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

using model chemistry: MP2/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/LANL2DZ
 hartrees
Energy at 0K-194.307337
Energy at 298.15K-194.314365
HF Energy-193.875800
Nuclear repulsion energy154.128220
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/LANL2DZ
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 3136 3021 36.31      
2 A1 3126 3011 9.52      
3 A1 3008 2897 58.02      
4 A1 1998 1925 10.15      
5 A1 1547 1490 0.76      
6 A1 1516 1460 4.58      
7 A1 1461 1407 0.03      
8 A1 1321 1272 13.36      
9 A1 1038 999 6.90      
10 A1 711 684 0.00      
11 A1 344 331 0.21      
12 A2 3093 2979 0.00      
13 A2 1518 1462 0.00      
14 A2 1037 999 0.00      
15 A2 630 607 0.00      
16 A2 144 139 0.00      
17 B1 3220 3101 14.59      
18 B1 3095 2981 66.53      
19 B1 1530 1474 20.89      
20 B1 1137 1095 0.40      
21 B1 1060 1021 0.01      
22 B1 457 440 0.41      
23 B1 249 240 8.83      
24 B1 177 171 1.94      
25 B2 3133 3018 24.29      
26 B2 3007 2896 28.66      
27 B2 1531 1474 7.67      
28 B2 1447 1394 9.50      
29 B2 1222 1177 8.68      
30 B2 995 958 0.08      
31 B2 913 879 75.22      
32 B2 592 570 11.73      
33 B2 175 169 1.54      

Unscaled Zero Point Vibrational Energy (zpe) 24783.4 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 23868.9 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/LANL2DZ
ABC
0.26681 0.11491 0.08432

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 2.298
C2 0.000 0.000 0.954
H3 -0.934 0.000 2.870
H4 0.934 0.000 2.870
C5 0.000 0.000 -0.388
C6 0.000 1.309 -1.202
C7 0.000 -1.309 -1.202
H8 0.000 2.192 -0.541
H9 0.000 -2.192 -0.541
H10 0.894 1.354 -1.853
H11 -0.894 1.354 -1.853
H12 -0.894 -1.354 -1.853
H13 0.894 -1.354 -1.853

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 C7 H8 H9 H10 H11 H12 H13
C11.34321.09591.09592.68573.73683.73683.58643.58644.45674.45674.45674.4567
C21.34322.13172.13171.34252.52302.52302.65342.65343.24283.24283.24283.2428
H31.09592.13171.86873.38984.37894.37894.16124.16125.24314.91414.91415.2431
H41.09592.13171.86873.38984.37894.37894.16124.16124.91415.24315.24314.9141
C52.68571.34253.38983.38981.54171.54172.19712.19712.18622.18622.18622.1862
C63.73682.52304.37894.37891.54172.61811.10293.56271.10691.10692.88352.8835
C73.73682.52304.37894.37891.54172.61813.56271.10292.88352.88351.10691.1069
H83.58642.65344.16124.16122.19711.10293.56274.38361.79541.79543.88493.8849
H93.58642.65344.16124.16122.19713.56271.10294.38363.88493.88491.79541.7954
H104.45673.24285.24314.91412.18621.10692.88351.79543.88491.78843.24502.7077
H114.45673.24284.91415.24312.18621.10692.88351.79543.88491.78842.70773.2450
H124.45673.24284.91415.24312.18622.88351.10693.88491.79543.24502.70771.7884
H134.45673.24285.24314.91412.18622.88351.10693.88491.79542.70773.24501.7884

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 121.511
C2 C1 H4 121.511 C2 C5 C6 121.884
C2 C5 C7 121.884 H3 C1 H4 116.979
C5 C6 H8 111.280 C5 C6 H10 110.179
C5 C6 H11 110.179 C5 C7 H9 111.280
C5 C7 H12 110.179 C5 C7 H13 110.179
C6 C5 C7 116.233 H8 C6 H10 108.672
H8 C6 H11 108.672 H9 C7 H12 108.672
H9 C7 H13 108.672 H10 C6 H11 107.769
H12 C7 H13 107.769
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability