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 HCCCl (Chloroacetylene)

using model chemistry: QCISD(T)=FULL/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at QCISD(T)=FULL/cc-pVDZ
 hartrees
Energy at 0K-536.171578
Energy at 298.15K-536.171010
HF Energy-535.732431
Nuclear repulsion energy73.263239
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 QCISD(T)=FULL/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 3475 3332        
2 Σ 2145 2057        
3 Σ 748 717        
4 Π 592 568        
4 Π 592 568        
5 Π 302 290        
5 Π 302 290        

Unscaled Zero Point Vibrational Energy (zpe) 4077.9 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 3910.7 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 QCISD(T)=FULL/cc-pVDZ
B
0.18339

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/cc-pVDZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.847
C2 0.000 0.000 -0.620
Cl3 0.000 0.000 1.043
H4 0.000 0.000 -2.924

Atom - Atom Distances (Å)
  C1 C2 Cl3 H4
C11.22632.88941.0771
C21.22631.66312.3035
Cl32.88941.66313.9666
H41.07712.30353.9666

picture of Chloroacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Cl3 180.000 C2 C1 H4 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability