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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: HSEh1PBE/3-21G

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 HSEh1PBE/3-21G
 hartrees
Energy at 0K-2637.677950
Energy at 298.15K-2637.680781
HF Energy-2637.677950
Nuclear repulsion energy122.406423
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 HSEh1PBE/3-21G
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 3527 3398 89.94      
2 Σ 2255 2172 17.14      
3 Σ 612 590 0.52      
4 Π 910 877 33.51      
4 Π 910 877 33.51      
5 Π 444 427 20.73      
5 Π 444 427 20.73      

Unscaled Zero Point Vibrational Energy (zpe) 4550.5 cm-1
Scaled (by 0.9633) Zero Point Vibrational Energy (zpe) 4383.5 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 HSEh1PBE/3-21G
B
0.13037

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.335
C2 0.000 0.000 -1.133
Br3 0.000 0.000 0.692
H4 0.000 0.000 -3.396

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20163.02621.0611
C21.20161.82462.2627
Br33.02621.82464.0873
H41.06112.26274.0873

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 HSEh1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.429      
2 C -0.318      
3 Br 0.463      
4 H 0.284      


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 -0.145 0.145
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.511 0.000 0.000
y 0.000 -30.511 0.000
z 0.000 0.000 -21.835
Traceless
 xyz
x -4.338 0.000 0.000
y 0.000 -4.338 0.000
z 0.000 0.000 8.676
Polar
3z2-r217.352
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 1.415 0.000 0.000
y 0.000 1.415 0.000
z 0.000 0.000 7.782


<r2> (average value of r2) Å2
<r2> 85.928
(<r2>)1/2 9.270