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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: PBE1PBE/cc-pVDZ

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 PBE1PBE/cc-pVDZ
 hartrees
Energy at 0K-2650.457841
Energy at 298.15K-2650.460221
HF Energy-2650.457841
Nuclear repulsion energy123.862805
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 PBE1PBE/cc-pVDZ
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 3510 3374 107.63      
2 Σ 2208 2123 26.05      
3 Σ 624 600 1.85      
4 Π 653 628 37.83      
4 Π 653 628 37.83      
5 Π 309 297 5.75      
5 Π 309 297 5.75      

Unscaled Zero Point Vibrational Energy (zpe) 4132.9 cm-1
Scaled (by 0.9615) Zero Point Vibrational Energy (zpe) 3973.8 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 PBE1PBE/cc-pVDZ
B
0.13326

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/cc-pVDZ

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 -1.105
Br3 0.000 0.000 0.683
H4 0.000 0.000 -3.387

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21092.99841.0721
C21.21091.78762.2830
Br32.99841.78764.0705
H41.07212.28304.0705

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 PBE1PBE/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.093      
2 C 0.033      
3 Br 0.033      
4 H 0.027      


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 -0.185 0.185
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.441 0.000 0.000
y 0.000 -30.441 0.000
z 0.000 0.000 -21.749
Traceless
 xyz
x -4.346 0.000 0.000
y 0.000 -4.346 0.000
z 0.000 0.000 8.692
Polar
3z2-r217.384
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 2.523 0.000 0.000
y 0.000 2.523 0.000
z 0.000 0.000 8.779


<r2> (average value of r2) Å2
<r2> 84.494
(<r2>)1/2 9.192