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

using model chemistry: BLYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at BLYP/3-21G*
 hartrees
Energy at 0K-194.128350
Energy at 298.15K-194.135866
Nuclear repulsion energy158.843551
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 BLYP/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' 3162 3142 19.91      
2 A' 3155 3134 13.90      
3 A' 3087 3067 4.12      
4 A' 3076 3056 9.78      
5 A' 3064 3044 9.83      
6 A' 3051 3031 16.94      
7 A' 2969 2949 15.79      
8 A' 1637 1627 1.60      
9 A' 1617 1606 14.46      
10 A' 1527 1517 7.91      
11 A' 1472 1463 1.16      
12 A' 1438 1429 2.90      
13 A' 1418 1409 4.67      
14 A' 1335 1326 0.13      
15 A' 1292 1284 2.49      
16 A' 1094 1087 5.36      
17 A' 1025 1018 0.45      
18 A' 935 929 0.77      
19 A' 753 748 0.17      
20 A' 534 531 0.36      
21 A' 425 422 0.83      
22 A' 273 271 0.60      
23 A" 3012 2992 20.53      
24 A" 1516 1506 7.35      
25 A" 1078 1071 1.95      
26 A" 1001 994 17.92      
27 A" 902 896 41.12      
28 A" 891 885 55.08      
29 A" 765 760 0.51      
30 A" 623 619 0.03      
31 A" 385 383 8.82      
32 A" 187 186 0.50      
33 A" 154 153 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 24426.7 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 24268.0 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 BLYP/3-21G*
ABC
0.27912 0.13660 0.09334

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.577 1.756 0.000
C2 0.000 0.530 0.000
C3 -0.842 -0.687 0.000
C4 -0.392 -1.959 0.000
C5 1.520 0.363 0.000
H6 -1.663 1.875 0.000
H7 0.018 2.672 0.000
H8 -1.923 -0.504 0.000
H9 0.673 -2.201 0.000
H10 -1.080 -2.807 0.000
H11 2.019 1.344 0.000
H12 1.850 -0.199 0.892
H13 1.850 -0.199 -0.892

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.35492.45743.72012.51751.09311.09202.63084.14954.59042.62793.24113.2411
C21.35491.48012.52011.52942.13912.14212.18352.81263.50722.17682.17912.1791
C32.45741.48011.35002.58552.69033.46741.09602.14222.13303.50892.87792.8779
C43.72012.52011.35003.00824.03994.64962.11271.09191.09174.08962.98672.9867
C52.51751.52942.58553.00823.52442.75493.55092.70014.09991.10061.10431.1043
H61.09312.13912.69034.03993.52441.86042.39344.69814.71793.72014.17604.1760
H71.09202.14213.46744.64962.75491.86043.72224.91675.58772.40153.52043.5204
H82.63082.18351.09602.11273.55092.39343.72223.10162.45204.35373.88903.8890
H94.14952.81262.14221.09192.70014.69814.91673.10161.85523.79182.48762.4876
H104.59043.50722.13301.09174.09994.71795.58772.45201.85525.18014.02274.0227
H112.62792.17683.50894.08961.10063.72012.40154.35373.79185.18011.79011.7901
H123.24112.17912.87792.98671.10434.17603.52043.88902.48764.02271.79011.7836
H133.24112.17912.87792.98671.10434.17603.52043.88902.48764.02271.79011.7836

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 120.115 C1 C2 C5 121.460
C2 C1 H6 121.445 C2 C1 H7 121.829
C2 C3 C4 125.798 C2 C3 H8 115.091
C2 C5 H11 110.662 C2 C5 H12 110.625
C2 C5 H13 110.625 C3 C2 C5 118.425
C3 C4 H9 122.277 C3 C4 H10 121.388
C4 C3 H8 119.110 H6 C1 H7 116.726
H9 C4 H10 116.335 H11 C5 H12 108.560
H11 C5 H13 108.560 H12 C5 H13 107.718
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.348      
2 C 0.029      
3 C -0.158      
4 C -0.352      
5 C -0.577      
6 H 0.166      
7 H 0.166      
8 H 0.163      
9 H 0.169      
10 H 0.171      
11 H 0.184      
12 H 0.194      
13 H 0.194      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.263 -0.016 0.000 0.264
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.252 0.018 0.000
y 0.018 -29.697 0.000
z 0.000 0.000 -34.905
Traceless
 xyz
x 3.049 0.018 0.000
y 0.018 2.382 0.000
z 0.000 0.000 -5.431
Polar
3z2-r2-10.861
x2-y20.444
xy0.018
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> 133.540
(<r2>)1/2 11.556