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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: TPSSh/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 TPSSh/6-31+G**
 hartrees
Energy at 0K-2648.331011
Energy at 298.15K-2648.333732
HF Energy-2648.331011
Nuclear repulsion energy124.210729
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 TPSSh/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 3496 3365 96.94      
2 Σ 2174 2092 37.62      
3 Σ 612 589 2.26      
4 Π 700 674 52.08      
4 Π 700 674 52.08      
5 Π 464 446 13.66      
5 Π 464 446 13.66      

Unscaled Zero Point Vibrational Energy (zpe) 4304.1 cm-1
Scaled (by 0.9625) Zero Point Vibrational Energy (zpe) 4142.7 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 TPSSh/6-31+G**
B
0.13396

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.311
C2 0.000 0.000 -1.100
Br3 0.000 0.000 0.681
H4 0.000 0.000 -3.376

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21112.99201.0654
C21.21111.78092.2764
Br32.99201.78094.0574
H41.06542.27644.0574

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
Charges from optimized geometry at TPSSh/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.268      
2 C 0.017      
3 Br 0.021      
4 H 0.231      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.228 0.228
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.491 0.000 0.000
y 0.000 3.491 0.000
z 0.000 0.000 9.755


<r2> (average value of r2) Å2
<r2> 84.419
(<r2>)1/2 9.188