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: CID/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 CID/6-31G*
 hartrees
Energy at 0K-194.510877
Energy at 298.15K-194.518159
HF Energy-193.937451
Nuclear repulsion energy157.712181
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 CID/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 3259 3011 14.01      
2 A1 3257 3008 12.50      
3 A1 3150 2910 51.36      
4 A1 2181 2014 20.88      
5 A1 1609 1486 0.18      
6 A1 1567 1447 2.99      
7 A1 1514 1398 1.16      
8 A1 1397 1290 16.27      
9 A1 1086 1004 6.80      
10 A1 775 716 0.01      
11 A1 355 328 0.11      
12 A2 3208 2963 0.00      
13 A2 1569 1449 0.00      
14 A2 1061 980 0.00      
15 A2 649 599 0.00      
16 A2 170 157 0.00      
17 B1 3336 3082 6.72      
18 B1 3210 2965 49.10      
19 B1 1584 1463 15.13      
20 B1 1169 1080 0.01      
21 B1 1090 1007 0.54      
22 B1 480 443 0.36      
23 B1 279 258 4.74      
24 B1 180 166 0.89      
25 B2 3256 3007 17.17      
26 B2 3146 2906 17.34      
27 B2 1581 1461 5.63      
28 B2 1499 1385 4.27      
29 B2 1299 1200 3.79      
30 B2 1028 949 0.48      
31 B2 946 874 53.24      
32 B2 635 587 9.56      
33 B2 194 180 0.20      

Unscaled Zero Point Vibrational Energy (zpe) 25859.2 cm-1
Scaled (by 0.9237) Zero Point Vibrational Energy (zpe) 23886.1 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 CID/6-31G*
ABC
0.27706 0.12143 0.08871

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 2.232
C2 0.000 0.000 0.929
H3 -0.922 0.000 2.798
H4 0.922 0.000 2.798
C5 0.000 0.000 -0.376
C6 0.000 1.283 -1.168
C7 0.000 -1.283 -1.168
H8 0.000 2.153 -0.516
H9 0.000 -2.153 -0.516
H10 0.879 1.333 -1.813
H11 -0.879 1.333 -1.813
H12 -0.879 -1.333 -1.813
H13 0.879 -1.333 -1.813

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 C7 H8 H9 H10 H11 H12 H13
C11.30311.08161.08162.60803.63363.63363.49133.49134.34834.34834.34834.3483
C21.30312.08412.08411.30482.45792.45792.59332.59333.17243.17243.17243.1724
H31.08162.08411.84343.30514.26874.26874.05844.05845.12614.79964.79965.1261
H41.08162.08411.84343.30514.26874.26874.05844.05844.79965.12615.12614.7996
C52.60801.30483.30513.30511.50761.50762.15792.15792.14772.14772.14772.1477
C63.63362.45794.26874.26871.50762.56621.08703.49761.09131.09132.83402.8340
C73.63362.45794.26874.26871.50762.56623.49761.08702.83402.83401.09131.0913
H83.49132.59334.05844.05842.15791.08703.49764.30671.76821.76823.82183.8218
H93.49132.59334.05844.05842.15793.49761.08704.30673.82183.82181.76821.7682
H104.34833.17245.12614.79962.14771.09132.83401.76823.82181.75763.19292.6656
H114.34833.17244.79965.12612.14771.09132.83401.76823.82181.75762.66563.1929
H124.34833.17244.79965.12612.14772.83401.09133.82181.76823.19292.66561.7576
H134.34833.17245.12614.79962.14772.83401.09133.82181.76822.66563.19291.7576

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 121.555
C2 C1 H4 121.555 C2 C5 C6 121.670
C2 C5 C7 121.670 H3 C1 H4 116.889
C5 C6 H8 111.516 C5 C6 H10 110.433
C5 C6 H11 110.433 C5 C7 H9 111.516
C5 C7 H12 110.433 C5 C7 H13 110.433
C6 C5 C7 116.659 H8 C6 H10 108.529
H8 C6 H11 108.529 H9 C7 H12 108.529
H9 C7 H13 108.529 H10 C6 H11 107.273
H12 C7 H13 107.273
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability