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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: MP2/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 MP2/cc-pVDZ
 hartrees
Energy at 0K-2649.001714
Energy at 298.15K-2649.003982
HF Energy-2648.615048
Nuclear repulsion energy122.748853
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/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 3503 3337 90.64      
2 Σ 2089 1990 16.06      
3 Σ 617 587 1.39      
4 Π 603 574 36.92      
4 Π 603 574 36.92      
5 Π 288 274 3.40      
5 Π 288 274 3.40      

Unscaled Zero Point Vibrational Energy (zpe) 3995.1 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 3805.3 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/cc-pVDZ
B
0.13075

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.341
C2 0.000 0.000 -1.110
Br3 0.000 0.000 0.689
H4 0.000 0.000 -3.416

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.23103.03031.0751
C21.23101.79932.3061
Br33.03031.79934.1054
H41.07512.30614.1054

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