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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B1B95/cc-pVTZ

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 B1B95/cc-pVTZ
 hartrees
Energy at 0K-2651.267982
Energy at 298.15K-2651.270413
HF Energy-2651.267982
Nuclear repulsion energy124.583774
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 B1B95/cc-pVTZ
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 3496 3346 95.78      
2 Σ 2200 2105 27.89      
3 Σ 620 593 1.54      
4 Π 666 637 43.97      
4 Π 666 637 43.97      
5 Π 325 311 7.20      
5 Π 325 311 7.20      

Unscaled Zero Point Vibrational Energy (zpe) 4148.4 cm-1
Scaled (by 0.9571) Zero Point Vibrational Energy (zpe) 3970.4 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 B1B95/cc-pVTZ
B
0.13490

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.299
C2 0.000 0.000 -1.103
Br3 0.000 0.000 0.679
H4 0.000 0.000 -3.360

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.19692.97861.0602
C21.19691.78172.2571
Br32.97861.78174.0388
H41.06022.25714.0388

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 B1B95/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.120      
2 C -0.117      
3 Br 0.065      
4 H 0.171      


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 -0.213 0.213
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.490 0.000 0.000
y 0.000 -30.490 0.000
z 0.000 0.000 -22.213
Traceless
 xyz
x -4.138 0.000 0.000
y 0.000 -4.138 0.000
z 0.000 0.000 8.277
Polar
3z2-r216.554
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 3.538 0.000 0.000
y 0.000 3.538 0.000
z 0.000 0.000 9.340


<r2> (average value of r2) Å2
<r2> 83.770
(<r2>)1/2 9.153