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: B3PW91/6-311G*

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 B3PW91/6-311G*
 hartrees
Energy at 0K-2650.833185
Energy at 298.15K-2650.835442
HF Energy-2650.833185
Nuclear repulsion energy124.017633
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 B3PW91/6-311G*
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 3474 3344 80.08      
2 Σ 2182 2101 26.35      
3 Σ 612 589 1.75      
4 Π 600 578 50.35      
4 Π 600 578 50.35      
5 Π 288 277 4.34      
5 Π 288 277 4.34      

Unscaled Zero Point Vibrational Energy (zpe) 4022.3 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 3872.3 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 B3PW91/6-311G*
B
0.13368

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.310
C2 0.000 0.000 -1.108
Br3 0.000 0.000 0.682
H4 0.000 0.000 -3.375

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20232.99221.0651
C21.20231.78992.2674
Br32.99221.78994.0572
H41.06512.26744.0572

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 B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.218      
2 C -0.128      
3 Br 0.093      
4 H 0.253      


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 -0.218 0.218
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.620 0.000 0.000
y 0.000 -30.620 0.000
z 0.000 0.000 -21.672
Traceless
 xyz
x -4.474 0.000 0.000
y 0.000 -4.474 0.000
z 0.000 0.000 8.948
Polar
3z2-r217.895
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 2.619 0.000 0.000
y 0.000 2.619 0.000
z 0.000 0.000 8.921


<r2> (average value of r2) Å2
<r2> 84.319
(<r2>)1/2 9.183