return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B97D3/6-31G*

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 B97D3/6-31G*
 hartrees
Energy at 0K-2649.673875
Energy at 298.15K-2649.676327
HF Energy-2649.673875
Nuclear repulsion energy123.670501
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 B97D3/6-31G*
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 3448 3381 75.40      
2 Σ 2143 2101 27.61      
3 Σ 588 577 2.44      
4 Π 638 626 41.51      
4 Π 638 626 41.51      
5 Π 366 359 6.08      
5 Π 366 359 6.08      

Unscaled Zero Point Vibrational Energy (zpe) 4093.7 cm-1
Scaled (by 0.9804) Zero Point Vibrational Energy (zpe) 4013.5 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 B97D3/6-31G*
B
0.13281

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.320
C2 0.000 0.000 -1.105
Br3 0.000 0.000 0.684
H4 0.000 0.000 -3.390

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.21513.00461.0695
C21.21511.78942.2847
Br33.00461.78944.0741
H41.06952.28474.0741

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 B97D3/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.269      
2 C 0.128      
3 Br -0.061      
4 H 0.202      


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 -0.176 0.176
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.878 0.000 0.000
y 0.000 -29.878 0.000
z 0.000 0.000 -21.723
Traceless
 xyz
x -4.077 0.000 0.000
y 0.000 -4.077 0.000
z 0.000 0.000 8.155
Polar
3z2-r216.309
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 2.722 0.000 0.000
y 0.000 2.722 0.000
z 0.000 0.000 8.823


<r2> (average value of r2) Å2
<r2> 84.473
(<r2>)1/2 9.191