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 CH3CHCHCH3 (2-Butene, (Z)-)

using model chemistry: MP2/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-156.682950
Energy at 298.15K-156.690610
HF Energy-156.119590
Nuclear repulsion energy116.741626
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/cc-pVDZ
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 3212 3059 50.28      
2 A 3198 3046 0.91      
3 A 3080 2934 13.80      
4 A 1738 1655 3.31      
5 A 1492 1421 4.86      
6 A 1414 1347 2.68      
7 A 1286 1225 0.03      
8 A 1024 975 0.55      
9 A 886 844 0.52      
10 A 291 277 0.01      
11 A 3155 3005 0.00      
12 A 1478 1407 0.00      
13 A 1048 998 0.00      
14 A 996 949 0.00      
15 A 383 365 0.00      
16 A 121 116 0.00      
17 A 3155 3005 34.06      
18 A 1483 1413 10.89      
19 A 1064 1013 2.29      
20 A 697 664 33.37      
21 A 122 117 0.82      
22 A 3197 3045 18.48      
23 A 3177 3026 0.10      
24 A 3078 2931 34.43      
25 A 1486 1416 3.22      
26 A 1440 1372 7.07      
27 A 1377 1311 3.48      
28 A 1159 1104 0.27      
29 A 1001 953 11.76      
30 A 560 533 6.08      

Unscaled Zero Point Vibrational Energy (zpe) 23897.9 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 22762.8 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/cc-pVDZ
ABC
0.53546 0.16821 0.13447

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.676 0.670
C2 0.000 -0.676 0.670
C3 0.000 1.590 -0.527
C4 0.000 -1.590 -0.527
H5 0.000 1.175 1.648
H6 0.000 -1.175 1.648
H7 0.000 1.043 -1.481
H8 0.000 -1.043 -1.481
H9 -0.887 2.249 -0.512
H10 0.887 2.249 -0.512
H11 0.887 -2.249 -0.512
H12 -0.887 -2.249 -0.512

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C11.35231.50562.56291.09852.09422.18122.75292.15782.15783.27693.2769
C21.35232.56291.50562.09421.09852.75292.18123.27693.27692.15782.1578
C31.50562.56293.18102.21393.51841.09992.80101.10431.10433.94033.9403
C42.56291.50563.18103.51842.21392.80101.09993.94033.94031.10431.1043
H51.09852.09422.21393.51842.35083.13153.83532.57022.57024.14474.1447
H62.09421.09853.51842.21392.35083.83533.13154.14474.14472.57022.5702
H72.18122.75291.09992.80103.13153.83532.08601.78251.78253.54393.5439
H82.75292.18122.80101.09993.83533.13152.08603.54393.54391.78251.7825
H92.15783.27691.10433.94032.57024.14471.78253.54391.77314.83444.4975
H102.15783.27691.10433.94032.57024.14471.78253.54391.77314.49754.8344
H113.27692.15783.94031.10434.14472.57023.54391.78254.83444.49751.7731
H123.27692.15783.94031.10434.14472.57023.54391.78254.49754.83441.7731

picture of 2-Butene, (Z)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 127.394 C1 C2 H6 117.029
C1 C3 H7 112.756 C1 C3 H9 110.598
C1 C3 H10 110.598 C2 C1 C3 127.394
C2 C1 H5 117.029 C2 C4 H8 112.756
C2 C4 H11 110.598 C2 C4 H12 110.598
C3 C1 H5 115.577 C4 C2 H6 115.577
H7 C3 H9 107.929 H7 C3 H10 107.929
H8 C4 H11 107.929 H8 C4 H12 107.929
H9 C3 H10 106.798 H11 C4 H12 106.798
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability