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: M06-2X/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2h 1Ag
Energy calculated at M06-2X/3-21G*
 hartrees
Energy at 0K-156.278913
Energy at 298.15K-156.286833
HF Energy-156.278913
Nuclear repulsion energy115.586147
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 M06-2X/3-21G*
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 3149 2983 0.00      
2 Ag 3120 2955 0.00      
3 Ag 3081 2918 0.00      
4 Ag 1773 1679 0.00      
5 Ag 1566 1483 0.00      
6 Ag 1475 1397 0.00      
7 Ag 1379 1306 0.00      
8 Ag 1197 1134 0.00      
9 Ag 900 852 0.00      
10 Ag 521 493 0.00      
11 Au 3146 2980 30.06      
12 Au 1556 1474 19.67      
13 Au 1118 1059 0.83      
14 Au 1037 982 45.01      
15 Au 257 243 4.08      
16 Au 219 208 1.85      
17 Bg 3147 2980 0.00      
18 Bg 1556 1474 0.00      
19 Bg 1129 1069 0.00      
20 Bg 800 758 0.00      
21 Bg 246 233 0.00      
22 Bu 3152 2986 38.08      
23 Bu 3127 2962 13.38      
24 Bu 3080 2917 31.55      
25 Bu 1573 1490 21.88      
26 Bu 1474 1397 12.25      
27 Bu 1374 1302 1.66      
28 Bu 1087 1030 0.48      
29 Bu 1036 981 17.77      
30 Bu 296 280 0.80      

Unscaled Zero Point Vibrational Energy (zpe) 24284.2 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 23002.0 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 M06-2X/3-21G*
ABC
1.14902 0.12395 0.11676

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/3-21G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.330 0.578 0.000
C2 -0.330 -0.578 0.000
C3 -0.330 1.937 0.000
C4 0.330 -1.937 0.000
H5 1.419 0.570 0.000
H6 -1.419 -0.570 0.000
H7 -1.419 1.839 0.000
H8 1.419 -1.839 0.000
H9 -0.035 2.515 0.884
H10 -0.035 2.515 -0.884
H11 0.035 -2.515 0.884
H12 0.035 -2.515 -0.884

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C11.33051.51082.51491.08902.09162.15622.65102.16012.16013.22993.2299
C21.33052.51491.51082.09161.08902.65102.15623.22993.22992.16012.1601
C31.51082.51493.92992.21932.73361.09404.16141.09631.09634.55344.5534
C42.51491.51083.92992.73362.21934.16141.09404.55344.55341.09631.0963
H51.08902.09162.21932.73363.05803.10862.40922.58372.58373.49483.4948
H62.09161.08902.73362.21933.05802.40923.10863.49483.49482.58372.5837
H72.15622.65101.09404.16143.10862.40924.64581.77611.77614.67454.6745
H82.65102.15624.16141.09402.40923.10864.64584.67454.67451.77611.7761
H92.16013.22991.09634.55342.58373.49481.77614.67451.76775.03015.3317
H102.16013.22991.09634.55342.58373.49481.77614.67451.76775.33175.0301
H113.22992.16014.55341.09633.49482.58374.67451.77615.03015.33171.7677
H123.22992.16014.55341.09633.49482.58374.67451.77615.33175.03011.7677

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 124.410 C1 C2 H6 119.314
C1 C3 H7 110.730 C1 C3 H9 110.900
C1 C3 H10 110.900 C2 C1 C3 124.410
C2 C1 H5 119.314 C2 C4 H8 110.730
C2 C4 H11 110.900 C2 C4 H12 110.900
C3 C1 H5 116.276 C4 C2 H6 116.276
H7 C3 H9 108.370 H7 C3 H10 108.370
H8 C4 H11 108.370 H8 C4 H12 108.370
H9 C3 H10 107.455 H11 C4 H12 107.455
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.196      
2 C -0.196      
3 C -0.611      
4 C -0.611      
5 H 0.189      
6 H 0.189      
7 H 0.201      
8 H 0.201      
9 H 0.208      
10 H 0.208      
11 H 0.208      
12 H 0.208      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.420 0.259 0.000
y 0.259 -24.883 0.000
z 0.000 0.000 -28.227
Traceless
 xyz
x 1.135 0.259 0.000
y 0.259 1.940 0.000
z 0.000 0.000 -3.075
Polar
3z2-r2-6.150
x2-y2-0.537
xy0.259
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.570 0.465 0.000
y 0.465 8.294 0.000
z 0.000 0.000 3.846


<r2> (average value of r2) Å2
<r2> 111.887
(<r2>)1/2 10.578