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

using model chemistry: MP2/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-194.869551
Energy at 298.15K-194.877233
HF Energy-194.029279
Nuclear repulsion energy160.844603
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/aug-cc-pVTZ
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' 3278 3124 7.23      
2 A' 3266 3112 7.79      
3 A' 3186 3036 2.96      
4 A' 3172 3023 9.53      
5 A' 3169 3019 5.85      
6 A' 3167 3018 11.14      
7 A' 3062 2917 15.88      
8 A' 1692 1612 2.23      
9 A' 1645 1567 19.57      
10 A' 1515 1444 7.08      
11 A' 1464 1395 1.32      
12 A' 1437 1370 2.90      
13 A' 1411 1344 6.50      
14 A' 1342 1278 0.51      
15 A' 1315 1253 0.22      
16 A' 1084 1033 2.72      
17 A' 1007 959 0.18      
18 A' 971 925 0.75      
19 A' 805 767 0.15      
20 A' 528 503 0.05      
21 A' 416 397 1.55      
22 A' 281 267 0.77      
23 A" 3135 2988 9.45      
24 A" 1497 1426 8.40      
25 A" 1071 1021 0.71      
26 A" 1018 970 18.41      
27 A" 925 881 34.15      
28 A" 914 871 37.21      
29 A" 786 749 0.65      
30 A" 643 613 0.22      
31 A" 401 382 10.13      
32 A" 219 209 0.34      
33 A" 161 154 0.24      

Unscaled Zero Point Vibrational Energy (zpe) 24990.8 cm-1
Scaled (by 0.9529) Zero Point Vibrational Energy (zpe) 23813.7 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/aug-cc-pVTZ
ABC
0.28678 0.14041 0.09593

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.578 1.738 0.000
C2 0.000 0.526 0.000
C3 -0.831 -0.678 0.000
C4 -0.366 -1.934 0.000
C5 1.490 0.354 0.000
H6 -1.656 1.846 0.000
H7 0.009 2.647 0.000
H8 -1.904 -0.507 0.000
H9 0.693 -2.156 0.000
H10 -1.042 -2.778 0.000
H11 1.988 1.322 0.000
H12 1.814 -0.204 0.880
H13 1.814 -0.204 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.34282.42923.67852.48841.08301.08232.60744.09634.53982.59953.20473.2047
C21.34281.46332.48761.49972.11762.12092.16632.77023.46472.14102.14442.1444
C32.42921.46331.33982.54032.65523.42951.08602.12362.11063.45642.82802.8280
C43.67852.48761.33982.94633.99444.59672.09811.08231.08134.01772.91902.9190
C52.48841.49972.54032.94633.48152.72943.50132.63334.02761.08831.09121.0912
H61.08302.11762.65523.99443.48151.84772.36634.64054.66463.68114.12544.1254
H71.08232.12093.42954.59672.72941.84773.68914.85145.52592.38143.48743.4874
H82.60742.16631.08602.09813.50132.36633.68913.07642.42884.30013.83283.8328
H94.09632.77022.12361.08232.63334.64054.85143.07641.84383.71072.41642.4164
H104.53983.46472.11061.08134.02764.66465.52592.42881.84385.09793.94433.9443
H112.59952.14103.45644.01771.08833.68112.38144.30013.71075.09791.76991.7699
H123.20472.14442.82802.91901.09124.12543.48743.83282.41643.94431.76991.7591
H133.20472.14442.82802.91901.09124.12543.48743.83282.41643.94431.76991.7591

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 119.863 C1 C2 C5 122.100
C2 C1 H6 121.236 C2 C1 H7 121.617
C2 C3 C4 125.045 C2 C3 H8 115.583
C2 C5 H11 110.639 C2 C5 H12 110.740
C2 C5 H13 110.740 C3 C2 C5 118.037
C3 C4 H9 122.141 C3 C4 H10 120.955
C4 C3 H8 119.372 H6 C1 H7 117.147
H9 C4 H10 116.904 H11 C5 H12 108.597
H11 C5 H13 108.597 H12 C5 H13 107.428
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability