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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: CCSD(T)/6-311G*

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 CCSD(T)/6-311G*
 hartrees
Energy at 0K-2649.032535
Energy at 298.15K-2649.034335
HF Energy-2648.609785
Nuclear repulsion energy122.816566
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 CCSD(T)/6-311G*
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 3445 3316        
2 Σ 2111 2032        
3 Σ 598 576        
4 Π 502 483        
4 Π 502 483        
5 Π 174 168        
5 Π 174 168        

Unscaled Zero Point Vibrational Energy (zpe) 3752.8 cm-1
Scaled (by 0.9626) Zero Point Vibrational Energy (zpe) 3612.5 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 CCSD(T)/6-311G*
B
0.13106

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-311G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.334
C2 0.000 0.000 -1.118
Br3 0.000 0.000 0.689
H4 0.000 0.000 -3.403

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21653.02311.0686
C21.21651.80662.2851
Br33.02311.80664.0918
H41.06862.28514.0918

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