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: mPW1PW91/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2h 1Ag
Energy calculated at mPW1PW91/cc-pVTZ
 hartrees
Energy at 0K-157.240329
Energy at 298.15K-157.248098
Nuclear repulsion energy116.302136
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 mPW1PW91/cc-pVTZ
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 3137 3009 0.00      
2 A 3120 2993 0.00      
3 A 3036 2912 0.00      
4 A 1765 1693 0.00      
5 A 1487 1427 0.00      
6 A 1413 1355 0.00      
7 A 1336 1282 0.00      
8 A 1175 1127 0.00      
9 A 882 846 0.00      
10 A 502 482 0.00      
11 A 3087 2961 39.47      
12 A 1478 1418 13.85      
13 A 1069 1025 1.28      
14 A 1007 966 35.69      
15 A 250 240 3.77      
16 A 182 174 1.14      
17 A 3088 2962 0.00      
18 A 1478 1418 0.00      
19 A 1074 1030 0.00      
20 A 764 733 0.00      
21 A 235 225 0.00      
22 A 3144 3016 70.07      
23 A 3119 2992 12.52      
24 A 3036 2912 63.45      
25 A 1496 1435 20.19      
26 A 1412 1354 4.79      
27 A 1331 1276 4.12      
28 A 1094 1049 4.12      
29 A 988 947 15.84      
30 A 277 266 1.27      

Unscaled Zero Point Vibrational Energy (zpe) 23729.8 cm-1
Scaled (by 0.9592) Zero Point Vibrational Energy (zpe) 22761.6 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 mPW1PW91/cc-pVTZ
ABC
1.17130 0.12536 0.11815

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/cc-pVTZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.663 0.000
C2 0.000 -0.663 0.000
C3 -1.219 1.523 0.000
C4 1.219 -1.523 0.000
H5 0.956 1.182 0.000
H6 -0.956 -1.182 0.000
H7 -2.129 0.923 0.000
H8 2.129 -0.923 0.000
H9 -1.242 2.176 0.876
H10 -1.242 2.176 -0.876
H11 1.242 -2.176 0.876
H12 1.242 -2.176 -0.876

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C11.32611.49162.50281.08772.07832.14462.65482.14432.14433.22003.2200
C21.32612.50281.49162.07831.08772.65482.14463.22003.22002.14432.1443
C31.49162.50283.90122.20102.71811.08994.14601.09291.09294.52794.5279
C42.50281.49163.90122.71812.20104.14601.08994.52794.52791.09291.0929
H51.08772.07832.20102.71813.04073.09542.41022.56582.56583.48233.4823
H62.07831.08772.71812.20103.04072.41023.09543.48233.48232.56582.5658
H72.14462.65481.08994.14603.09542.41024.64071.76741.76744.66174.6617
H82.65482.14464.14601.08992.41023.09544.64074.66174.66171.76741.7674
H92.14433.22001.09294.52792.56583.48231.76744.66171.75265.01025.3079
H102.14433.22001.09294.52792.56583.48231.76744.66171.75265.30795.0102
H113.22002.14434.52791.09293.48232.56584.66171.76745.01025.30791.7526
H123.22002.14434.52791.09293.48232.56584.66171.76745.30795.01021.7526

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 125.202 C1 C2 H6 118.521
C1 C3 H7 111.407 C1 C3 H9 111.193
C1 C3 H10 111.193 C2 C1 C3 125.202
C2 C1 H5 118.521 C2 C4 H8 111.407
C2 C4 H11 111.193 C2 C4 H12 111.193
C3 C1 H5 116.277 C4 C2 H6 116.277
H7 C3 H9 108.126 H7 C3 H10 108.126
H8 C4 H11 108.126 H8 C4 H12 108.126
H9 C3 H10 106.601 H11 C4 H12 106.601
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.120 0.000    
2 C -0.120 0.000    
3 C -0.232 0.000    
4 C -0.232 0.000    
5 H 0.093 0.000    
6 H 0.093 0.000    
7 H 0.083 0.000    
8 H 0.083 0.000    
9 H 0.088 0.000    
10 H 0.088 0.000    
11 H 0.088 0.000    
12 H 0.088 0.000    


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 -25.772 0.046 0.000
y 0.046 -25.023 0.000
z 0.000 0.000 -27.884
Traceless
 xyz
x 0.681 0.046 0.000
y 0.046 1.805 0.000
z 0.000 0.000 -2.487
Polar
3z2-r2-4.974
x2-y2-0.749
xy0.046
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.746 0.273 0.000
y 0.273 10.043 0.000
z 0.000 0.000 5.401


<r2> (average value of r2) Å2
<r2> 110.878
(<r2>)1/2 10.530