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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: HF/6-31G(2df,p)

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 HF/6-31G(2df,p)
 hartrees
Energy at 0K-2646.309743
Energy at 298.15K-2646.312476
HF Energy-2646.309743
Nuclear repulsion energy125.579361
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 HF/6-31G(2df,p)
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 3662 3316 93.81      
2 Σ 2392 2166 8.77      
3 Σ 665 602 0.33      
4 Π 832 753 42.50      
4 Π 832 753 42.50      
5 Π 398 361 8.15      
5 Π 398 361 8.15      

Unscaled Zero Point Vibrational Energy (zpe) 4589.8 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 4156.1 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 HF/6-31G(2df,p)
B
0.13717

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G(2df,p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.278
C2 0.000 0.000 -1.098
Br3 0.000 0.000 0.674
H4 0.000 0.000 -3.332

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.17962.95141.0541
C21.17961.77182.2338
Br32.95141.77184.0055
H41.05412.23384.0055

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 HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.394      
2 C -0.103      
3 Br 0.232      
4 H 0.265      


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 -0.607 0.607
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.450 0.000 0.000
y 0.000 -30.450 0.000
z 0.000 0.000 -21.713
Traceless
 xyz
x -4.368 0.000 0.000
y 0.000 -4.368 0.000
z 0.000 0.000 8.737
Polar
3z2-r217.473
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.540 0.000 0.000
y 0.000 3.540 0.000
z 0.000 0.000 8.517


<r2> (average value of r2) Å2
<r2> 82.549
(<r2>)1/2 9.086