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: QCISD/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/6-31G**
 hartrees
Energy at 0K-156.739666
Energy at 298.15K-156.747331
HF Energy-156.120241
Nuclear repulsion energy117.320417
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 QCISD/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 3227 3038 68.87      
2 A 3211 3023 2.07      
3 A 3102 2920 13.08      
4 A 1780 1675 2.32      
5 A 1558 1467 3.91      
6 A 1477 1391 2.22      
7 A 1325 1247 0.00      
8 A 1055 993 0.62      
9 A 891 839 0.34      
10 A 300 282 0.00      
11 A 3161 2975 0.00      
12 A 1540 1450 0.00      
13 A 1085 1022 0.00      
14 A 1008 949 0.00      
15 A 382 360 0.00      
16 A 108 102 0.00      
17 A 3161 2976 55.46      
18 A 1545 1455 7.11      
19 A 1101 1037 3.01      
20 A 710 669 29.15      
21 A 112 106 0.55      
22 A 3206 3018 27.24      
23 A 3192 3005 1.64      
24 A 3098 2917 41.40      
25 A 1549 1458 1.92      
26 A 1490 1403 3.81      
27 A 1437 1353 5.13      
28 A 1187 1118 0.37      
29 A 1010 951 7.30      
30 A 572 538 4.69      

Unscaled Zero Point Vibrational Energy (zpe) 24290.3 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 22866.9 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 QCISD/6-31G**
ABC
0.54227 0.16885 0.13518

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.671 0.667
C2 0.000 -0.671 0.667
C3 0.000 1.591 -0.524
C4 0.000 -1.591 -0.524
H5 0.000 1.171 1.631
H6 0.000 -1.171 1.631
H7 0.000 1.052 -1.470
H8 0.000 -1.052 -1.470
H9 -0.879 2.240 -0.507
H10 0.879 2.240 -0.507
H11 0.879 -2.240 -0.507
H12 -0.879 -2.240 -0.507

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C11.34141.50502.55581.08622.07872.17082.74512.14752.14753.25893.2589
C21.34142.55581.50502.07871.08622.74512.17083.25893.25892.14752.1475
C31.50502.55583.18102.19603.50291.08832.80691.09251.09253.92973.9297
C42.55581.50503.18103.50292.19602.80691.08833.92973.92971.09251.0925
H51.08622.07872.19603.50292.34153.10363.81572.54692.54694.12014.1201
H62.07871.08623.50292.19602.34153.81573.10364.12014.12012.54692.5469
H72.17082.74511.08832.80693.10363.81572.10441.76341.76343.54063.5406
H82.74512.17082.80691.08833.81573.10362.10443.54063.54061.76341.7634
H92.14753.25891.09253.92972.54694.12011.76343.54061.75724.81174.4794
H102.14753.25891.09253.92972.54694.12011.76343.54061.75724.47944.8117
H113.25892.14753.92971.09254.12012.54693.54061.76344.81174.47941.7572
H123.25892.14753.92971.09254.12012.54693.54061.76344.47944.81171.7572

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 127.674 C1 C2 H6 117.409
C1 C3 H7 112.681 C1 C3 H9 110.528
C1 C3 H10 110.528 C2 C1 C3 127.674
C2 C1 H5 117.409 C2 C4 H8 112.681
C2 C4 H11 110.528 C2 C4 H12 110.528
C3 C1 H5 114.917 C4 C2 H6 114.917
H7 C3 H9 107.915 H7 C3 H10 107.915
H8 C4 H11 107.915 H8 C4 H12 107.915
H9 C3 H10 107.062 H11 C4 H12 107.062
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability