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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: PBEPBE/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-2650.387587
Energy at 298.15K-2650.389871
HF Energy-2650.387587
Nuclear repulsion energy123.700066
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/6-311+G(3df,2p)
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 3397 3369 98.11      
2 Σ 2107 2090 37.84      
3 Σ 600 595 1.98      
4 Π 597 592 46.46      
4 Π 597 592 46.46      
5 Π 300 298 5.93      
5 Π 300 298 5.93      

Unscaled Zero Point Vibrational Energy (zpe) 3949.1 cm-1
Scaled (by 0.9918) Zero Point Vibrational Energy (zpe) 3916.7 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/6-311+G(3df,2p)
B
0.13293

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311+G(3df,2p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.318
C2 0.000 0.000 -1.107
Br3 0.000 0.000 0.684
H4 0.000 0.000 -3.388

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21093.00211.0701
C21.21091.79112.2810
Br33.00211.79114.0721
H41.07012.28104.0721

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/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.120      
2 C -0.185      
3 Br 0.099      
4 H 0.206      


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 -30.853 0.000 0.000
y 0.000 -30.853 0.000
z 0.000 0.000 -22.868
Traceless
 xyz
x -3.993 0.000 0.000
y 0.000 -3.993 0.000
z 0.000 0.000 7.985
Polar
3z2-r215.970
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 4.811 0.000 0.000
y 0.000 4.811 0.000
z 0.000 0.000 10.306


<r2> (average value of r2) Å2
<r2> 85.057
(<r2>)1/2 9.223