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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: PBEPBE/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 PBEPBE/cc-pVDZ
 hartrees
Energy at 0K-2650.366871
Energy at 298.15K-2650.369084
HF Energy-2650.366871
Nuclear repulsion energy123.011538
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/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σ 3425 3405 101.86      
2 Σ 2122 2109 30.87      
3 Σ 602 598 2.24      
4 Π 584 581 36.71      
4 Π 584 581 36.71      
5 Π 278 276 3.68      
5 Π 278 276 3.68      

Unscaled Zero Point Vibrational Energy (zpe) 3936.0 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 3913.2 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/cc-pVDZ
B
0.13138

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

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 -1.110
Br3 0.000 0.000 0.688
H4 0.000 0.000 -3.412

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.22333.02111.0787
C21.22331.79782.3020
Br33.02111.79784.0997
H41.07872.30204.0997

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/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.101      
2 C 0.064      
3 Br 0.040      
4 H -0.002      


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 -0.029 0.029
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.372 0.000 0.000
y 0.000 -30.372 0.000
z 0.000 0.000 -22.081
Traceless
 xyz
x -4.145 0.000 0.000
y 0.000 -4.145 0.000
z 0.000 0.000 8.291
Polar
3z2-r216.581
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 2.543 0.000 0.000
y 0.000 2.543 0.000
z 0.000 0.000 9.079


<r2> (average value of r2) Å2
<r2> 85.499
(<r2>)1/2 9.247