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 (1,4-Pentadiene)

using model chemistry: PBEPBE/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at PBEPBE/3-21G
 hartrees
Energy at 0K-193.953994
Energy at 298.15K-193.961440
Nuclear repulsion energy154.294629
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 PBEPBE/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 3163 3134 15.31      
2 A 3088 3060 3.82      
3 A 3076 3048 2.84      
4 A 2965 2938 17.30      
5 A 1671 1656 0.33      
6 A 1478 1464 10.66      
7 A 1455 1441 0.17      
8 A 1313 1301 0.01      
9 A 1263 1252 0.02      
10 A 1078 1068 0.07      
11 A 1007 998 12.95      
12 A 923 914 44.14      
13 A 900 892 14.01      
14 A 668 662 10.42      
15 A 369 366 0.33      
16 A 305 302 0.52      
17 A 80 79 0.06      
18 A 3163 3134 19.98      
19 A 3088 3060 10.53      
20 A 3076 3048 18.40      
21 A 3011 2984 9.10      
22 A 1652 1637 19.47      
23 A 1450 1436 4.00      
24 A 1316 1304 0.70      
25 A 1295 1283 1.69      
26 A 1152 1142 4.32      
27 A 1006 997 15.05      
28 A 942 934 3.57      
29 A 920 912 46.82      
30 A 889 881 13.82      
31 A 597 591 16.98      
32 A 453 448 2.53      
33 A 94 94 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24451.3 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 24228.8 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 PBEPBE/3-21G
ABC
0.63020 0.07841 0.07770

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.698
C2 0.000 1.249 -0.169
C3 0.000 -1.249 -0.169
C4 0.992 2.152 -0.199
C5 -0.992 -2.152 -0.199
H6 -0.897 -0.010 1.348
H7 0.897 0.010 1.348
H8 -0.877 1.367 -0.818
H9 0.877 -1.367 -0.818
H10 0.956 3.029 -0.851
H11 -0.956 -3.029 -0.851
H12 1.879 2.046 0.436
H13 -1.879 -2.046 0.436

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.52111.52112.53342.53341.10781.10782.22262.22263.53433.53432.78982.7898
C21.52112.49851.34123.54272.16682.15471.09762.83512.13244.43672.12853.8411
C31.52112.49853.54271.34122.15472.16682.83511.09764.43672.13243.84112.1285
C42.53341.34123.54274.73853.26132.64332.11963.57501.09415.57331.09595.1246
C52.53343.54271.34124.73852.64333.26133.57502.11965.57331.09415.12461.0959
H61.10782.16682.15473.26132.64331.79412.56783.11194.18473.73563.57262.4367
H71.10782.15472.16682.64333.26131.79413.11192.56783.73564.18472.43673.5726
H82.22261.09762.83512.11963.57502.56783.11193.24922.47474.39753.10323.7719
H92.22262.83511.09763.57502.11963.11192.56783.24924.39752.47473.77193.1032
H103.53432.13244.43671.09415.57334.18473.73562.47474.39756.35311.86455.9540
H113.53434.43672.13245.57331.09413.73564.18474.39752.47476.35315.95401.8645
H122.78982.12853.84111.09595.12463.57262.43673.10323.77191.86455.95405.5549
H132.78983.84112.12855.12461.09592.43673.57263.77193.10325.95401.86455.5549

picture of 1,4-Pentadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 124.407 C1 C2 H8 115.196
C1 C3 C5 124.407 C1 C3 H9 115.196
C2 C1 C3 110.429 C2 C1 H6 110.030
C2 C1 H7 109.085 C2 C4 H10 121.906
C2 C4 H12 121.376 C3 C1 H6 109.085
C3 C1 H7 110.030 C3 C5 H11 121.906
C3 C5 H13 121.376 C4 C2 H8 120.377
C5 C3 H9 120.377 H6 C1 H7 108.146
H10 C4 H12 116.717 H11 C5 H13 116.717
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.523      
2 C -0.149      
3 C -0.149      
4 C -0.399      
5 C -0.399      
6 H 0.221      
7 H 0.221      
8 H 0.203      
9 H 0.203      
10 H 0.197      
11 H 0.197      
12 H 0.190      
13 H 0.190      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.040 0.040
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.253 1.154 0.000
y 1.154 -31.615 0.000
z 0.000 0.000 -32.267
Traceless
 xyz
x 1.688 1.154 0.000
y 1.154 -0.356 0.000
z 0.000 0.000 -1.333
Polar
3z2-r2-2.665
x2-y21.363
xy1.154
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.671 3.157 0.000
y 3.157 9.515 0.000
z 0.000 0.000 5.014


<r2> (average value of r2) Å2
<r2> 158.734
(<r2>)1/2 12.599