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 (2,3-Pentadiene)

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at G4
 hartrees
Energy at 0K-195.136238
Energy at 298.15K-195.128767
HF Energy-195.310991
Nuclear repulsion energy152.266843
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 B3LYP/6-31G(2df,p)
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 3129 3020 17.19      
2 A 3112 3003 2.26      
3 A 3073 2965 22.18      
4 A 3023 2918 7.41      
5 A 1515 1462 2.34      
6 A 1484 1432 3.92      
7 A 1448 1398 0.14      
8 A 1404 1355 0.77      
9 A 1169 1128 0.00      
10 A 1091 1053 1.55      
11 A 1058 1021 0.09      
12 A 910 878 16.62      
13 A 825 796 0.02      
14 A 547 528 3.13      
15 A 295 285 1.11      
16 A 181 174 0.00      
17 A 140 135 1.21      
18 A 3129 3020 35.78      
19 A 3110 3001 1.81      
20 A 3073 2965 22.23      
21 A 3022 2917 72.25      
22 A 2081 2009 9.94      
23 A 1492 1440 5.27      
24 A 1483 1431 4.23      
25 A 1400 1351 8.10      
26 A 1313 1267 23.42      
27 A 1098 1059 2.48      
28 A 1056 1019 0.53      
29 A 961 927 13.44      
30 A 715 690 12.92      
31 A 576 555 10.72      
32 A 232 223 0.45      
33 A 162 157 1.01      

Unscaled Zero Point Vibrational Energy (zpe) 24653.0 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 23790.1 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 B3LYP/6-31G(2df,p)
ABC
0.57832 0.07444 0.07198

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.413
C2 0.000 1.304 0.412
C3 0.000 -1.304 0.412
C4 -0.875 2.171 -0.459
C5 0.875 -2.171 -0.459
H6 0.677 1.826 1.090
H7 -0.677 -1.826 1.090
H8 -1.512 2.822 0.151
H9 -0.267 2.826 -1.095
H10 -1.517 1.567 -1.103
H11 1.512 -2.822 0.151
H12 0.267 -2.826 -1.095
H13 1.517 -1.567 -1.103

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.30411.30412.49812.49812.06162.06163.21253.21472.65623.21253.21472.6562
C21.30412.60821.50893.68821.09063.27342.15842.15902.16054.40254.40503.5833
C31.30412.60823.68821.50893.27341.09064.40254.40503.58332.15842.15902.1605
C42.49811.50893.68824.68142.21954.29151.09671.09671.09215.56805.16534.4840
C52.49813.68821.50894.68144.29152.21955.56805.16534.48401.09671.09671.0921
H62.06161.09063.27342.21954.29153.89502.58142.58163.11284.81525.15614.1260
H72.06163.27341.09064.29152.21953.89504.81525.15614.12602.58142.58163.1128
H83.21252.15844.40251.09675.56802.58144.81521.76161.77476.40356.05175.4783
H93.21472.15904.40501.09675.16532.58165.15611.76161.77506.05175.67744.7413
H102.65622.16053.58331.09214.48403.11284.12601.77471.77505.47834.74134.3620
H113.21254.40252.15845.56801.09674.81522.58146.40356.05175.47831.76161.7747
H123.21474.40502.15905.16531.09675.15612.58166.05175.67744.74131.76161.7750
H132.65623.58332.16054.48401.09214.12603.11285.47834.74134.36201.77471.7750

picture of 2,3-Pentadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 125.028 C1 C2 H6 118.559
C1 C3 C5 125.028 C1 C3 H7 118.559
C2 C1 C3 179.966 C2 C4 H8 110.838
C2 C4 H9 110.876 C2 C4 H10 111.152
C3 C5 H11 110.838 C3 C5 H12 110.876
C3 C5 H13 111.152 C4 C2 H6 116.413
C5 C3 H7 116.413 H8 C4 H9 107.027
H8 C4 H10 108.393 H9 C4 H10 108.413
H11 C5 H12 107.027 H11 C5 H13 108.393
H12 C5 H13 108.413
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.397      
2 C -0.274      
3 C -0.274      
4 C -0.407      
5 C -0.407      
6 H 0.106      
7 H 0.106      
8 H 0.126      
9 H 0.126      
10 H 0.124      
11 H 0.126      
12 H 0.126      
13 H 0.124      


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 -0.182 0.182
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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


<r2> (average value of r2) Å2
<r2> 171.737
(<r2>)1/2 13.105