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

using model chemistry: B1B95/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-31G*
 hartrees
Energy at 0K-195.192507
Energy at 298.15K-195.199943
Nuclear repulsion energy160.864344
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 B1B95/6-31G*
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' 3282 3116 15.39      
2 A' 3273 3107 13.42      
3 A' 3201 3038 3.18      
4 A' 3189 3028 11.40      
5 A' 3184 3023 9.71      
6 A' 3172 3011 17.13      
7 A' 3071 2916 18.38      
8 A' 1752 1664 1.56      
9 A' 1707 1620 18.17      
10 A' 1519 1442 6.78      
11 A' 1479 1404 0.80      
12 A' 1455 1381 3.70      
13 A' 1426 1354 7.54      
14 A' 1354 1285 0.96      
15 A' 1329 1262 0.39      
16 A' 1093 1037 5.13      
17 A' 1008 957 0.06      
18 A' 972 922 0.49      
19 A' 811 770 0.16      
20 A' 529 502 0.23      
21 A' 415 394 1.53      
22 A' 248 236 0.89      
23 A" 3135 2976 17.32      
24 A" 1496 1420 8.65      
25 A" 1081 1026 0.27      
26 A" 1039 986 15.78      
27 A" 937 890 25.41      
28 A" 930 883 59.81      
29 A" 795 755 0.51      
30 A" 646 613 0.05      
31 A" 404 384 6.77      
32 A" 165 156 0.12      
33 A" 108 102 0.32      

Unscaled Zero Point Vibrational Energy (zpe) 25101.6 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 23829.0 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 B1B95/6-31G*
ABC
0.28687 0.14041 0.09594

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.581 1.731 0.000
C2 0.000 0.525 0.000
C3 -0.828 -0.681 0.000
C4 -0.370 -1.934 0.000
C5 1.491 0.364 0.000
H6 -1.661 1.840 0.000
H7 0.001 2.646 0.000
H8 -1.902 -0.511 0.000
H9 0.691 -2.162 0.000
H10 -1.046 -2.781 0.000
H11 1.995 1.332 0.000
H12 1.824 -0.196 0.880
H13 1.824 -0.196 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.33832.42443.67142.48231.08531.08462.60224.09534.53632.60613.20453.2045
C21.33831.46282.48731.49992.11792.12112.16612.77453.46822.15152.14962.1496
C32.42441.46281.33462.54352.65453.42881.08792.12132.11203.46652.83592.8359
C43.67142.48731.33462.95743.98874.59572.09181.08481.08394.03232.93452.9345
C52.48231.49992.54352.95743.48022.72573.50442.64974.04121.09101.09451.0945
H61.08532.11792.65453.98873.48021.84712.36284.64144.66193.69034.13034.1303
H71.08462.12113.42884.59572.72571.84713.68634.85745.52782.38783.48903.4890
H82.60222.16611.08792.09183.50442.36283.68633.07422.42694.31053.84183.8418
H94.09532.77452.12131.08482.64974.64144.85743.07421.84403.72912.43422.4342
H104.53633.46822.11201.08394.04124.66195.52782.42691.84405.11523.96223.9622
H112.60612.15153.46654.03231.09103.69032.38784.31053.72915.11521.77091.7709
H123.20452.14962.83592.93451.09454.13033.48903.84182.43423.96221.77091.7596
H133.20452.14962.83592.93451.09454.13033.48903.84182.43423.96221.77091.7596

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 119.813 C1 C2 C5 121.892
C2 C1 H6 121.474 C2 C1 H7 121.838
C2 C3 C4 125.466 C2 C3 H8 115.468
C2 C5 H11 111.304 C2 C5 H12 110.937
C2 C5 H13 110.937 C3 C2 C5 118.294
C3 C4 H9 122.174 C3 C4 H10 121.333
C4 C3 H8 119.066 H6 C1 H7 116.689
H9 C4 H10 116.493 H11 C5 H12 108.251
H11 C5 H13 108.251 H12 C5 H13 107.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.430      
2 C 0.187      
3 C -0.119      
4 C -0.386      
5 C -0.566      
6 H 0.158      
7 H 0.157      
8 H 0.150      
9 H 0.158      
10 H 0.163      
11 H 0.172      
12 H 0.178      
13 H 0.178      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.229 -0.021 0.000 0.230
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.999 0.078 0.000
y 0.078 -29.441 0.000
z 0.000 0.000 -34.172
Traceless
 xyz
x 2.807 0.078 0.000
y 0.078 2.144 0.000
z 0.000 0.000 -4.951
Polar
3z2-r2-9.903
x2-y20.442
xy0.078
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.757 -0.857 0.000
y -0.857 12.293 0.000
z 0.000 0.000 3.764


<r2> (average value of r2) Å2
<r2> 130.277
(<r2>)1/2 11.414