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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: CCSD(T)/6-311+G(3df,2p)

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)/6-311+G(3df,2p)
 hartrees
Energy at 0K-2649.139536
Energy at 298.15K-2649.141828
HF Energy-2648.628883
Nuclear repulsion energy123.372348
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)/6-311+G(3df,2p)
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 3455 3410        
2 Σ 2118 2091        
3 Σ 604 597        
4 Π 620 612        
4 Π 620 612        
5 Π 291 287        
5 Π 291 287        

Unscaled Zero Point Vibrational Energy (zpe) 4000.8 cm-1
Scaled (by 0.9869) Zero Point Vibrational Energy (zpe) 3948.3 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 CCSD(T)/6-311+G(3df,2p)
B
0.13226

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-311+G(3df,2p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.323
C2 0.000 0.000 -1.113
Br3 0.000 0.000 0.686
H4 0.000 0.000 -3.388

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21043.00911.0650
C21.21041.79872.2754
Br33.00911.79874.0742
H41.06502.27544.0742

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