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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: CCSD(T)/cc-pVTZ

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)/cc-pVTZ
 hartrees
Energy at 0K-2649.287132
Energy at 298.15K-2649.289446
HF Energy-2648.717822
Nuclear repulsion energy123.542790
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)/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σ 3474 3387        
2 Σ 2129 2075        
3 Σ 606 591        
4 Π 619 603        
4 Π 619 603        
5 Π 300 292        
5 Π 300 292        

Unscaled Zero Point Vibrational Energy (zpe) 4022.4 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 3921.0 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)/cc-pVTZ
B
0.13259

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.321
C2 0.000 0.000 -1.110
Br3 0.000 0.000 0.685
H4 0.000 0.000 -3.384

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21083.00601.0628
C21.21081.79512.2736
Br33.00601.79514.0688
H41.06282.27364.0688

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