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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B2PLYP=FULLultrafine/3-21G*

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/3-21G*
 hartrees
Energy at 0K-2637.785288
Energy at 298.15K 
HF Energy-2637.674306
Nuclear repulsion energy123.097383
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/3-21G*
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 3511 3511 80.10      
2 Σ 2168 2168 12.16      
3 Σ 604 604 0.86      
4 Π 728 728 49.42      
4 Π 728 728 49.42      
5 Π 336 336 7.08      
5 Π 336 336 7.08      

Unscaled Zero Point Vibrational Energy (zpe) 4206.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4206.6 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/3-21G*
B
0.13168

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/3-21G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.328
C2 0.000 0.000 -1.117
Br3 0.000 0.000 0.687
H4 0.000 0.000 -3.389

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21103.01561.0605
C21.21101.80462.2715
Br33.01561.80464.0761
H41.06052.27154.0761

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