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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B3LYP/Def2TZVPP

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 B3LYP/Def2TZVPP
 hartrees
Energy at 0K-2650.938310
Energy at 298.15K-2650.940701
HF Energy-2650.938310
Nuclear repulsion energy123.867161
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 B3LYP/Def2TZVPP
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 3473 3343 97.99      
2 Σ 2175 2093 29.84      
3 Σ 601 578 1.39      
4 Π 659 635 47.48      
4 Π 659 635 47.48      
5 Π 318 306 7.34      
5 Π 318 306 7.34      

Unscaled Zero Point Vibrational Energy (zpe) 4101.6 cm-1
Scaled (by 0.9626) Zero Point Vibrational Energy (zpe) 3948.2 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 B3LYP/Def2TZVPP
B
0.13340

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/Def2TZVPP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.313
C2 0.000 0.000 -1.113
Br3 0.000 0.000 0.684
H4 0.000 0.000 -3.374

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.19962.99631.0618
C21.19961.79682.2613
Br32.99631.79684.0581
H41.06182.26134.0581

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 B3LYP/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.038      
2 C -0.412      
3 Br 0.117      
4 H 0.256      


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 -0.182 0.182
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.800 0.000 0.000
y 0.000 -30.800 0.000
z 0.000 0.000 -22.732
Traceless
 xyz
x -4.034 0.000 0.000
y 0.000 -4.034 0.000
z 0.000 0.000 8.068
Polar
3z2-r216.136
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 3.963 0.000 0.000
y 0.000 3.963 0.000
z 0.000 0.000 9.650


<r2> (average value of r2) Å2
<r2> 84.735
(<r2>)1/2 9.205