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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: G2

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 G2
 hartrees
Energy at 0K-2649.162164
Energy at 298.15K-2649.157853
HF Energy-2646.116794
Nuclear repulsion energy124.555348
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 HF/6-31G*
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 3668 3456 83.36      
2 Σ 2391 2253 11.36      
3 Σ 638 601 0.56      
4 Π 893 841 44.02      
4 Π 893 841 44.02      
5 Π 420 396 10.47      
5 Π 420 396 10.47      

Unscaled Zero Point Vibrational Energy (zpe) 4661.2 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 4391.8 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/6-31G*
B
0.13270

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.322
C2 0.000 0.000 -1.105
Br3 0.000 0.000 0.684
H4 0.000 0.000 -3.388

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21743.00671.0658
C21.21741.78932.2832
Br33.00671.78934.0725
H41.06582.28324.0725

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