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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B2PLYP/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 B2PLYP/6-31G*
 hartrees
Energy at 0K-2647.859859
Energy at 298.15K-2647.862372
HF Energy-2647.736844
Nuclear repulsion energy123.674131
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 B2PLYP/6-31G*
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 3521 3342 82.96      
2 Σ 2169 2059 15.14      
3 Σ 603 573 1.50      
4 Π 678 644 41.29      
4 Π 678 644 41.29      
5 Π 372 353 6.39      
5 Π 372 353 6.39      

Unscaled Zero Point Vibrational Energy (zpe) 4196.5 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 3983.3 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 B2PLYP/6-31G*
B
0.13286

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.319
C2 0.000 0.000 -1.108
Br3 0.000 0.000 0.684
H4 0.000 0.000 -3.383

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21093.00311.0646
C21.21091.79222.2754
Br33.00311.79224.0676
H41.06462.27544.0676

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 B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.265      
2 C 0.096      
3 Br -0.055      
4 H 0.224      


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 -0.357 0.357
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.262 0.000 0.000
y 0.000 -30.262 0.000
z 0.000 0.000 -21.859
Traceless
 xyz
x -4.201 0.000 0.000
y 0.000 -4.201 0.000
z 0.000 0.000 8.403
Polar
3z2-r216.805
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 2.674 0.000 0.000
y 0.000 2.674 0.000
z 0.000 0.000 8.439


<r2> (average value of r2) Å2
<r2> 84.613
(<r2>)1/2 9.199