return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH2CHCHCH2 (1,3-Butadiene)

using model chemistry: MP2=FULL/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
1 2 no C2 1A

Conformer 1 (C2H)

Jump to S1C2
Energy calculated at MP2=FULL/6-31G**
 hartrees
Energy at 0K-155.491000
Energy at 298.15K-155.496350
HF Energy-154.929218
Nuclear repulsion energy103.790433
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=FULL/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3345 3126 0.00      
2 Ag 3246 3033 0.00      
3 Ag 3231 3019 0.00      
4 Ag 1751 1636 0.00      
5 Ag 1524 1424 0.00      
6 Ag 1345 1256 0.00      
7 Ag 1261 1179 0.00      
8 Ag 925 864 0.00      
9 Ag 520 486 0.00      
10 Au 1065 995 34.92      
11 Au 919 859 69.73      
12 Au 536 501 8.75      
13 Au 159 149 0.19      
14 Bg 1004 938 0.00      
15 Bg 920 859 0.00      
16 Bg 770 720 0.00      
17 Bu 3346 3126 23.94      
18 Bu 3246 3033 7.24      
19 Bu 3237 3025 21.18      
20 Bu 1685 1574 6.68      
21 Bu 1455 1360 2.45      
22 Bu 1348 1259 2.09      
23 Bu 1024 957 1.67      
24 Bu 297 277 2.05      

Unscaled Zero Point Vibrational Energy (zpe) 19078.6 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 17827.1 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=FULL/6-31G**
ABC
1.40704 0.14803 0.13394

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.728 0.000
C2 0.000 -0.728 0.000
C3 1.116 1.472 0.000
C4 -1.116 -1.472 0.000
H5 -0.969 1.216 0.000
H6 0.969 -1.216 0.000
H7 1.078 2.550 0.000
H8 2.095 1.013 0.000
H9 -1.078 -2.550 0.000
H10 -2.095 -1.013 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.45521.34172.46671.08462.17122.11752.11473.45062.7243
C21.45522.46671.34172.17121.08463.45062.72432.11752.1147
C31.34172.46673.69482.10062.69171.07911.08114.58184.0610
C42.46671.34173.69482.69172.10064.58184.06101.07911.0811
H51.08462.17122.10062.69173.10862.44313.07063.76762.4976
H62.17121.08462.69172.10063.10863.76762.49762.44313.0706
H72.11753.45061.07914.58182.44313.76761.84345.53754.7716
H82.11472.72431.08114.06103.07062.49761.84344.77164.6551
H93.45062.11754.58181.07913.76762.44315.53754.77161.8434
H102.72432.11474.06101.08112.49763.07064.77164.65511.8434

picture of 1,3-Butadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 123.697 C1 C2 H6 116.740
C1 C3 H7 121.644 C1 C3 H8 121.203
C2 C1 C3 123.697 C2 C1 H5 116.740
C2 C4 H9 121.644 C2 C4 H10 121.203
C3 C1 H5 119.563 C4 C2 H6 119.563
H7 C3 H8 117.153 H9 C4 H10 117.153
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2)

Jump to S1C1
Energy calculated at MP2=FULL/6-31G**
 hartrees
Energy at 0K-155.486782
Energy at 298.15K-155.492170
HF Energy-154.924314
Nuclear repulsion energy105.064793
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=FULL/6-31G**
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 3348 3129 4.87      
2 A 3253 3040 3.32      
3 A 3240 3028 18.80      
4 A 1717 1605 1.24      
5 A 1513 1414 6.15      
6 A 1366 1277 0.00      
7 A 1093 1021 0.05      
8 A 1025 958 3.20      
9 A 932 871 5.65      
10 A 916 856 0.68      
11 A 761 711 4.01      
12 A 276 258 0.00      
13 A 188 175 0.03      
14 B 3346 3127 19.26      
15 B 3246 3033 8.60      
16 B 3234 3022 8.03      
17 B 1722 1609 1.57      
18 B 1478 1381 0.55      
19 B 1333 1246 0.57      
20 B 1123 1049 3.27      
21 B 1047 979 32.05      
22 B 933 872 61.12      
23 B 629 588 5.84      
24 B 471 440 9.11      

Unscaled Zero Point Vibrational Energy (zpe) 19095.3 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 17842.7 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=FULL/6-31G**
ABC
0.70736 0.19022 0.15455

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.117 0.724 0.558
C2 -0.117 -0.724 0.558
C3 -0.117 1.522 -0.494
C4 0.117 -1.522 -0.494
H5 0.486 1.163 1.478
H6 -0.486 -1.163 1.478
H7 0.092 2.580 -0.455
H8 -0.535 1.131 -1.410
H9 -0.092 -2.580 -0.455
H10 0.535 -1.131 -1.410

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.46691.34072.48011.08402.18392.11492.11293.46252.7366
C21.46692.48011.34072.18391.08403.46252.73662.11492.1129
C31.34072.48013.05282.09323.35131.07941.08064.10232.8814
C42.48011.34073.05283.35132.09324.10232.88141.07941.0806
H51.08402.18392.09323.35132.51992.42983.06374.25223.6884
H62.18391.08403.35132.09322.51994.25223.68842.42983.0637
H72.11493.46251.07944.10232.42984.25221.84545.16363.8573
H82.11292.73661.08062.88143.06373.68841.84543.85732.5025
H93.46252.11494.10231.07944.25222.42985.16363.85731.8454
H102.73662.11292.88141.08063.68843.06373.85732.50251.8454

picture of 1,3-Butadiene state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 124.034 C1 C2 H6 116.971
C1 C3 H7 121.455 C1 C3 H8 121.158
C2 C1 C3 124.034 C2 C1 H5 116.971
C2 C4 H9 121.455 C2 C4 H10 121.158
C3 C1 H5 118.987 C4 C2 H6 118.987
H7 C3 H8 117.382 H9 C4 H10 117.382
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability