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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: MP2=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 MP2=FULL/cc-pVTZ
 hartrees
Energy at 0K-2649.323531
Energy at 298.15K-2649.325963
HF Energy-2648.717817
Nuclear repulsion energy124.509271
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=FULL/cc-pVTZ
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 3521 3343 90.56      
2 Σ 2112 2005 19.04      
3 Σ 626 594 1.24      
4 Π 645 613 41.84      
4 Π 645 613 41.84      
5 Π 333 316 6.16      
5 Π 333 316 6.16      

Unscaled Zero Point Vibrational Energy (zpe) 4107.4 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 3899.5 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=FULL/cc-pVTZ
B
0.13457

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.307
C2 0.000 0.000 -1.097
Br3 0.000 0.000 0.680
H4 0.000 0.000 -3.362

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20992.98631.0554
C21.20991.77642.2653
Br32.98631.77644.0417
H41.05542.26534.0417

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