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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B3PW91/TZVP

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/TZVP
 hartrees
Energy at 0K-2650.877885
Energy at 298.15K-2650.880257
HF Energy-2650.877885
Nuclear repulsion energy124.009663
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/TZVP
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 3483 3359 103.72      
2 Σ 2187 2109 30.95      
3 Σ 604 583 1.91      
4 Π 650 627 51.32      
4 Π 650 627 51.32      
5 Π 311 300 8.46      
5 Π 311 300 8.46      

Unscaled Zero Point Vibrational Energy (zpe) 4098.8 cm-1
Scaled (by 0.9643) Zero Point Vibrational Energy (zpe) 3952.5 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 B3PW91/TZVP
B
0.13367

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/TZVP

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 -3.373

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20112.99191.0637
C21.20111.79082.2648
Br32.99191.79084.0557
H41.06372.26484.0557

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/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.014      
2 C -0.231      
3 Br 0.035      
4 H 0.182      


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 -0.203 0.203
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.661 0.000 0.000
y 0.000 -30.661 0.000
z 0.000 0.000 -22.095
Traceless
 xyz
x -4.283 0.000 0.000
y 0.000 -4.283 0.000
z 0.000 0.000 8.566
Polar
3z2-r217.131
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 3.082 0.000 0.000
y 0.000 3.082 0.000
z 0.000 0.000 9.386


<r2> (average value of r2) Å2
<r2> 84.420
(<r2>)1/2 9.188