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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B2PLYP/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 B2PLYP/6-311G*
 hartrees
Energy at 0K-2650.343422
Energy at 298.15K-2650.345551
HF Energy-2650.212518
Nuclear repulsion energy123.451626
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 B2PLYP/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 3485 3485 77.35      
2 Σ 2138 2138 18.22      
3 Σ 604 604 1.23      
4 Π 567 567 50.94      
4 Π 567 567 50.94      
5 Π 256 256 2.01      
5 Π 256 256 2.01      

Unscaled Zero Point Vibrational Energy (zpe) 3936.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3936.0 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 B2PLYP/6-311G*
B
0.13245

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-311G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.321
C2 0.000 0.000 -1.113
Br3 0.000 0.000 0.685
H4 0.000 0.000 -3.384

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20753.00641.0632
C21.20751.79892.2708
Br33.00641.79894.0696
H41.06322.27084.0696

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 B2PLYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.206      
2 C -0.134      
3 Br 0.081      
4 H 0.259      


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 -0.272 0.272
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.854 0.000 0.000
y 0.000 -30.854 0.000
z 0.000 0.000 -22.007
Traceless
 xyz
x -4.423 0.000 0.000
y 0.000 -4.423 0.000
z 0.000 0.000 8.847
Polar
3z2-r217.694
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 2.583 0.000 0.000
y 0.000 2.583 0.000
z 0.000 0.000 8.740


<r2> (average value of r2) Å2
<r2> 85.085
(<r2>)1/2 9.224