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 (1,2-Butadiene, 3-methyl-)

using model chemistry: B97D3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B97D3/6-31G*
 hartrees
Energy at 0K-195.162726
Energy at 298.15K-195.169684
HF Energy-195.162726
Nuclear repulsion energy 
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 B97D3/6-31G*
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 3090 3030 21.40      
2 A1 3069 3009 20.08      
3 A1 2975 2917 75.95      
4 A1 2030 1990 17.98      
5 A1 1512 1482 0.40      
6 A1 1467 1439 2.28      
7 A1 1409 1381 3.51      
8 A1 1306 1280 18.47      
9 A1 1019 999 7.30      
10 A1 726 712 0.01      
11 A1 337 330 0.17      
12 A2 3024 2965 0.00      
13 A2 1475 1447 0.00      
14 A2 996 976 0.00      
15 A2 601 589 0.00      
16 A2 160 157 0.00      
17 B1 3133 3071 13.23      
18 B1 3026 2967 63.13      
19 B1 1492 1463 13.15      
20 B1 1086 1065 0.43      
21 B1 1014 994 0.19      
22 B1 445 436 0.45      
23 B1 259 254 3.72      
24 B1 175 171 1.32      
25 B2 3089 3029 24.50      
26 B2 2970 2911 24.03      
27 B2 1484 1455 5.75      
28 B2 1392 1364 1.04      
29 B2 1191 1168 5.37      
30 B2 958 939 0.07      
31 B2 825 809 49.85      
32 B2 594 582 6.61      
33 B2 176 173 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 24249.9 cm-1
Scaled (by 0.9804) Zero Point Vibrational Energy (zpe) 23774.6 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 B97D3/6-31G*
ABC
0.27376 0.11916 0.08724

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 2.252
C2 0.000 0.000 0.938
H3 -0.930 0.000 2.829
H4 0.930 0.000 2.829
C5 0.000 0.000 -0.380
C6 0.000 1.290 -1.178
C7 0.000 -1.290 -1.178
H8 0.000 2.171 -0.525
H9 0.000 -2.171 -0.525
H10 0.886 1.339 -1.833
H11 -0.886 1.339 -1.833
H12 -0.886 -1.339 -1.833
H13 0.886 -1.339 -1.833

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 C7 H8 H9 H10 H11 H12 H13
C11.31411.09411.09412.63153.66463.66463.52503.52504.38864.38864.38864.3886
C21.31412.10712.10711.31742.47822.47822.61812.61813.20193.20193.20193.2019
H31.09412.10711.85953.34034.31094.31094.10204.10205.17854.84994.84995.1785
H41.09412.10711.85953.34034.31094.31094.10204.10204.84995.17855.17854.8499
C52.63151.31743.34033.34031.51721.51722.17632.17632.16532.16532.16532.1653
C63.66462.47824.31094.31091.51722.58011.09703.52251.10271.10272.85032.8503
C73.66462.47824.31094.31091.51722.58013.52251.09702.85032.85031.10271.1027
H83.52502.61814.10204.10202.17631.09703.52254.34281.78561.78563.84923.8492
H93.52502.61814.10204.10202.17633.52251.09704.34283.84923.84921.78561.7856
H104.38863.20195.17854.84992.16531.10272.85031.78563.84921.77243.21102.6775
H114.38863.20194.84995.17852.16531.10272.85031.78563.84921.77242.67753.2110
H124.38863.20194.84995.17852.16532.85031.10273.84921.78563.21102.67751.7724
H134.38863.20195.17854.84992.16532.85031.10273.84921.78562.67753.21101.7724

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 121.770
C2 C1 H4 121.770 C2 C5 C6 121.802
C2 C5 C7 121.802 H3 C1 H4 116.461
C5 C6 H8 111.612 C5 C6 H10 110.508
C5 C6 H11 110.508 C5 C7 H9 111.612
C5 C7 H12 110.508 C5 C7 H13 110.508
C6 C5 C7 116.396 H8 C6 H10 108.515
H8 C6 H11 108.515 H9 C7 H12 108.515
H9 C7 H13 108.515 H10 C6 H11 107.038
H12 C7 H13 107.038
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.558      
2 C 0.286      
3 H 0.162      
4 H 0.162      
5 C -0.028      
6 C -0.496      
7 C -0.496      
8 H 0.168      
9 H 0.168      
10 H 0.158      
11 H 0.158      
12 H 0.158      
13 H 0.158      


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 -0.603 0.603
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.305 0.000 0.000
y 0.000 -31.678 0.000
z 0.000 0.000 -29.204
Traceless
 xyz
x -0.864 0.000 0.000
y 0.000 -1.424 0.000
z 0.000 0.000 2.288
Polar
3z2-r24.576
x2-y20.373
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.600 0.000 0.000
y 0.000 6.278 0.000
z 0.000 0.000 13.073


<r2> (average value of r2) Å2
<r2> 143.844
(<r2>)1/2 11.993