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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: MP4/aug-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 MP4/aug-cc-pVTZ
 hartrees
Energy at 0K-2649.305546
Energy at 298.15K-2649.307851
HF Energy-2648.717825
Nuclear repulsion energy123.456086
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/aug-cc-pVTZ
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 3458 3366        
2 Σ 2068 2012        
3 Σ 604 588        
4 Π 614 597        
4 Π 614 597        
5 Π 299 291        
5 Π 299 291        

Unscaled Zero Point Vibrational Energy (zpe) 3977.1 cm-1
Scaled (by 0.9732) Zero Point Vibrational Energy (zpe) 3870.5 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 MP4/aug-cc-pVTZ
B
0.13235

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/aug-cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.325
C2 0.000 0.000 -1.108
Br3 0.000 0.000 0.685
H4 0.000 0.000 -3.388

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21663.01021.0633
C21.21661.79362.2799
Br33.01021.79364.0736
H41.06332.27994.0736

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