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 C5H8 (1,3-Pentadiene, (Z)-)

using model chemistry: QCISD/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-31G**
 hartrees
Energy at 0K-194.712045
Energy at 298.15K-194.719425
HF Energy-193.968773
Nuclear repulsion energy155.300323
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/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 A' 3309 3115 19.71      
2 A' 3244 3054 19.55      
3 A' 3227 3038 34.40      
4 A' 3215 3027 7.55      
5 A' 3209 3021 12.63      
6 A' 3199 3011 1.32      
7 A' 3101 2919 28.41      
8 A' 1776 1672 4.02      
9 A' 1703 1604 1.11      
10 A' 1552 1461 4.14      
11 A' 1518 1429 7.10      
12 A' 1474 1387 2.07      
13 A' 1432 1348 2.58      
14 A' 1356 1277 1.49      
15 A' 1320 1243 0.72      
16 A' 1218 1146 0.70      
17 A' 1090 1026 0.09      
18 A' 988 930 6.05      
19 A' 913 859 0.92      
20 A' 621 584 3.73      
21 A' 391 368 2.70      
22 A' 227 213 0.26      
23 A" 3162 2977 25.21      
24 A" 1540 1450 4.13      
25 A" 1091 1027 1.51      
26 A" 1033 972 13.81      
27 A" 984 926 3.49      
28 A" 923 869 32.57      
29 A" 796 749 9.74      
30 A" 635 597 19.53      
31 A" 350 329 0.12      
32 A" 114 107 0.00      
33 A" 103 97 0.36      

Unscaled Zero Point Vibrational Energy (zpe) 25406.0 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 23917.2 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/6-31G**
ABC
0.52889 0.08766 0.07626

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.397 0.150 0.000
C2 1.106 -0.220 0.000
C3 0.000 0.742 0.000
C4 -1.315 0.456 0.000
C5 -1.957 -0.904 0.000
H6 2.687 1.194 0.000
H7 3.197 -0.578 0.000
H8 0.864 -1.277 0.000
H9 0.295 1.787 0.000
H10 -2.009 1.292 0.000
H11 -1.229 -1.713 0.000
H12 -2.595 -1.025 0.879
H13 -2.595 -1.025 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.34302.46933.72534.48011.08341.08142.09442.66504.55184.07685.20335.2033
C21.34301.46622.51453.13872.12122.12161.08392.16553.46282.77153.88823.8882
C32.46931.46621.34612.55722.72513.45912.19581.08622.08282.74533.26003.2600
C43.72532.51451.34611.50404.07024.62992.78442.08911.08582.17082.14562.1456
C54.48013.13872.55721.50405.09625.16502.84553.50922.19641.08821.09251.0925
H61.08342.12122.72514.07025.09621.84323.07062.46524.69734.87725.79635.7963
H71.08142.12163.45914.62995.16501.84322.43623.74425.53194.56995.87585.8758
H82.09441.08392.19582.78442.84553.07062.43623.11663.85372.13793.57753.5775
H92.66502.16551.08622.08913.50922.46523.74423.11662.35643.81754.12704.1270
H104.55183.46282.08281.08582.19644.69735.53193.85372.35643.10422.54622.5462
H114.07682.77152.74532.17081.08824.87724.56992.13793.81753.10421.76371.7637
H125.20333.88823.26002.14561.09255.79635.87583.57754.12702.54621.76371.7574
H135.20333.88823.26002.14561.09255.79635.87583.57754.12702.54621.76371.7574

picture of 1,3-Pentadiene, (Z)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 122.983 C1 C2 H8 118.922
C2 C1 H6 121.532 C2 C1 H7 121.736
C2 C3 C4 126.732 C2 C3 H9 115.271
C3 C2 H8 118.095 C3 C4 C5 127.505
C3 C4 H10 117.443 C4 C3 H9 117.998
C4 C5 H11 112.756 C4 C5 H12 110.443
C4 C5 H13 110.443 C5 C4 H10 115.052
H6 C1 H7 116.733 H11 C5 H12 107.952
H11 C5 H13 107.952 H12 C5 H13 107.085
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability