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 CHFCHCl ((E)-1-chloro-2-fluoroethene)

using model chemistry: MP2=FULL/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=FULL/3-21G
 hartrees
Energy at 0K-632.977088
Energy at 298.15K-632.979122
HF Energy-632.623463
Nuclear repulsion energy135.913740
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=FULL/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' 3324 3173 6.91      
2 A' 3277 3129 1.35      
3 A' 1708 1630 15.47      
4 A' 1398 1335 0.82      
5 A' 1251 1194 5.60      
6 A' 1140 1088 84.99      
7 A' 796 760 36.05      
8 A' 422 403 2.32      
9 A' 264 252 7.33      
10 A" 988 943 65.44      
11 A" 847 808 32.19      
12 A" 269 257 3.00      

Unscaled Zero Point Vibrational Energy (zpe) 7841.3 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 7486.9 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=FULL/3-21G
ABC
1.73968 0.07676 0.07351

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.519 0.000
C2 1.062 -0.278 0.000
Cl3 -1.679 -0.222 0.000
F4 2.349 0.232 0.000
H5 0.023 1.596 0.000
H6 1.013 -1.358 0.000

Atom - Atom Distances (Å)
  C1 C2 Cl3 F4 H5 H6
C11.32821.83562.36611.07742.1331
C21.32822.74241.38332.14311.0810
Cl31.83562.74244.05332.49082.9226
F42.36611.38334.05332.69632.0758
H51.07742.14312.49082.69633.1157
H62.13311.08102.92262.07583.1157

picture of (E)-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 121.508 C1 C2 H6 124.279
C2 C1 Cl3 119.311 C2 C1 H5 125.647
Cl3 C1 H5 115.042 F4 C2 H6 114.212
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability