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, (E)-)

using model chemistry: B2PLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2h 1Ag
Energy calculated at B2PLYP/6-31G*
 hartrees
Energy at 0K-157.012428
Energy at 298.15K-157.020175
HF Energy-156.841478
Nuclear repulsion energy115.676612
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 B2PLYP/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 3168 3007 0.00      
2 Ag 3151 2991 0.00      
3 Ag 3066 2910 0.00      
4 Ag 1768 1678 0.00      
5 Ag 1542 1464 0.00      
6 Ag 1463 1388 0.00      
7 Ag 1357 1288 0.00      
8 Ag 1194 1133 0.00      
9 Ag 895 850 0.00      
10 Ag 506 480 0.00      
11 Au 3120 2962 54.78      
12 Au 1531 1453 11.21      
13 Au 1098 1042 0.32      
14 Au 1017 965 27.11      
15 Au 246 234 3.02      
16 Au 178 169 0.99      
17 Bg 3120 2962 0.00      
18 Bg 1531 1453 0.00      
19 Bg 1087 1032 0.00      
20 Bg 756 717 0.00      
21 Bg 230 219 0.00      
22 Bu 3175 3014 77.88      
23 Bu 3149 2989 18.04      
24 Bu 3065 2909 65.90      
25 Bu 1549 1470 13.76      
26 Bu 1461 1387 3.13      
27 Bu 1360 1291 4.91      
28 Bu 1102 1046 1.03      
29 Bu 1010 959 13.03      
30 Bu 285 270 0.89      

Unscaled Zero Point Vibrational Energy (zpe) 24090.3 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 22866.5 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 B2PLYP/6-31G*
ABC
1.15849 0.12393 0.11679

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.326 0.583 0.000
C2 -0.326 -0.583 0.000
C3 -0.326 1.935 0.000
C4 0.326 -1.935 0.000
H5 1.416 0.573 0.000
H6 -1.416 -0.573 0.000
H7 -1.416 1.849 0.000
H8 1.416 -1.849 0.000
H9 -0.033 2.519 0.880
H10 -0.033 2.519 -0.880
H11 0.033 -2.519 0.880
H12 0.033 -2.519 -0.880

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C11.33681.50082.51821.09012.09152.15352.66502.15612.15613.23783.2378
C21.33682.51821.50082.09151.09012.66502.15353.23783.23782.15612.1561
C31.50082.51823.92442.21152.73471.09344.16541.09601.09604.55394.5539
C42.51821.50083.92442.73472.21154.16541.09344.55394.55391.09601.0960
H51.09012.09152.21152.73473.05593.10652.42182.58032.58033.50003.5000
H62.09151.09012.73472.21153.05592.42183.10653.50003.50002.58032.5803
H72.15352.66501.09344.16543.10652.42184.65751.77151.77154.68474.6847
H82.66502.15354.16541.09342.42183.10654.65754.68474.68471.77151.7715
H92.15613.23781.09604.55392.58033.50001.77154.68471.75935.03815.3364
H102.15613.23781.09604.55392.58033.50001.77154.68471.75935.33645.0381
H113.23782.15614.55391.09603.50002.58034.68471.77155.03815.33641.7593
H123.23782.15614.55391.09603.50002.58034.68471.77155.33645.03811.7593

picture of 2-Butene, (E)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 125.005 C1 C2 H6 118.692
C1 C3 H7 111.246 C1 C3 H9 111.301
C1 C3 H10 111.301 C2 C1 C3 125.005
C2 C1 H5 118.692 C2 C4 H8 111.246
C2 C4 H11 111.301 C2 C4 H12 111.301
C3 C1 H5 116.303 C4 C2 H6 116.303
H7 C3 H9 108.017 H7 C3 H10 108.017
H8 C4 H11 108.017 H8 C4 H12 108.017
H9 C3 H10 106.764 H11 C4 H12 106.764
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.118      
2 C -0.118      
3 C -0.498      
4 C -0.498      
5 H 0.138      
6 H 0.138      
7 H 0.159      
8 H 0.159      
9 H 0.160      
10 H 0.160      
11 H 0.160      
12 H 0.160      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.921 0.423 0.000
y 0.423 8.739 0.000
z 0.000 0.000 4.285


<r2> (average value of r2) Å2
<r2> 111.922
(<r2>)1/2 10.579