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All results from a given calculation for C5H8 (1,2-Butadiene, 3-methyl-)

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-195.218539
Energy at 298.15K-195.225630
Nuclear repulsion energy157.089418
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 B3PW91/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3159 3022 16.53      
2 A1 3143 3007 11.45      
3 A1 3043 2912 60.15      
4 A1 2088 1997 23.01      
5 A1 1539 1472 0.53      
6 A1 1493 1429 4.04      
7 A1 1434 1372 1.33      
8 A1 1334 1276 18.66      
9 A1 1037 992 8.15      
10 A1 748 716 0.04      
11 A1 338 324 0.21      
12 A2 3097 2963 0.00      
13 A2 1498 1433 0.00      
14 A2 1010 966 0.00      
15 A2 616 589 0.00      
16 A2 165 158 0.00      
17 B1 3213 3074 7.35      
18 B1 3098 2964 47.77      
19 B1 1515 1449 16.57      
20 B1 1107 1059 0.62      
21 B1 1034 989 0.13      
22 B1 466 446 0.47      
23 B1 269 257 4.52      
24 B1 180 173 1.24      
25 B2 3158 3021 17.49      
26 B2 3039 2907 18.65      
27 B2 1507 1442 6.66      
28 B2 1419 1357 3.64      
29 B2 1232 1179 4.73      
30 B2 976 934 0.35      
31 B2 869 831 54.57      
32 B2 610 584 7.72      
33 B2 185 177 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 24809.2 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 23735.0 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 B3PW91/6-31G*
ABC
0.27553 0.12044 0.08807

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 2.240
C2 0.000 0.000 0.932
H3 -0.927 0.000 2.813
H4 0.927 0.000 2.813
C5 0.000 0.000 -0.379
C6 0.000 1.286 -1.171
C7 0.000 -1.286 -1.171
H8 0.000 2.163 -0.520
H9 0.000 -2.163 -0.520
H10 0.883 1.338 -1.823
H11 -0.883 1.338 -1.823
H12 -0.883 -1.338 -1.823
H13 0.883 -1.338 -1.823

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 C7 H8 H9 H10 H11 H12 H13
C11.30771.08951.08952.61943.64563.64563.50653.50654.36794.36794.36794.3679
C21.30772.09662.09661.31172.46542.46542.60532.60533.18783.18783.18783.1878
H31.08952.09661.85343.32414.28804.28804.07984.07985.15344.82564.82565.1534
H41.08952.09661.85343.32414.28804.28804.07984.07984.82565.15345.15344.8256
C52.61941.31173.32413.32411.50991.50992.16762.16762.15732.15732.15732.1573
C63.64562.46544.28804.28801.50992.57101.09303.50951.09841.09842.84382.8438
C73.64562.46544.28804.28801.50992.57103.50951.09302.84382.84381.09841.0984
H83.50652.60534.07984.07982.16761.09303.50954.32601.77711.77713.83873.8387
H93.50652.60534.07984.07982.16763.50951.09304.32603.83873.83871.77711.7771
H104.36793.18785.15344.82562.15731.09842.84381.77713.83871.76523.20602.6763
H114.36793.18784.82565.15342.15731.09842.84381.77713.83871.76522.67633.2060
H124.36793.18784.82565.15342.15732.84381.09843.83871.77713.20602.67631.7652
H134.36793.18785.15344.82562.15732.84381.09843.83871.77712.67633.20601.7652

picture of 1,2-Butadiene, 3-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 180.000 C2 C1 H3 121.728
C2 C1 H4 121.728 C2 C5 C6 121.639
C2 C5 C7 121.639 H3 C1 H4 116.544
C5 C6 H8 111.764 C5 C6 H10 110.611
C5 C6 H11 110.611 C5 C7 H9 111.764
C5 C7 H12 110.611 C5 C7 H13 110.611
C6 C5 C7 116.722 H8 C6 H10 108.378
H8 C6 H11 108.378 H9 C7 H12 108.378
H9 C7 H13 108.378 H10 C6 H11 106.936
H12 C7 H13 106.936
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.593     -0.476
2 C 0.282     0.005
3 H 0.182     0.189
4 H 0.182     0.189
5 C -0.042     0.245
6 C -0.548     -0.549
7 C -0.548     -0.549
8 H 0.189     0.156
9 H 0.189     0.156
10 H 0.177     0.159
11 H 0.177     0.158
12 H 0.177     0.158
13 H 0.177     0.159


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 -0.588 0.588
CHELPG        
AIM        
ESP 0.008 0.000 -0.602 0.602


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.278 0.000 0.000
y 0.000 -31.600 0.000
z 0.000 0.000 -28.919
Traceless
 xyz
x -1.019 0.000 0.000
y 0.000 -1.502 0.000
z 0.000 0.000 2.520
Polar
3z2-r25.041
x2-y20.322
xy0.000
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> 142.609
(<r2>)1/2 11.942