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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: MP2/TZVP

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 MP2/TZVP
 hartrees
Energy at 0K-2649.150967
Energy at 298.15K-2649.152942
HF Energy-2648.663445
Nuclear repulsion energy123.441892
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/TZVP
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 3519 3336 86.75      
2 Σ 2104 1995 18.86      
3 Σ 600 569 1.49      
4 Π 540 512 54.32      
4 Π 540 512 54.32      
5 Π 211 200 0.84      
5 Π 211 200 0.84      

Unscaled Zero Point Vibrational Energy (zpe) 3862.5 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 3661.3 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 MP2/TZVP
B
0.13236

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.324
C2 0.000 0.000 -1.111
Br3 0.000 0.000 0.685
H4 0.000 0.000 -3.385

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21303.00921.0616
C21.21301.79612.2746
Br33.00921.79614.0707
H41.06162.27464.0707

picture of bromoacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br3 180.000 C2 C1 H4 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability