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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B3PW91/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 B3PW91/cc-pVTZ
 hartrees
Energy at 0K-2650.929885
Energy at 298.15K-2650.932292
HF Energy-2650.929885
Nuclear repulsion energy124.226184
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 B3PW91/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 3476 3343 98.61      
2 Σ 2182 2098 28.69      
3 Σ 612 589 1.53      
4 Π 656 631 45.19      
4 Π 656 631 45.19      
5 Π 320 308 7.15      
5 Π 320 308 7.15      

Unscaled Zero Point Vibrational Energy (zpe) 4111.1 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 3953.2 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 B3PW91/cc-pVTZ
B
0.13413

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVTZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.306
C2 0.000 0.000 -1.106
Br3 0.000 0.000 0.681
H4 0.000 0.000 -3.369

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.19992.98701.0629
C21.19991.78712.2628
Br32.98701.78714.0499
H41.06292.26284.0499

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 B3PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.095      
2 C -0.110      
3 Br 0.062      
4 H 0.144      


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 -0.202 0.202
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.546 0.000 0.000
y 0.000 -30.546 0.000
z 0.000 0.000 -22.217
Traceless
 xyz
x -4.164 0.000 0.000
y 0.000 -4.164 0.000
z 0.000 0.000 8.329
Polar
3z2-r216.658
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 3.565 0.000 0.000
y 0.000 3.565 0.000
z 0.000 0.000 9.418


<r2> (average value of r2) Å2
<r2> 84.173
(<r2>)1/2 9.175