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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B3LYP/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 B3LYP/cc-pVTZ
 hartrees
Energy at 0K-2650.982435
Energy at 298.15K-2650.984821
HF Energy-2650.982435
Nuclear repulsion energy123.804232
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/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 3474 3358 97.04      
2 Σ 2178 2105 27.04      
3 Σ 600 580 1.31      
4 Π 655 633 44.84      
4 Π 655 633 44.84      
5 Π 315 305 6.92      
5 Π 315 305 6.92      

Unscaled Zero Point Vibrational Energy (zpe) 4096.0 cm-1
Scaled (by 0.9666) Zero Point Vibrational Energy (zpe) 3959.2 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/cc-pVTZ
B
0.13327

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.312
C2 0.000 0.000 -1.113
Br3 0.000 0.000 0.684
H4 0.000 0.000 -3.373

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.19882.99551.0610
C21.19881.79672.2598
Br32.99551.79674.0565
H41.06102.25984.0565

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/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.103      
2 C -0.134      
3 Br 0.078      
4 H 0.160      


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 -0.191 0.191
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.753 0.000 0.000
y 0.000 -30.753 0.000
z 0.000 0.000 -22.553
Traceless
 xyz
x -4.100 0.000 0.000
y 0.000 -4.100 0.000
z 0.000 0.000 8.199
Polar
3z2-r216.398
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 3.555 0.000 0.000
y 0.000 3.555 0.000
z 0.000 0.000 9.423


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