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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: PBEPBEultrafine/aug-cc-pVTZ

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 PBEPBEultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-2650.467406
Energy at 298.15K-2650.469699
HF Energy-2650.467406
Nuclear repulsion energy123.663433
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 PBEPBEultrafine/aug-cc-pVTZ
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 3401 3363 98.39      
2 Σ 2109 2085 37.52      
3 Σ 602 596 1.91      
4 Π 599 593 44.39      
4 Π 599 593 44.39      
5 Π 301 297 6.36      
5 Π 301 297 6.36      

Unscaled Zero Point Vibrational Energy (zpe) 3956.1 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 3911.8 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 PBEPBEultrafine/aug-cc-pVTZ
B
0.13285

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/aug-cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.319
C2 0.000 0.000 -1.108
Br3 0.000 0.000 0.684
H4 0.000 0.000 -3.388

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21113.00291.0696
C21.21111.79182.2807
Br33.00291.79184.0725
H41.06962.28074.0725

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 PBEPBEultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.927      
2 C 0.260      
3 Br 0.172      
4 H 0.495      


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 -0.086 0.086
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.847 0.000 0.000
y 0.000 -30.847 0.000
z 0.000 0.000 -22.906
Traceless
 xyz
x -3.971 0.000 0.000
y 0.000 -3.971 0.000
z 0.000 0.000 7.941
Polar
3z2-r215.883
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 5.016 0.000 0.000
y 0.000 5.016 0.000
z 0.000 0.000 10.386


<r2> (average value of r2) Å2
<r2> 85.099
(<r2>)1/2 9.225