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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B2PLYP=FULLultrafine/6-31G

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=FULLultrafine/6-31G
 hartrees
Energy at 0K-2647.665429
Energy at 298.15K 
HF Energy-2647.583286
Nuclear repulsion energy121.367594
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=FULLultrafine/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 3523 3523 75.55      
2 Σ 2159 2159 10.02      
3 Σ 563 563 0.27      
4 Π 791 791 37.92      
4 Π 791 791 37.92      
5 Π 376 376 13.14      
5 Π 376 376 13.14      

Unscaled Zero Point Vibrational Energy (zpe) 4289.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4289.7 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 B2PLYP=FULLultrafine/6-31G
B
0.12811

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.357
C2 0.000 0.000 -1.141
Br3 0.000 0.000 0.697
H4 0.000 0.000 -3.421

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21653.05471.0637
C21.21651.83822.2802
Br33.05471.83824.1184
H41.06372.28024.1184

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