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/3-21G*

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/3-21G*
 hartrees
Energy at 0K-193.380417
Energy at 298.15K-193.387784
HF Energy-192.875732
Nuclear repulsion energy154.067779
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/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 A' 3197 3073 19.84      
2 A' 3142 3020 18.62      
3 A' 3128 3006 24.46      
4 A' 3115 2994 6.92      
5 A' 3107 2986 9.22      
6 A' 3094 2974 1.98      
7 A' 3021 2904 20.08      
8 A' 1698 1632 1.83      
9 A' 1648 1584 1.44      
10 A' 1571 1510 5.16      
11 A' 1516 1457 4.98      
12 A' 1478 1421 6.61      
13 A' 1448 1391 0.82      
14 A' 1369 1316 0.36      
15 A' 1328 1277 0.67      
16 A' 1202 1155 2.49      
17 A' 1098 1055 0.42      
18 A' 956 919 5.80      
19 A' 868 834 0.67      
20 A' 627 603 4.13      
21 A' 401 385 2.18      
22 A' 232 223 0.11      
23 A" 3065 2946 21.37      
24 A" 1568 1507 6.13      
25 A" 1111 1068 0.18      
26 A" 1016 977 15.24      
27 A" 981 943 4.59      
28 A" 936 899 44.23      
29 A" 790 759 12.10      
30 A" 627 603 30.73      
31 A" 349 335 0.29      
32 A" 115 111 0.02      
33 A" 95 92 0.36      

Unscaled Zero Point Vibrational Energy (zpe) 24948.1 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 23977.7 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 QCISD/3-21G*
ABC
0.51528 0.08657 0.07517

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.413 0.137 0.000
C2 1.112 -0.226 0.000
C3 0.000 0.753 0.000
C4 -1.323 0.473 0.000
C5 -1.973 -0.909 0.000
H6 2.716 1.186 0.000
H7 3.218 -0.597 0.000
H8 0.856 -1.287 0.000
H9 0.308 1.804 0.000
H10 -2.027 1.308 0.000
H11 -1.227 -1.714 0.000
H12 -2.611 -1.031 0.889
H13 -2.611 -1.031 -0.889

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.35042.49043.75084.50871.09171.08932.11022.68514.59234.08355.23385.2338
C21.35041.48212.53343.15972.13662.13791.09162.18363.49472.77233.91143.9114
C32.49041.48211.35222.57982.75003.48962.21271.09462.10212.75543.28483.2848
C43.75082.53341.35221.52724.10114.66492.80082.10471.09312.18882.17042.1704
C54.50873.15972.57981.52725.13535.19992.85383.54402.21831.09711.10121.1012
H61.09172.13662.75004.10115.13531.85223.09442.48614.74484.89435.83755.8375
H71.08932.13793.48964.66495.19991.85222.46063.77265.58064.58295.91195.9119
H82.11021.09162.21272.80082.85383.09442.46063.13923.87962.12623.58813.5881
H92.68512.18361.09462.10473.54402.48613.77263.13922.38713.83784.16454.1645
H104.59233.49472.10211.09312.21834.74485.58063.87962.38713.12652.56972.5697
H114.08352.77232.75542.18881.09714.89434.58292.12623.83783.12651.78101.7810
H125.23383.91143.28482.17041.10125.83755.91193.58814.16452.56971.78101.7785
H135.23383.91143.28482.17041.10125.83755.91193.58814.16452.56971.78101.7785

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 123.028 C1 C2 H8 119.189
C2 C1 H6 121.712 C2 C1 H7 122.027
C2 C3 C4 126.662 C2 C3 H9 115.043
C3 C2 H8 117.784 C3 C4 C5 127.157
C3 C4 H10 118.169 C4 C3 H9 118.295
C4 C5 H11 111.991 C4 C5 H12 110.281
C4 C5 H13 110.281 C5 C4 H10 114.674
H6 C1 H7 116.262 H11 C5 H12 108.223
H11 C5 H13 108.223 H12 C5 H13 107.709
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability