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

using model chemistry: MP2/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/SDD
 hartrees
Energy at 0K-194.331249
Energy at 298.15K-194.338731
HF Energy-193.898916
Nuclear repulsion energy157.411197
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 MP2/SDD
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' 3255 3142 31.64      
2 A' 3243 3131 22.48      
3 A' 3154 3045 8.42      
4 A' 3136 3027 19.29      
5 A' 3134 3025 11.09      
6 A' 3128 3019 30.21      
7 A' 3016 2911 26.40      
8 A' 1671 1613 1.66      
9 A' 1624 1568 18.28      
10 A' 1549 1495 9.15      
11 A' 1500 1448 1.53      
12 A' 1462 1411 10.81      
13 A' 1452 1402 1.81      
14 A' 1348 1302 0.59      
15 A' 1330 1284 2.24      
16 A' 1105 1066 6.34      
17 A' 1031 996 1.07      
18 A' 971 937 0.58      
19 A' 773 746 0.29      
20 A' 532 513 0.31      
21 A' 423 408 0.69      
22 A' 279 269 0.52      
23 A" 3103 2995 29.31      
24 A" 1524 1471 10.40      
25 A" 1099 1061 0.31      
26 A" 981 947 44.63      
27 A" 874 844 68.09      
28 A" 829 800 45.85      
29 A" 755 729 0.02      
30 A" 615 594 0.37      
31 A" 389 375 12.48      
32 A" 198 191 0.63      
33 A" 132 127 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24806.8 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 23946.0 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 MP2/SDD
ABC
0.27530 0.13343 0.09144

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/SDD

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.596 1.774 0.000
C2 0.000 0.535 0.000
C3 -0.846 -0.700 0.000
C4 -0.376 -1.989 0.000
C5 1.527 0.381 0.000
H6 -1.686 1.883 0.000
H7 -0.007 2.695 0.000
H8 -1.933 -0.535 0.000
H9 0.692 -2.222 0.000
H10 -1.064 -2.839 0.000
H11 2.016 1.370 0.000
H12 1.866 -0.176 0.893
H13 1.866 -0.176 -0.893

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.37432.48603.76912.53891.09531.09392.66774.19844.63662.64273.26523.2652
C21.37431.49722.55231.53452.15842.15982.20932.84313.53852.18152.18792.1879
C32.48601.49721.37222.60722.71603.49721.09902.16442.15063.53172.90342.9034
C43.76912.55231.37223.03924.08764.69882.12991.09381.09374.12353.01913.0191
C52.53891.53452.60723.03923.54652.77633.57852.73334.13281.10341.10571.1057
H61.09532.15842.71604.08763.54651.86522.43074.74444.76323.73694.20184.2018
H71.09392.15983.49724.69882.77631.86523.76084.96685.63462.41793.54243.5424
H82.66772.20931.09902.12993.57852.43073.76083.12052.46264.38383.91923.9192
H94.19842.84312.16441.09382.73334.74444.96683.12051.86173.82802.52272.5227
H104.63663.53852.15061.09374.13284.76325.63462.46261.86175.21554.05954.0595
H112.64272.18153.53174.12351.10343.73692.41794.38383.82805.21551.79131.7913
H123.26522.18792.90343.01911.10574.20183.54243.91922.52274.05951.79131.7861
H133.26522.18792.90343.01911.10574.20183.54243.91922.52274.05951.79131.7861

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 119.883 C1 C2 C5 121.489
C2 C1 H6 121.442 C2 C1 H7 121.696
C2 C3 C4 125.564 C2 C3 H8 115.790
C2 C5 H11 110.519 C2 C5 H12 110.881
C2 C5 H13 110.881 C3 C2 C5 118.628
C3 C4 H9 122.333 C3 C4 H10 121.010
C4 C3 H8 118.646 H6 C1 H7 116.862
H9 C4 H10 116.657 H11 C5 H12 108.361
H11 C5 H13 108.361 H12 C5 H13 107.734
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability