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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: M06-2X/3-21G

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 M06-2X/3-21G
 hartrees
Energy at 0K-2638.128058
Energy at 298.15K-2638.130942
HF Energy-2638.128058
Nuclear repulsion energy121.976576
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 M06-2X/3-21G
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 3579 3431 85.51      
2 Σ 2285 2190 13.35      
3 Σ 588 564 0.26      
4 Π 969 929 30.67      
4 Π 969 929 30.67      
5 Π 468 449 18.76      
5 Π 468 449 18.76      

Unscaled Zero Point Vibrational Energy (zpe) 4662.5 cm-1
Scaled (by 0.9587) Zero Point Vibrational Energy (zpe) 4470.0 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 M06-2X/3-21G
B
0.12951

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/3-21G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.341
C2 0.000 0.000 -1.141
Br3 0.000 0.000 0.694
H4 0.000 0.000 -3.401

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.19983.03481.0604
C21.19981.83502.2602
Br33.03481.83504.0952
H41.06042.26024.0952

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 M06-2X/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.410      
2 C -0.319      
3 Br 0.454      
4 H 0.274      


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 -0.297 0.297
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.742 0.000 0.000
y 0.000 -30.742 0.000
z 0.000 0.000 -21.948
Traceless
 xyz
x -4.397 0.000 0.000
y 0.000 -4.397 0.000
z 0.000 0.000 8.794
Polar
3z2-r217.588
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 1.376 0.000 0.000
y 0.000 1.376 0.000
z 0.000 0.000 7.809


<r2> (average value of r2) Å2
<r2> 86.483
(<r2>)1/2 9.300