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: B3LYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3LYP/3-21G
 hartrees
Energy at 0K-194.229349
Energy at 298.15K-194.236438
Nuclear repulsion energy151.913775
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/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 3141 3030 16.62      
2 A 3121 3011 1.98      
3 A 3084 2976 21.70      
4 A 3040 2933 5.82      
5 A 1568 1513 2.57      
6 A 1555 1500 7.45      
7 A 1478 1426 2.38      
8 A 1447 1396 1.61      
9 A 1188 1146 0.04      
10 A 1118 1078 1.30      
11 A 1099 1061 0.41      
12 A 923 890 28.06      
13 A 826 797 0.00      
14 A 544 525 2.70      
15 A 294 284 1.31      
16 A 176 170 0.00      
17 A 136 132 1.98      
18 A 3141 3031 30.71      
19 A 3119 3010 1.37      
20 A 3084 2976 22.08      
21 A 3039 2932 59.74      
22 A 2085 2011 11.59      
23 A 1559 1504 7.82      
24 A 1554 1499 7.92      
25 A 1453 1402 5.03      
26 A 1356 1308 13.59      
27 A 1117 1078 10.97      
28 A 1094 1056 0.29      
29 A 954 920 10.54      
30 A 725 699 24.62      
31 A 579 558 11.08      
32 A 223 216 0.76      
33 A 159 153 1.46      

Unscaled Zero Point Vibrational Energy (zpe) 24987.9 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 24110.9 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/3-21G
ABC
0.56454 0.07451 0.07195

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.423
C2 0.000 1.307 0.420
C3 0.000 -1.307 0.420
C4 -0.887 2.164 -0.468
C5 0.887 -2.164 -0.468
H6 0.672 1.844 1.091
H7 -0.672 -1.844 1.091
H8 -1.530 2.813 0.141
H9 -0.277 2.812 -1.111
H10 -1.521 1.539 -1.102
H11 1.530 -2.813 0.141
H12 0.277 -2.812 -1.111
H13 1.521 -1.539 -1.102

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.30681.30682.50312.50312.07272.07273.21423.21502.64673.21423.21502.6467
C21.30682.61361.52023.69121.09053.29032.16472.16482.16384.40324.40273.5673
C31.30682.61363.69121.52023.29031.09054.40324.40273.56732.16472.16482.1638
C42.50311.52023.69124.67822.22774.30581.09751.09751.09295.56635.15084.4624
C52.50313.69121.52024.67824.30582.22775.56635.15084.46241.09751.09751.0929
H62.07271.09053.29032.22774.30583.92442.58622.58573.11564.82905.16494.1190
H72.07273.29031.09054.30582.22773.92444.82905.16494.11902.58622.58573.1156
H83.21422.16474.40321.09755.56632.58624.82901.77111.77966.40366.03895.4576
H93.21502.16484.40271.09755.15082.58575.16491.77111.77976.03895.65084.7075
H102.64672.16383.56731.09294.46243.11564.11901.77961.77975.45764.70754.3271
H113.21424.40322.16475.56631.09754.82902.58626.40366.03895.45761.77111.7796
H123.21504.40272.16485.15081.09755.16492.58576.03895.65084.70751.77111.7797
H132.64673.56732.16384.46241.09294.11903.11565.45764.70754.32711.77961.7797

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 124.430 C1 C2 H6 119.397
C1 C3 C5 124.430 C1 C3 H7 119.397
C2 C1 C3 179.740 C2 C4 H8 110.533
C2 C4 H9 110.538 C2 C4 H10 110.739
C3 C5 H11 110.533 C3 C5 H12 110.538
C3 C5 H13 110.739 C4 C2 H6 116.173
C5 C3 H7 116.173 H8 C4 H9 107.583
H8 C4 H10 108.678 H9 C4 H10 108.682
H11 C5 H12 107.583 H11 C5 H13 108.678
H12 C5 H13 108.682
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.189     -0.169
2 C -0.317     -0.070
3 C -0.317     -0.060
4 C -0.587     -0.209
5 C -0.587     -0.233
6 H 0.202     0.116
7 H 0.202     0.113
8 H 0.202     0.071
9 H 0.201     0.080
10 H 0.204     0.097
11 H 0.202     0.078
12 H 0.201     0.085
13 H 0.204     0.102


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 -0.220 0.220
CHELPG        
AIM        
ESP 0.000 0.006 -0.248 0.249


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.990 -0.251 0.000
y -0.251 -27.578 0.000
z 0.000 0.000 -32.186
Traceless
 xyz
x -2.108 -0.251 0.000
y -0.251 4.510 0.000
z 0.000 0.000 -2.402
Polar
3z2-r2-4.804
x2-y2-4.412
xy-0.251
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.268 -0.965 0.000
y -0.965 12.729 0.000
z 0.000 0.000 5.169


<r2> (average value of r2) Å2
<r2> 171.918
(<r2>)1/2 13.112