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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: QCISD(T)=FULL/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 QCISD(T)=FULL/cc-pVTZ
 hartrees
Energy at 0K-2649.361293
Energy at 298.15K-2649.363708
HF Energy-2648.718328
Nuclear repulsion energy123.978949
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 QCISD(T)=FULL/cc-pVTZ
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 3491 3340        
2 Σ 2144 2051        
3 Σ 610 584        
4 Π 651 623        
4 Π 651 623        
5 Π 327 312        
5 Π 327 312        

Unscaled Zero Point Vibrational Energy (zpe) 4099.9 cm-1
Scaled (by 0.9569) Zero Point Vibrational Energy (zpe) 3923.2 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 QCISD(T)=FULL/cc-pVTZ
B
0.13352

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.313
C2 0.000 0.000 -1.106
Br3 0.000 0.000 0.682
H4 0.000 0.000 -3.370

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20702.99581.0572
C21.20701.78872.2642
Br32.99581.78874.0529
H41.05722.26424.0529

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