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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B2PLYP=FULL/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=FULL/3-21G*
 hartrees
Energy at 0K-2637.785296
Energy at 298.15K-2637.787790
HF Energy-2637.674312
Nuclear repulsion energy123.083324
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=FULL/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 3512 3512 80.10      
2 Σ 2169 2169 12.14      
3 Σ 604 604 0.86      
4 Π 729 729 49.41      
4 Π 729 729 49.41      
5 Π 338 338 7.08      
5 Π 338 338 7.08      

Unscaled Zero Point Vibrational Energy (zpe) 4208.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4208.3 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 B2PLYP=FULL/3-21G*
B
0.13165

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/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 0.688
H4 0.000 0.000 -3.389

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21103.01591.0605
C21.21101.80492.2715
Br33.01591.80494.0764
H41.06052.27154.0764

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