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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: MP2/6-311+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 MP2/6-311+G(3df,2p)
 hartrees
Energy at 0K-2649.097198
Energy at 298.15K-2649.099519
HF Energy-2648.628433
Nuclear repulsion energy123.840412
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 MP2/6-311+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 3484 3287 90.94      
2 Σ 2082 1964 20.47      
3 Σ 619 584 1.05      
4 Π 620 585 43.57      
4 Π 620 585 43.57      
5 Π 300 283 5.24      
5 Π 300 283 5.24      

Unscaled Zero Point Vibrational Energy (zpe) 4012.3 cm-1
Scaled (by 0.9434) Zero Point Vibrational Energy (zpe) 3785.2 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 MP2/6-311+G(3df,2p)
B
0.13316

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311+G(3df,2p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.318
C2 0.000 0.000 -1.104
Br3 0.000 0.000 0.683
H4 0.000 0.000 -3.381

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21403.00121.0629
C21.21401.78722.2769
Br33.00121.78724.0640
H41.06292.27694.0640

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