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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: PBE1PBE/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 PBE1PBE/6-311+G(3df,2p)
 hartrees
Energy at 0K-2650.472750
Energy at 298.15K-2650.475182
HF Energy-2650.472750
Nuclear repulsion energy124.548115
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/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 3476 3476 102.76      
2 Σ 2192 2192 31.48      
3 Σ 623 623 1.56      
4 Π 667 667 45.28      
4 Π 667 667 45.28      
5 Π 325 325 7.80      
5 Π 325 325 7.80      

Unscaled Zero Point Vibrational Energy (zpe) 4138.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4138.1 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/6-311+G(3df,2p)
B
0.13481

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-311+G(3df,2p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.300
C2 0.000 0.000 -1.102
Br3 0.000 0.000 0.679
H4 0.000 0.000 -3.365

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.19892.97981.0641
C21.19891.78102.2630
Br32.97981.78104.0439
H41.06412.26304.0439

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/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.082      
2 C -0.224      
3 Br 0.098      
4 H 0.208      


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 -0.222 0.222
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.737 0.000 0.000
y 0.000 -30.737 0.000
z 0.000 0.000 -22.435
Traceless
 xyz
x -4.151 0.000 0.000
y 0.000 -4.151 0.000
z 0.000 0.000 8.302
Polar
3z2-r216.605
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 4.669 0.000 0.000
y 0.000 4.669 0.000
z 0.000 0.000 9.835


<r2> (average value of r2) Å2
<r2> 83.977
(<r2>)1/2 9.164