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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: HSEh1PBE/6-31G**

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 HSEh1PBE/6-31G**
 hartrees
Energy at 0K-2647.979702
Energy at 298.15K-2647.982311
HF Energy-2647.979702
Nuclear repulsion energy124.516821
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 HSEh1PBE/6-31G**
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 3515 3355 98.72      
2 Σ 2222 2121 23.14      
3 Σ 622 594 2.11      
4 Π 719 686 41.21      
4 Π 719 686 41.21      
5 Π 391 373 8.66      
5 Π 391 373 8.66      

Unscaled Zero Point Vibrational Energy (zpe) 4289.6 cm-1
Scaled (by 0.9543) Zero Point Vibrational Energy (zpe) 4093.6 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 HSEh1PBE/6-31G**
B
0.13466

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G**

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.304
C2 0.000 0.000 -1.098
Br3 0.000 0.000 0.679
H4 0.000 0.000 -3.369

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20582.98341.0653
C21.20581.77762.2711
Br32.98341.77764.0487
H41.06532.27114.0487

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 HSEh1PBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.236      
2 C 0.081      
3 Br -0.047      
4 H 0.202      


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 -0.264 0.264
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.118 0.000 0.000
y 0.000 -30.118 0.000
z 0.000 0.000 -21.640
Traceless
 xyz
x -4.239 0.000 0.000
y 0.000 -4.239 0.000
z 0.000 0.000 8.478
Polar
3z2-r216.956
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 2.723 0.000 0.000
y 0.000 2.723 0.000
z 0.000 0.000 8.645


<r2> (average value of r2) Å2
<r2> 83.639
(<r2>)1/2 9.145