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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: MP2=FULL/6-311G*

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=FULL/6-311G*
 hartrees
Energy at 0K-2649.428728
Energy at 298.15K-2649.430694
HF Energy-2648.609717
Nuclear repulsion energy123.538011
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/6-311G*
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 3491 3306 79.76      
2 Σ 2090 1979 14.22      
3 Σ 617 584 1.39      
4 Π 523 495 52.35      
4 Π 523 495 52.35      
5 Π 216 205 0.18      
5 Π 216 205 0.18      

Unscaled Zero Point Vibrational Energy (zpe) 3837.7 cm-1
Scaled (by 0.9471) Zero Point Vibrational Energy (zpe) 3634.7 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 MP2=FULL/6-311G*
B
0.13250

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311G*

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 -1.106
Br3 0.000 0.000 0.685
H4 0.000 0.000 -3.389

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21763.00881.0650
C21.21761.79122.2826
Br33.00881.79124.0738
H41.06502.28264.0738

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