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

using model chemistry: QCISD/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-311G**
 hartrees
Energy at 0K-194.777374
Energy at 298.15K-194.784973
Nuclear repulsion energy159.775624
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 QCISD/6-311G**
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' 3254 3105 16.44      
2 A' 3245 3096 14.46      
3 A' 3175 3029 5.67      
4 A' 3162 3017 14.17      
5 A' 3158 3013 3.61      
6 A' 3142 2998 20.18      
7 A' 3050 2910 19.93      
8 A' 1728 1649 1.21      
9 A' 1671 1594 16.77      
10 A' 1525 1455 6.15      
11 A' 1479 1411 0.60      
12 A' 1453 1387 3.36      
13 A' 1431 1365 4.05      
14 A' 1347 1285 0.77      
15 A' 1329 1268 0.24      
16 A' 1097 1046 3.02      
17 A' 1018 972 0.15      
18 A' 975 930 0.41      
19 A' 798 761 0.13      
20 A' 532 508 0.06      
21 A' 421 402 1.42      
22 A' 282 269 0.69      
23 A" 3112 2969 21.14      
24 A" 1505 1436 6.88      
25 A" 1079 1030 0.62      
26 A" 1009 963 20.04      
27 A" 906 864 39.62      
28 A" 893 852 33.15      
29 A" 768 733 0.70      
30 A" 633 604 0.26      
31 A" 387 369 8.52      
32 A" 208 198 0.31      
33 A" 139 132 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 24954.4 cm-1
Scaled (by 0.9541) Zero Point Vibrational Energy (zpe) 23809.0 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 QCISD/6-311G**
ABC
0.28304 0.13812 0.09447

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.588 1.741 0.000
C2 0.000 0.529 0.000
C3 -0.834 -0.691 0.000
C4 -0.370 -1.952 0.000
C5 1.504 0.375 0.000
H6 -1.671 1.842 0.000
H7 -0.004 2.658 0.000
H8 -1.912 -0.525 0.000
H9 0.693 -2.179 0.000
H10 -1.051 -2.799 0.000
H11 1.994 1.354 0.000
H12 1.838 -0.181 0.885
H13 1.838 -0.181 -0.885

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.34672.44423.69962.49821.08771.08712.62434.12364.56292.61023.21883.2188
C21.34671.47812.50891.51202.12522.12852.18332.79533.48972.15742.16012.1601
C32.44421.47811.34442.57022.66803.45001.09032.13262.11873.48982.86132.8613
C43.69962.50891.34442.98814.01184.62452.10161.08681.08654.06402.96592.9659
C52.49821.51202.57022.98813.49762.73553.53282.67964.07461.09411.09711.0971
H61.08772.12522.66804.01183.49761.85572.37974.66484.68233.69684.14614.1461
H71.08712.12853.45004.62452.73551.85573.71084.88635.55582.38513.49743.4974
H82.62432.18331.09032.10163.53282.37973.71083.08602.43124.33403.86863.8686
H94.12362.79532.13261.08682.67964.66484.88633.08601.85133.76422.46702.4670
H104.56293.48972.11871.08654.07464.68235.55582.43121.85135.14903.99813.9981
H112.61022.15743.48984.06401.09413.69682.38514.33403.76425.14901.77811.7781
H123.21882.16012.86132.96591.09714.14613.49743.86862.46703.99811.77811.7696
H133.21882.16012.86132.96591.09714.14613.49743.86862.46703.99811.77811.7696

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 119.749 C1 C2 C5 121.723
C2 C1 H6 121.252 C2 C1 H7 121.617
C2 C3 C4 125.402 C2 C3 H8 115.611
C2 C5 H11 110.729 C2 C5 H12 110.768
C2 C5 H13 110.768 C3 C2 C5 118.527
C3 C4 H9 122.249 C3 C4 H10 120.923
C4 C3 H8 118.987 H6 C1 H7 117.131
H9 C4 H10 116.828 H11 C5 H12 108.479
H11 C5 H13 108.479 H12 C5 H13 107.514
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability