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All results from a given calculation for CH3CHCHCH3 (2-Butene, (Z)-)

using model chemistry: MP2/CEP-31G

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/CEP-31G
 hartrees
Energy at 0K-26.835501
Energy at 298.15K-26.843016
HF Energy-26.510905
Nuclear repulsion energy64.902156
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/CEP-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 3163 3056 129.28      
2 A 3145 3039 0.04      
3 A 3031 2929 27.73      
4 A 1686 1630 3.58      
5 A 1527 1476 7.84      
6 A 1466 1416 7.14      
7 A 1298 1254 0.49      
8 A 1038 1003 1.16      
9 A 861 832 0.76      
10 A 289 279 0.07      
11 A 3108 3003 0.00      
12 A 1502 1451 0.00      
13 A 1069 1033 0.00      
14 A 935 903 0.00      
15 A 352 340 0.00      
16 A 102 99 0.00      
17 A 3109 3005 107.25      
18 A 1511 1460 16.61      
19 A 1089 1052 3.73      
20 A 696 672 69.34      
21 A 96 93 0.94      
22 A 3140 3034 56.00      
23 A 3108 3003 2.77      
24 A 3027 2925 60.10      
25 A 1521 1470 6.74      
26 A 1457 1408 2.86      
27 A 1417 1369 3.30      
28 A 1173 1134 1.43      
29 A 992 958 10.61      
30 A 555 536 6.20      

Unscaled Zero Point Vibrational Energy (zpe) 23729.3 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 22929.6 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/CEP-31G
ABC
0.51211 0.16030 0.12810

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.697 0.689
C2 0.000 -0.697 0.689
C3 0.000 1.632 -0.542
C4 0.000 -1.632 -0.542
H5 0.000 1.204 1.672
H6 0.000 -1.204 1.672
H7 0.000 1.069 -1.497
H8 0.000 -1.069 -1.497
H9 -0.897 2.291 -0.530
H10 0.897 2.291 -0.530
H11 0.897 -2.291 -0.530
H12 -0.897 -2.291 -0.530

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C11.39331.54592.63371.10612.14012.21752.80992.19822.19823.34893.3489
C21.39332.63371.54592.14011.10612.80992.21753.34893.34892.19822.1982
C31.54592.63373.26322.25463.59781.10862.86421.11301.11304.02364.0236
C42.63371.54593.26323.59782.25462.86421.10864.02364.02361.11301.1130
H51.10612.14012.25463.59782.40893.17173.89982.61402.61404.22724.2272
H62.14011.10613.59782.25462.40893.89983.17174.22724.22722.61402.6140
H72.21752.80991.10862.86423.17173.89982.13731.79781.79783.60893.6089
H82.80992.21752.86421.10863.89983.17172.13733.60893.60891.79781.7978
H92.19823.34891.11304.02362.61404.22721.79783.60891.79354.92004.5815
H102.19823.34891.11304.02362.61404.22721.79783.60891.79354.58154.9200
H113.34892.19824.02361.11304.22722.61403.60891.79784.92004.58151.7935
H123.34892.19824.02361.11304.22722.61403.60891.79784.58154.92001.7935

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 127.216 C1 C2 H6 117.330
C1 C3 H7 112.267 C1 C3 H9 110.472
C1 C3 H10 110.472 C2 C1 C3 127.216
C2 C1 H5 117.330 C2 C4 H8 112.267
C2 C4 H11 110.472 C2 C4 H12 110.472
C3 C1 H5 115.455 C4 C2 H6 115.455
H7 C3 H9 108.050 H7 C3 H10 108.050
H8 C4 H11 108.050 H8 C4 H12 108.050
H9 C3 H10 107.357 H11 C4 H12 107.357
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability