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

using model chemistry: MP2/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-311G**
 hartrees
Energy at 0K-194.722630
Energy at 298.15K-194.730206
HF Energy-194.004792
Nuclear repulsion energy160.162849
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 MP2/6-311G**
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' 3284 3121 11.65      
2 A' 3273 3110 11.25      
3 A' 3192 3033 3.87      
4 A' 3178 3020 12.99      
5 A' 3175 3017 16.74      
6 A' 3174 3016 2.18      
7 A' 3070 2917 17.16      
8 A' 1701 1617 1.80      
9 A' 1650 1568 12.55      
10 A' 1520 1445 6.99      
11 A' 1470 1397 0.88      
12 A' 1444 1372 3.94      
13 A' 1419 1349 6.79      
14 A' 1343 1276 0.59      
15 A' 1319 1253 0.14      
16 A' 1090 1035 3.16      
17 A' 1012 961 0.24      
18 A' 974 926 0.48      
19 A' 804 764 0.14      
20 A' 531 504 0.11      
21 A' 418 398 1.38      
22 A' 282 268 0.67      
23 A" 3146 2990 15.62      
24 A" 1498 1424 8.33      
25 A" 1074 1020 0.95      
26 A" 1004 954 22.04      
27 A" 885 841 40.75      
28 A" 870 827 33.95      
29 A" 766 728 0.84      
30 A" 627 596 0.34      
31 A" 380 361 8.62      
32 A" 209 199 0.46      
33 A" 143 136 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 24962.3 cm-1
Scaled (by 0.9502) Zero Point Vibrational Energy (zpe) 23719.2 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 MP2/6-311G**
ABC
0.28453 0.13901 0.09504

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.586 1.740 0.000
C2 0.000 0.525 0.000
C3 -0.833 -0.684 0.000
C4 -0.366 -1.947 0.000
C5 1.498 0.370 0.000
H6 -1.668 1.839 0.000
H7 0.002 2.652 0.000
H8 -1.910 -0.521 0.000
H9 0.696 -2.167 0.000
H10 -1.048 -2.791 0.000
H11 1.989 1.346 0.000
H12 1.830 -0.187 0.883
H13 1.830 -0.187 -0.883

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.34872.43663.69302.49411.08631.08572.62004.11154.55432.60453.21343.2134
C21.34871.46832.49861.50632.12322.12752.17772.78023.47762.15152.15272.1527
C32.43661.46831.34582.55842.65793.43961.08962.12972.11773.47602.84912.8491
C43.69302.49861.34582.97384.00324.61392.10141.08511.08494.04812.94972.9497
C52.49411.50632.55842.97383.49032.72933.52292.66034.05861.09231.09511.0951
H61.08632.12322.65794.00323.49031.85732.37244.65134.67163.68954.13704.1370
H71.08572.12753.43964.61392.72931.85733.70504.86895.54382.37783.49003.4900
H82.62002.17771.08962.10143.52292.37243.70503.08252.42864.32273.85723.8572
H94.11152.78022.12971.08512.66034.65134.86893.08251.85213.74282.44652.4465
H104.55433.47762.11771.08494.05864.67165.54382.42861.85215.13153.98023.9802
H112.60452.15153.47604.04811.09233.68952.37784.32273.74285.13151.77581.7758
H123.21342.15272.84912.94971.09514.13703.49003.85722.44653.98021.77581.7661
H133.21342.15272.84912.94971.09514.13703.49003.85722.44653.98021.77581.7661

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 119.696 C1 C2 C5 121.658
C2 C1 H6 120.994 C2 C1 H7 121.464
C2 C3 C4 125.162 C2 C3 H8 115.932
C2 C5 H11 110.767 C2 C5 H12 110.695
C2 C5 H13 110.695 C3 C2 C5 118.646
C3 C4 H9 121.977 C3 C4 H10 120.829
C4 C3 H8 118.906 H6 C1 H7 117.542
H9 C4 H10 117.194 H11 C5 H12 108.547
H11 C5 H13 108.547 H12 C5 H13 107.487
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability