return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for HCCCl (Chloroacetylene)

using model chemistry: B2PLYP=FULL/6-31+G**

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 B2PLYP=FULL/6-31+G**
 hartrees
Energy at 0K-536.686162
Energy at 298.15K-536.685534
HF Energy-536.548661
Nuclear repulsion energy74.036563
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 B2PLYP=FULL/6-31+G**
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 3515 3343 94.18      
2 Σ 2176 2069 43.78      
3 Σ 756 719 10.64      
4 Π 579 551 61.24      
4 Π 579 551 61.24      
5 Π 286 272 0.62      
5 Π 286 272 0.62      

Unscaled Zero Point Vibrational Energy (zpe) 4088.6 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 3888.3 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 B2PLYP=FULL/6-31+G**
B
0.18725

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-31+G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.827
C2 0.000 0.000 -0.615
Cl3 0.000 0.000 1.032
H4 0.000 0.000 -2.891

Atom - Atom Distances (Å)
  C1 C2 Cl3 H4
C11.21202.85931.0633
C21.21201.64732.2752
Cl32.85931.64733.9226
H41.06332.27523.9226

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