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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: PBEPBE/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 PBEPBE/STO-3G
 hartrees
Energy at 0K-2621.240956
Energy at 298.15K-2621.243157
HF Energy-2621.240956
Nuclear repulsion energy122.786146
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 PBEPBE/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 3614 3301 185.57      
2 Σ 2308 2109 8.44      
3 Σ 620 567 3.85      
4 Π 651 595 18.57      
4 Π 651 595 18.57      
5 Π 315 288 0.49      
5 Π 315 288 0.49      

Unscaled Zero Point Vibrational Energy (zpe) 4237.1 cm-1
Scaled (by 0.9136) Zero Point Vibrational Energy (zpe) 3871.0 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 PBEPBE/STO-3G
B
0.13103

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.333
C2 0.000 0.000 -1.117
Br3 0.000 0.000 0.689
H4 0.000 0.000 -3.419

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21653.02221.0857
C21.21651.80572.3022
Br33.02221.80574.1079
H41.08572.30224.1079

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 PBEPBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.132      
2 C -0.152      
3 Br 0.162      
4 H 0.122      


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 0.038 0.038
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.299 0.000 0.000
y 0.000 -27.299 0.000
z 0.000 0.000 -22.715
Traceless
 xyz
x -2.292 0.000 0.000
y 0.000 -2.292 0.000
z 0.000 0.000 4.584
Polar
3z2-r29.169
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 0.443 0.000 0.000
y 0.000 0.443 0.000
z 0.000 0.000 5.338


<r2> (average value of r2) Å2
<r2> 84.544
(<r2>)1/2 9.195