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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: QCISD/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-2649.019972
Energy at 298.15K-2649.022284
HF Energy-2648.616181
Nuclear repulsion energy122.454782
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/cc-pVDZ
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 3484 3343 80.45      
2 Σ 2159 2071 11.81      
3 Σ 606 582 0.72      
4 Π 630 604 35.53      
4 Π 630 604 35.53      
5 Π 295 283 4.38      
5 Π 295 283 4.38      

Unscaled Zero Point Vibrational Energy (zpe) 4049.6 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 3885.2 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/cc-pVDZ
B
0.13026

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.342
C2 0.000 0.000 -1.119
Br3 0.000 0.000 0.691
H4 0.000 0.000 -3.419

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.22293.03281.0768
C21.22291.80992.2997
Br33.03281.80994.1096
H41.07682.29974.1096

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