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

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at G4
 hartrees
Energy at 0K-195.157844
Energy at 298.15K-195.150997
HF Energy-195.327487
Nuclear repulsion energy160.428337
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 B3LYP/6-31G(2df,p)
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' 3237 3124 13.89      
2 A' 3230 3117 11.29      
3 A' 3159 3048 2.63      
4 A' 3148 3038 9.63      
5 A' 3140 3030 9.41      
6 A' 3122 3013 17.16      
7 A' 3029 2923 18.37      
8 A' 1708 1648 1.68      
9 A' 1669 1610 18.65      
10 A' 1503 1451 5.23      
11 A' 1462 1411 1.51      
12 A' 1435 1385 2.66      
13 A' 1411 1361 3.68      
14 A' 1330 1284 0.71      
15 A' 1328 1282 0.97      
16 A' 1091 1053 3.66      
17 A' 1012 976 0.16      
18 A' 965 932 0.89      
19 A' 794 766 0.09      
20 A' 533 514 0.07      
21 A' 425 411 1.84      
22 A' 277 267 0.99      
23 A" 3081 2973 17.20      
24 A" 1481 1429 5.90      
25 A" 1074 1036 0.05      
26 A" 1041 1005 11.49      
27 A" 937 904 14.30      
28 A" 930 897 51.01      
29 A" 796 768 0.36      
30 A" 649 627 0.02      
31 A" 413 398 5.09      
32 A" 207 200 0.33      
33 A" 164 158 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 24889.5 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 24018.3 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 B3LYP/6-31G(2df,p)
ABC
0.28514 0.13925 0.09521

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.585 1.731 0.000
C2 0.000 0.525 0.000
C3 -0.825 -0.686 0.000
C4 -0.378 -1.945 0.000
C5 1.500 0.376 0.000
H6 -1.666 1.835 0.000
H7 -0.007 2.648 0.000
H8 -1.899 -0.510 0.000
H9 0.680 -2.186 0.000
H10 -1.062 -2.786 0.000
H11 1.994 1.351 0.000
H12 1.842 -0.180 0.880
H13 1.842 -0.180 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.34002.42813.68112.48651.08541.08472.59784.11534.54112.60653.21243.2124
C21.34001.46492.49851.50752.11922.12332.16322.79463.47682.15772.16032.1603
C32.42811.46491.33592.55582.65763.43291.08882.12442.11323.47692.85362.8536
C43.68112.49851.33592.98543.99344.60802.09091.08461.08424.05992.96922.9692
C52.48651.50752.55582.98543.48582.72663.51312.68994.06971.09231.09621.0962
H61.08542.11922.65763.99343.48581.84702.35744.65494.66013.69104.14054.1405
H71.08472.12333.43294.60802.72661.84703.68224.88255.53542.38463.49253.4925
H82.59782.16321.08882.09093.51312.35743.68223.07532.42414.31483.85793.8579
H94.11532.79462.12441.08462.68994.65494.88253.07531.84253.77242.47922.4792
H104.54113.47682.11321.08424.06974.66015.53542.42411.84255.14263.99983.9998
H112.60652.15773.47694.05991.09233.69102.38464.31483.77245.14261.77261.7726
H123.21242.16032.85362.96921.09624.14053.49253.85792.47923.99981.77261.7603
H133.21242.16032.85362.96921.09624.14053.49253.85792.47923.99981.77261.7603

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 119.889 C1 C2 C5 121.900
C2 C1 H6 121.578 C2 C1 H7 121.977
C2 C3 C4 126.107 C2 C3 H8 114.774
C2 C5 H11 111.005 C2 C5 H12 111.086
C2 C5 H13 111.086 C3 C2 C5 118.211
C3 C4 H9 122.540 C3 C4 H10 121.270
C4 C3 H8 119.119 H6 C1 H7 116.445
H9 C4 H10 116.190 H11 C5 H12 108.253
H11 C5 H13 108.253 H12 C5 H13 107.004
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.408      
2 C 0.384      
3 C -0.037      
4 C -0.344      
5 C -0.491      
6 H 0.106      
7 H 0.107      
8 H 0.085      
9 H 0.107      
10 H 0.113      
11 H 0.119      
12 H 0.130      
13 H 0.130      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.237 -0.009 0.000 0.237
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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> 131.279
(<r2>)1/2 11.458