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: HF/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/6-31G**
 hartrees
Energy at 0K-193.970917
Energy at 298.15K-193.978898
Nuclear repulsion energy161.031508
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 HF/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 A' 3402 3071 22.48      
2 A' 3393 3062 18.29      
3 A' 3330 3005 7.86      
4 A' 3316 2993 19.82      
5 A' 3310 2988 3.19      
6 A' 3273 2954 25.14      
7 A' 3183 2873 26.53      
8 A' 1888 1704 1.00      
9 A' 1825 1647 25.72      
10 A' 1633 1474 5.44      
11 A' 1591 1436 0.73      
12 A' 1564 1411 3.07      
13 A' 1542 1392 2.81      
14 A' 1441 1301 0.91      
15 A' 1437 1297 0.95      
16 A' 1184 1069 4.99      
17 A' 1097 990 0.07      
18 A' 1038 937 0.26      
19 A' 836 754 0.30      
20 A' 570 514 0.06      
21 A' 459 414 1.95      
22 A' 300 271 1.20      
23 A" 3238 2923 32.25      
24 A" 1610 1453 5.80      
25 A" 1168 1055 0.08      
26 A" 1138 1027 13.86      
27 A" 1068 964 50.48      
28 A" 1054 952 47.99      
29 A" 859 775 0.60      
30 A" 704 636 0.12      
31 A" 437 394 7.64      
32 A" 229 206 0.23      
33 A" 152 137 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26632.0 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 24038.0 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 HF/6-31G**
ABC
0.28631 0.13995 0.09565

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.591 1.716 0.000
C2 0.000 0.530 0.000
C3 -0.824 -0.697 0.000
C4 -0.372 -1.940 0.000
C5 1.501 0.390 0.000
H6 -1.663 1.812 0.000
H7 -0.025 2.631 0.000
H8 -1.890 -0.534 0.000
H9 0.677 -2.177 0.000
H10 -1.051 -2.774 0.000
H11 1.980 1.361 0.000
H12 1.841 -0.157 0.875
H13 1.841 -0.157 -0.875

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.32542.42413.66232.47701.07631.07562.59824.09424.51332.59513.19133.1913
C21.32541.47722.49701.50772.09992.10192.16832.78983.46632.14752.15062.1506
C32.42411.47721.32242.56612.64553.42241.07832.10772.08933.47782.85592.8559
C43.66232.49701.32242.98903.96764.58402.06851.07531.07534.05292.97342.9734
C52.47701.50772.56612.98903.46892.71223.51432.69574.06431.08301.08631.0863
H61.07632.09992.64553.96763.46891.83072.35724.62454.62653.67064.11284.1128
H71.07562.10193.42244.58402.71221.83073.67354.85925.50142.37403.46723.4672
H82.59822.16831.07832.06853.51432.35723.67353.04722.39164.30873.85013.8501
H94.09422.78982.10771.07532.69574.62454.85923.04721.82773.77032.49042.4904
H104.51333.46632.08931.07534.06434.62655.50142.39161.82775.12653.99693.9969
H112.59512.14753.47784.05291.08303.67062.37404.30873.77035.12651.75751.7575
H123.19132.15062.85592.97341.08634.11283.46723.85012.49043.99691.75751.7509
H133.19132.15062.85592.97341.08634.11283.46723.85012.49043.99691.75751.7509

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 119.651 C1 C2 C5 121.789
C2 C1 H6 121.584 C2 C1 H7 121.839
C2 C3 C4 126.144 C2 C3 H8 115.207
C2 C5 H11 110.918 C2 C5 H12 110.963
C2 C5 H13 110.963 C3 C2 C5 118.560
C3 C4 H9 122.720 C3 C4 H10 120.892
C4 C3 H8 118.649 H6 C1 H7 116.576
H9 C4 H10 116.387 H11 C5 H12 108.231
H11 C5 H13 108.231 H12 C5 H13 107.400
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.320 -0.568    
2 C 0.058 0.259    
3 C -0.094 -0.113    
4 C -0.306 -0.374    
5 C -0.359 -0.148    
6 H 0.124 0.187    
7 H 0.125 0.197    
8 H 0.134 0.110    
9 H 0.128 0.165    
10 H 0.131 0.147    
11 H 0.123 0.048    
12 H 0.128 0.045    
13 H 0.128 0.045    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.203 -0.047 0.000 0.208
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.516 0.002 0.000
y 0.002 -29.923 0.000
z 0.000 0.000 -34.954
Traceless
 xyz
x 2.923 0.002 0.000
y 0.002 2.312 0.000
z 0.000 0.000 -5.235
Polar
3z2-r2-10.470
x2-y20.407
xy0.002
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.516 -1.288 0.000
y -1.288 12.301 0.000
z 0.000 0.000 3.782


<r2> (average value of r2) Å2
<r2> 130.869
(<r2>)1/2 11.440