return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: MP3=FULL/6-31+G**

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 MP3=FULL/6-31+G**
 hartrees
Energy at 0K-2646.562139
Energy at 298.15K-2646.564885
HF Energy-2646.144360
Nuclear repulsion energy123.836132
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 MP3=FULL/6-31+G**
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 3565 3321 85.55      
2 Σ 2246 2092 20.06      
3 Σ 614 572 1.11      
4 Π 719 670 49.39      
4 Π 719 670 49.39      
5 Π 468 436 12.74      
5 Π 468 436 12.74      

Unscaled Zero Point Vibrational Energy (zpe) 4399.3 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 4098.4 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 MP3=FULL/6-31+G**
B
0.13326

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31+G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.314
C2 0.000 0.000 -1.109
Br3 0.000 0.000 0.683
H4 0.000 0.000 -3.375

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20552.99781.0604
C21.20551.79232.2659
Br32.99781.79234.0582
H41.06042.26594.0582

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