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-Butadiene, 2-methyl-)

using model chemistry: B3PW91/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/cc-pVTZ
 hartrees
Energy at 0K-195.304903
Energy at 298.15K-195.312567
Nuclear repulsion energy160.946584
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 B3PW91/cc-pVTZ
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' 3235 3111 12.07      
2 A' 3228 3104 10.24      
3 A' 3153 3032 2.92      
4 A' 3144 3023 14.43      
5 A' 3140 3020 3.34      
6 A' 3127 3006 16.16      
7 A' 3032 2916 18.16      
8 A' 1706 1641 2.25      
9 A' 1665 1602 28.33      
10 A' 1493 1436 6.91      
11 A' 1452 1396 2.80      
12 A' 1428 1373 3.02      
13 A' 1404 1350 7.95      
14 A' 1335 1284 0.91      
15 A' 1320 1269 0.19      
16 A' 1085 1043 3.85      
17 A' 1006 968 0.25      
18 A' 963 926 1.05      
19 A' 800 769 0.13      
20 A' 533 512 0.10      
21 A' 423 407 1.58      
22 A' 272 262 0.95      
23 A" 3087 2968 13.83      
24 A" 1473 1417 8.54      
25 A" 1065 1024 0.00      
26 A" 1031 991 15.67      
27 A" 939 903 39.92      
28 A" 927 892 43.04      
29 A" 791 760 0.50      
30 A" 646 621 0.04      
31 A" 410 395 9.66      
32 A" 198 190 0.43      
33 A" 162 156 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 24835.4 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 23881.7 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 B3PW91/cc-pVTZ
ABC
0.28705 0.14031 0.09591

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.591 1.722 0.000
C2 0.000 0.523 0.000
C3 -0.820 -0.686 0.000
C4 -0.366 -1.939 0.000
C5 1.492 0.380 0.000
H6 -1.671 1.817 0.000
H7 -0.016 2.640 0.000
H8 -1.894 -0.519 0.000
H9 0.692 -2.170 0.000
H10 -1.047 -2.781 0.000
H11 1.979 1.355 0.000
H12 1.834 -0.173 0.879
H13 1.834 -0.173 -0.879

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.33752.41933.66852.47821.08381.08312.59234.09854.52622.59623.20083.2008
C21.33751.46072.48891.49902.11342.11792.16152.78023.46532.14682.14932.1493
C32.41931.46071.33302.54662.64353.42221.08672.11902.10703.46432.84272.8427
C43.66852.48891.33302.97223.97644.59302.08641.08321.08254.04352.95502.9550
C52.47821.49902.54662.97223.47402.71733.50372.67294.05461.08931.09321.0932
H61.08382.11342.64353.97643.47401.84802.34634.63464.63993.67884.12494.1249
H71.08312.11793.42224.59302.71731.84803.67514.86235.51832.37353.48013.4801
H82.59232.16151.08672.08643.50372.34633.67513.06862.41554.30243.84583.8458
H94.09852.78022.11901.08322.67294.63464.86233.06861.84333.75232.46242.4624
H104.52623.46532.10701.08254.05464.63995.51832.41551.84335.12443.98403.9840
H112.59622.14683.46434.04351.08933.67882.37354.30243.75235.12441.76841.7684
H123.20082.14932.84272.95501.09324.12493.48013.84582.46243.98401.76841.7574
H133.20082.14932.84272.95501.09324.12493.48013.84582.46243.98401.76841.7574

picture of 1,3-Butadiene, 2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 119.607 C1 C2 C5 121.674
C2 C1 H6 121.234 C2 C1 H7 121.721
C2 C3 C4 125.907 C2 C3 H8 115.308
C2 C5 H11 111.091 C2 C5 H12 111.053
C2 C5 H13 111.053 C3 C2 C5 118.719
C3 C4 H9 122.226 C3 C4 H10 121.097
C4 C3 H8 118.785 H6 C1 H7 117.044
H9 C4 H10 116.676 H11 C5 H12 108.250
H11 C5 H13 108.250 H12 C5 H13 106.987
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.293 0.000    
2 C 0.093 0.000    
3 C -0.068 0.000    
4 C -0.286 0.000    
5 C -0.271 0.000    
6 H 0.102 0.000    
7 H 0.104 0.000    
8 H 0.105 0.000    
9 H 0.110 0.000    
10 H 0.115 0.000    
11 H 0.091 0.000    
12 H 0.099 0.000    
13 H 0.099 0.000    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.278 0.002 0.000 0.278
CHELPG 0.000 0.000 0.000 0.000
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.447 0.089 0.000
y 0.089 -30.030 0.000
z 0.000 0.000 -34.814
Traceless
 xyz
x 2.975 0.089 0.000
y 0.089 2.101 0.000
z 0.000 0.000 -5.076
Polar
3z2-r2-10.152
x2-y20.583
xy0.089
xz0.000
yz0.000


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> 130.645
(<r2>)1/2 11.430