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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: QCISD/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 QCISD/6-311G*
 hartrees
Energy at 0K-2649.015749
Energy at 298.15K-2649.017772
HF Energy-2648.610564
Nuclear repulsion energy123.048786
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/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 3464 3316 67.95      
2 Σ 2152 2060 10.21      
3 Σ 605 579 0.64      
4 Π 545 522 50.05      
4 Π 545 522 50.05      
5 Π 228 218 0.85      
5 Π 228 218 0.85      

Unscaled Zero Point Vibrational Energy (zpe) 3883.2 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 3717.8 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/6-311G*
B
0.13159

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.328
C2 0.000 0.000 -1.117
Br3 0.000 0.000 0.688
H4 0.000 0.000 -3.396

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21093.01591.0673
C21.21091.80502.2782
Br33.01591.80504.0832
H41.06732.27824.0832

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