 0.05218

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.675 1.537 0.426
C2 -0.675 1.537 0.426
C3 0.675 -1.537 0.426
C4 -0.675 -1.537 0.426
C5 1.537 0.675 -0.426
C6 -1.537 0.675 -0.426
C7 1.537 -0.675 -0.426
C8 -1.537 -0.675 -0.426
H9 1.199 2.256 1.058
H10 -1.199 2.256 1.058
H11 1.199 -2.256 1.058
H12 -1.199 -2.256 1.058
H13 2.256 1.199 -1.058
H14 -2.256 1.199 -1.058
H15 2.256 -1.199 -1.058
H16 -2.256 -1.199 -1.058

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14 H15 H16
C11.34973.07353.35681.48762.52222.52223.24191.09092.10383.88014.27682.19473.30243.49064.2748
C21.34973.35683.07352.52221.48763.24192.52222.10381.09094.27683.88013.30242.19474.27483.4906
C33.07353.35681.34972.52223.24191.48762.52223.88014.27681.09092.10383.49064.27482.19473.3024
C43.35683.07351.34973.24192.52222.52221.48764.27683.88012.10381.09094.27483.49063.30242.1947
C51.48762.52222.52223.24193.07351.34973.35682.19473.49063.30244.27481.09093.88012.10384.2768
C62.52221.48763.24192.52223.07353.35681.34973.49062.19474.27483.30243.88011.09094.27682.1038
C72.52223.24191.48762.52221.34973.35683.07353.30244.27482.19473.49062.10384.27681.09093.8801
C83.24192.52222.52221.48763.35681.34973.07354.27483.30243.49062.19474.27682.10383.88011.0909
H91.09092.10383.88014.27682.19473.49063.30244.27482.39734.51135.10862.59084.18654.18655.3237
H102.10381.09094.27683.88013.49062.19474.27483.30242.39735.10864.51134.18652.59085.32374.1865
H113.88014.27681.09092.10383.30244.27482.19473.49064.51135.10862.39734.18655.32372.59084.1865
H124.27683.88012.10381.09094.27483.30243.49062.19475.10864.51132.39735.32374.18654.18652.5908
H132.19473.30243.49064.27481.09093.88012.10384.27682.59084.18654.18655.32374.51132.39735.1086
H143.30242.19474.27483.49063.88011.09094.27682.10384.18652.59085.32374.18654.51135.10862.3973
H153.49064.27482.19473.30242.10384.27681.09093.88014.18655.32372.59084.18652.39735.10864.5113
H164.27483.49063.30242.19474.27682.10383.88011.09095.32374.18654.18652.59085.10862.39734.5113

picture of cyclooctatetraene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C6 125.407 C1 C2 H10 118.693
C1 C5 C7 125.407 C1 C5 H13 115.821
C2 C1 C5 125.407 C2 C1 H9 118.693
C2 C6 C8 125.407 C2 C6 H14 115.821
C3 C4 C8 125.407 C3 C4 H12 118.693
C3 C7 C5 125.407 C3 C7 H15 115.821
C4 C3 C7 125.407 C4 C3 H11 118.693
C4 C8 C6 125.407 C4 C8 H16 115.821
C5 C1 H9 115.821 C5 C7 H15 118.693
C6 C2 H10 115.821 C6 C8 H16 118.693
C7 C3 H11 115.821 C7 C5 H13 118.693
C8 C4 H12 115.821 C8 C6 H14 118.693
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability