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: CCSD(T)/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD(T)/cc-pVTZ
 hartrees
Energy at 0K-636.700249
Energy at 298.15K-636.702498
HF Energy-635.884523
Nuclear repulsion energy145.028759
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 CCSD(T)/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' 3255 3173        
2 A' 3220 3139        
3 A' 1709 1666        
4 A' 1366 1332        
5 A' 1262 1230        
6 A' 1085 1058        
7 A' 816 795        
8 A' 661 644        
9 A' 196 191        
10 A" 875 853        
11 A" 754 735        
12 A" 448 437        

Unscaled Zero Point Vibrational Energy (zpe) 7823.2 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 7626.0 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 CCSD(T)/cc-pVTZ
ABC
0.55043 0.12297 0.10052

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.870 0.000
C2 1.253 0.419 0.000
Cl3 -1.380 -0.167 0.000
F4 1.559 -0.879 0.000
H5 -0.199 1.929 0.000
H6 2.112 1.076 0.000

Atom - Atom Distances (Å)
  C1 C2 Cl3 F4 H5 H6
C11.33171.72632.34281.07802.1222
C21.33172.69791.33352.09511.0812
Cl31.72632.69793.02462.40613.7070
F42.34281.33353.02463.31322.0312
H51.07802.09512.40613.31322.4639
H62.12221.08123.70702.03122.4639

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 123.052 C1 C2 H6 122.824
C2 C1 Cl3 123.309 C2 C1 H5 120.429
Cl3 C1 H5 116.262 F4 C2 H6 114.124
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability