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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: HSEh1PBE/STO-3G

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/STO-3G
 hartrees
Energy at 0K-2621.466454
Energy at 298.15K-2621.468832
HF Energy-2621.466454
Nuclear repulsion energy123.594340
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/STO-3G
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 3726 3290 197.78      
2 Σ 2417 2134 4.35      
3 Σ 645 570 3.22      
4 Π 741 654 17.71      
4 Π 741 654 17.71      
5 Π 349 308 0.67      
5 Π 349 308 0.67      

Unscaled Zero Point Vibrational Energy (zpe) 4483.6 cm-1
Scaled (by 0.8831) Zero Point Vibrational Energy (zpe) 3959.4 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/STO-3G
B
0.13284

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.315
C2 0.000 0.000 -1.113
Br3 0.000 0.000 0.685
H4 0.000 0.000 -3.393

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20182.99951.0780
C21.20181.79782.2797
Br32.99951.79784.0775
H41.07802.27974.0775

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/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.127      
2 C -0.147      
3 Br 0.150      
4 H 0.124      


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 -0.174 0.174
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.292 0.000 0.000
y 0.000 -27.292 0.000
z 0.000 0.000 -22.623
Traceless
 xyz
x -2.334 0.000 0.000
y 0.000 -2.334 0.000
z 0.000 0.000 4.669
Polar
3z2-r29.337
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 0.424 0.000 0.000
y 0.000 0.424 0.000
z 0.000 0.000 5.115


<r2> (average value of r2) Å2
<r2> 83.578
(<r2>)1/2 9.142