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: PBEPBE/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBE/cc-pVTZ
 hartrees
Energy at 0K-157.048736
Energy at 298.15K-157.056351
Nuclear repulsion energy117.236648
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 PBEPBE/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 3074 3053 52.93      
2 A 3048 3027 8.84      
3 A 2955 2934 13.73      
4 A 1682 1671 5.30      
5 A 1441 1431 5.25      
6 A 1362 1352 5.41      
7 A 1251 1243 0.03      
8 A 991 984 0.81      
9 A 855 849 0.54      
10 A 278 276 0.01      
11 A 2996 2975 0.00      
12 A 1427 1417 0.00      
13 A 1018 1011 0.00      
14 A 969 962 0.00      
15 A 387 385 0.00      
16 A 140 139 0.00      
17 A 2996 2975 36.04      
18 A 1431 1421 11.95      
19 A 1023 1016 2.24      
20 A 669 665 37.33      
21 A 125 124 1.04      
22 A 3055 3034 16.82      
23 A 3036 3015 2.24      
24 A 2953 2932 40.60      
25 A 1436 1426 3.69      
26 A 1389 1379 13.09      
27 A 1337 1328 0.56      
28 A 1120 1112 0.32      
29 A 962 955 20.08      
30 A 553 549 7.18      

Unscaled Zero Point Vibrational Energy (zpe) 22978.4 cm-1
Scaled (by 0.9931) Zero Point Vibrational Energy (zpe) 22819.8 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 PBEPBE/cc-pVTZ
ABC
0.54259 0.16922 0.13549

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.670 0.664
C2 0.000 -0.670 0.664
C3 0.000 1.586 -0.522
C4 0.000 -1.586 -0.522
H5 0.000 1.171 1.638
H6 0.000 -1.171 1.638
H7 0.000 1.048 -1.478
H8 0.000 -1.048 -1.478
H9 -0.881 2.247 -0.508
H10 0.881 2.247 -0.508
H11 0.881 -2.247 -0.508
H12 -0.881 -2.247 -0.508

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10 H11 H12
C11.34101.49862.54931.09482.08292.17552.74652.15332.15333.26553.2655
C21.34102.54931.49862.08291.09482.74652.17553.26553.26552.15332.1533
C31.49862.54933.17182.19983.50231.09712.80191.10191.10193.93313.9331
C42.54931.49863.17183.50232.19982.80191.09713.93313.93311.10191.1019
H51.09482.08292.19983.50232.34153.11883.82542.55752.55754.13094.1309
H62.08291.09483.50232.19982.34153.82543.11884.13094.13092.55752.5575
H72.17552.74651.09712.80193.11883.82542.09571.77671.77673.54623.5462
H82.74652.17552.80191.09713.82543.11882.09573.54623.54621.77671.7767
H92.15333.26551.10193.93312.55754.13091.77673.54621.76274.82774.4944
H102.15333.26551.10193.93312.55754.13091.77673.54621.76274.49444.8277
H113.26552.15333.93311.10194.13092.55753.54621.77674.82774.49441.7627
H123.26552.15333.93311.10194.13092.55753.54621.77674.49444.82771.7627

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 127.653 C1 C2 H6 117.191
C1 C3 H7 112.977 C1 C3 H9 110.874
C1 C3 H10 110.874 C2 C1 C3 127.653
C2 C1 H5 117.191 C2 C4 H8 112.977
C2 C4 H11 110.874 C2 C4 H12 110.874
C3 C1 H5 115.156 C4 C2 H6 115.156
H7 C3 H9 107.795 H7 C3 H10 107.795
H8 C4 H11 107.795 H8 C4 H12 107.795
H9 C3 H10 106.227 H11 C4 H12 106.227
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.115      
2 C -0.115      
3 C -0.274      
4 C -0.274      
5 H 0.094      
6 H 0.094      
7 H 0.092      
8 H 0.092      
9 H 0.102      
10 H 0.102      
11 H 0.102      
12 H 0.102      


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 -0.251 0.251
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.155 0.000 0.000
y 0.000 -25.217 0.000
z 0.000 0.000 -26.378
Traceless
 xyz
x -2.358 0.000 0.000
y 0.000 2.049 0.000
z 0.000 0.000 0.309
Polar
3z2-r20.617
x2-y2-2.938
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.538 0.000 0.000
y 0.000 10.145 0.000
z 0.000 0.000 7.160


<r2> (average value of r2) Å2
<r2> 99.760
(<r2>)1/2 9.988