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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: MP4=FULL/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 MP4=FULL/6-311+G(3df,2p)
 hartrees
Energy at 0K-2649.605288
Energy at 298.15K-2649.607590
HF Energy-2648.628450
Nuclear repulsion energy123.620681
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 MP4=FULL/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 3471 3471        
2 Σ 2072 2072        
3 Σ 608 608        
4 Π 616 616        
4 Π 616 616        
5 Π 297 297        
5 Π 297 297        

Unscaled Zero Point Vibrational Energy (zpe) 3987.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3987.8 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 MP4=FULL/6-311+G(3df,2p)
B
0.13271

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-311+G(3df,2p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.321
C2 0.000 0.000 -1.107
Br3 0.000 0.000 0.684
H4 0.000 0.000 -3.384

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21393.00571.0632
C21.21391.79172.2771
Br33.00571.79174.0688
H41.06322.27714.0688

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