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 CHFCHClz ((Z)-1-Chloro-2-fluoroethene)

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-632.969881
Energy at 298.15K-632.972116
HF Energy-632.625120
Nuclear repulsion energy141.568436
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 MP2/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3328 3177 6.54      
2 A' 3262 3113 2.89      
3 A' 1723 1644 30.05      
4 A' 1422 1357 17.75      
5 A' 1291 1233 13.21      
6 A' 1074 1025 53.73      
7 A' 767 733 6.86      
8 A' 612 584 23.70      
9 A' 191 182 1.42      
10 A" 972 928 0.25      
11 A" 796 760 52.98      
12 A" 455 434 10.94      

Unscaled Zero Point Vibrational Energy (zpe) 7946.5 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 7585.0 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 MP2/3-21G
ABC
0.49817 0.12043 0.09699

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.934 0.000
C2 1.253 0.497 0.000
Cl3 -1.395 -0.247 0.000
F4 1.597 -0.837 0.000
H5 -0.273 1.977 0.000
H6 2.101 1.170 0.000

Atom - Atom Distances (Å)
  C1 C2 Cl3 F4 H5 H6
C11.32731.82842.38471.07732.1141
C21.32732.75101.37772.12531.0820
Cl31.82842.75103.04922.49123.7724
F42.38471.37773.04923.37792.0690
H51.07732.12532.49123.37792.5072
H62.11411.08203.77242.06902.5072

picture of (Z)-1-Chloro-2-fluoroethene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F4 123.659 C1 C2 H6 122.354
C2 C1 Cl3 120.501 C2 C1 H5 123.895
Cl3 C1 H5 115.604 F4 C2 H6 113.987
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability