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All results from a given calculation for HCCBr (bromoacetylene)

using model chemistry: B3LYP/STO-3G

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/STO-3G
 hartrees
Energy at 0K-2621.760783
Energy at 298.15K-2621.763108
HF Energy-2621.760783
Nuclear repulsion energy122.950020
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/STO-3G
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 3680 3284 182.80      
2 Σ 2375 2120 4.69      
3 Σ 626 559 2.83      
4 Π 723 645 17.33      
4 Π 723 645 17.33      
5 Π 336 300 0.70      
5 Π 336 300 0.70      

Unscaled Zero Point Vibrational Energy (zpe) 4400.0 cm-1
Scaled (by 0.8924) Zero Point Vibrational Energy (zpe) 3926.5 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 B3LYP/STO-3G
B
0.13148

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/STO-3G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -2.326
C2 0.000 0.000 -1.121
Br3 0.000 0.000 0.688
H4 0.000 0.000 -3.406

Atom - Atom Distances (Å)
  C1 C2 Br3 H4
C11.20513.01431.0799
C21.20511.80922.2850
Br33.01431.80924.0942
H41.07992.28504.0942

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/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.125      
2 C -0.150      
3 Br 0.156      
4 H 0.119      


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 -0.079 0.079
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -27.296 0.000 0.000
y 0.000 -27.296 0.000
z 0.000 0.000 -22.719
Traceless
 xyz
x -2.289 0.000 0.000
y 0.000 -2.289 0.000
z 0.000 0.000 4.577
Polar
3z2-r29.155
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 0.431 0.000 0.000
y 0.000 0.431 0.000
z 0.000 0.000 5.213


<r2> (average value of r2) Å2
<r2> 84.279
(<r2>)1/2 9.180