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: HSEh1PBE/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 HSEh1PBE/6-31G*
 hartrees
Energy at 0K-195.059215
Energy at 298.15K-195.066337
Nuclear repulsion energy157.313573
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 HSEh1PBE/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 3174 3018 15.73      
2 A1 3158 3004 10.00      
3 A1 3056 2906 57.78      
4 A1 2103 2000 23.42      
5 A1 1544 1468 0.75      
6 A1 1496 1423 4.18      
7 A1 1437 1366 0.98      
8 A1 1340 1275 18.27      
9 A1 1041 990 8.32      
10 A1 755 718 0.04      
11 A1 339 323 0.19      
12 A2 3112 2959 0.00      
13 A2 1500 1426 0.00      
14 A2 1012 963 0.00      
15 A2 620 589 0.00      
16 A2 170 162 0.00      
17 B1 3230 3072 6.39      
18 B1 3113 2960 44.65      
19 B1 1517 1442 17.22      
20 B1 1110 1055 0.59      
21 B1 1035 984 0.12      
22 B1 468 445 0.43      
23 B1 270 257 4.44      
24 B1 184 175 1.35      
25 B2 3173 3017 16.12      
26 B2 3052 2902 17.59      
27 B2 1509 1435 6.85      
28 B2 1422 1352 4.48      
29 B2 1245 1184 4.28      
30 B2 980 932 0.41      
31 B2 876 833 54.64      
32 B2 613 583 7.89      
33 B2 185 176 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 24917.9 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 23696.9 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 HSEh1PBE/6-31G*
ABC
0.27688 0.12070 0.08834

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 2.238
C2 0.000 0.000 0.932
H3 -0.926 0.000 2.810
H4 0.926 0.000 2.810
C5 0.000 0.000 -0.379
C6 0.000 1.282 -1.170
C7 0.000 -1.282 -1.170
H8 0.000 2.160 -0.519
H9 0.000 -2.160 -0.519
H10 0.882 1.333 -1.822
H11 -0.882 1.333 -1.822
H12 -0.882 -1.333 -1.822
H13 0.882 -1.333 -1.822

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 C7 H8 H9 H10 H11 H12 H13
C11.30621.08891.08892.61653.64093.64093.50243.50244.36294.36294.36294.3629
C21.30622.09442.09441.31032.46172.46172.60192.60193.18373.18373.18373.1837
H31.08892.09441.85293.32054.28264.28264.07524.07525.14784.81984.81985.1478
H41.08892.09441.85293.32054.28264.28264.07524.07524.81985.14785.14784.8198
C52.61651.31033.32053.32051.50661.50662.16442.16442.15352.15352.15352.1535
C63.64092.46174.28264.28261.50662.56421.09253.50281.09791.09792.83602.8360
C73.64092.46174.28264.28261.50662.56423.50281.09252.83602.83601.09791.0979
H83.50242.60194.07524.07522.16441.09253.50284.31961.77691.77693.83083.8308
H93.50242.60194.07524.07522.16443.50281.09254.31963.83083.83081.77691.7769
H104.36293.18375.14784.81982.15351.09792.83601.77693.83081.76423.19722.6665
H114.36293.18374.81985.14782.15351.09792.83601.77693.83081.76422.66653.1972
H124.36293.18374.81985.14782.15352.83601.09793.83081.77693.19722.66651.7642
H134.36293.18375.14784.81982.15352.83601.09793.83081.77692.66653.19721.7642

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 121.698
C2 C1 H4 121.698 C2 C5 C6 121.678
C2 C5 C7 121.678 H3 C1 H4 116.605
C5 C6 H8 111.777 C5 C6 H10 110.572
C5 C6 H11 110.572 C5 C7 H9 111.777
C5 C7 H12 110.572 C5 C7 H13 110.572
C6 C5 C7 116.643 H8 C6 H10 108.424
H8 C6 H11 108.424 H9 C7 H12 108.424
H9 C7 H13 108.424 H10 C6 H11 106.911
H12 C7 H13 106.911
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.587      
2 C 0.267      
3 H 0.184      
4 H 0.184      
5 C -0.043      
6 C -0.551      
7 C -0.551      
8 H 0.191      
9 H 0.191      
10 H 0.179      
11 H 0.179      
12 H 0.179      
13 H 0.179      


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 -0.577 0.577
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.355 0.000 0.000
y 0.000 -31.694 0.000
z 0.000 0.000 -28.965
Traceless
 xyz
x -1.026 0.000 0.000
y 0.000 -1.534 0.000
z 0.000 0.000 2.560
Polar
3z2-r25.120
x2-y20.339
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.498 0.000 0.000
y 0.000 6.067 0.000
z 0.000 0.000 12.742


<r2> (average value of r2) Å2
<r2> 142.292
(<r2>)1/2 11.929